Magnum Energy ME-G User Manual

ME-G Series

Modiﬁ ed Sine Wave Inverter/Chargers

Owner’s Manual

Thank you from all of us at Sensata Technologies for purchasing this ME-G Series inverter/charger. The ME-G Series products include the ME2012-G, ME2512-G, and ME3112-G inverters; all are

under the Magnum-Dimensions brand from Sensata Technologies. We understand that you have many purchasing options in the marketplace, and we are pleased that you have decided on this product. This ME-G Series inverter/charger was proudly assembled and tested in the United States at our facility in Everett, Washington.

At Sensata, we are committed to providing you with quality products and services, and hope that your experience with us is pleasant and professional.

Disclaimer of Liability

The use of this manual and the conditions or methods of installation, operation, use, and maintenance of the ME-G Series inverter/charger is beyond the control of Sensata Technologies. Therefore, this company does not assume responsibility and expressly disclaims any liability for loss, damage, or expense whether direct, indirect, consequential, or incidental that may arise out of or be any way connected with such installation, operation, use, or maintenance.

Due to continuous improvements and product updates, the images shown in this manual may not exactly match the unit purchased.

Restrictions on Use

The ME-G Series inverter/charger may only be used in life support devices or systems with the express written approval of Sensata Technologies. Failure of this inverter can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. If the ME-G Series inverter fails, it is reasonable to assume the health of the user or other persons may be endangered.

Document Information

Description – ME-G Series Owner’s Manual Part Number and Revision – 64-0071 Rev A Date Published – April 2015

This entire manual is available for download—with many of the diagrams available in color—under the Document Library tab on our website at:

Contact Information

For Magnum-Dimensions products:

Sensata Technologies 2211 West Casino Rd. Everett, WA 98204 Phone: 425-353-8833 Fax: 425-353-8390 Web:

www.Magnum-Dimensions.com

Record unit’s model & serial number in case you need to provide this information in the future.

Model: Serial Number:

ME2012-G AW

ME2512-G AX

ME3112-G AY

Page i

Safety Information

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS FOR THE ME-G SERIES INVERTER/ CHARGER THAT SHALL BE FOLLOWED DURING THE INSTALLATION AND OPERATION OF THIS PRODUCT. Before using the ME-G Series, read all instructions and cautionary markings. Also, be sure to review the individual manuals provided for each component of the system. The installation instructions are for use by qualiﬁed personnel only. Do not perform any installation or servicing other than that speciﬁed in this owner’s manual unless you are qualiﬁed to do so. Incorrect installation or servicing may result in a risk of electric shock, ﬁre, or other safety hazard.

Safety Symbols

The following safety symbols have been placed throughout this manual to indicate dangerous and important safety instructions.

WARNING: This symbol indicates that failure to take a speciﬁ ed action could result in physical harm to the user.

CAUTION: This symbol indicates that failure to take a speciﬁ ed action could result in damage to the equipment.

Info: This symbol indicates information that emphasizes or supplements important points of the main text.

Safety Precautions

• All electrical work must be performed in accordance with local and national electrical codes.

• This product is designed for indoor/compartment installation. It must not be exposed to rain, snow, moisture, or liquids of any type.

• Use insulated tools to reduce the chance of electrical shock or accidental short circuits.

• There are no user-serviceable parts contained in this product.

• This unit is provided with integral protection against overloads.

• Live power may be present at more than one point since an inverter utilizes both DC (batteries, PV, etc.,) and AC (utility or generator) power. To reduce risk of electric shock, ensure all DC and AC wiring is disconnected prior to installing or performing maintenance on the inverter. Turning off the inverter will not reduce this risk, the inverter must be totally disconnected from all sources.

• Use Class 1 wiring methods for ﬁeld wiring connections to terminals of a Class 2 circuit.

• Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling.

• Always verify proper wiring prior to starting the inverter.

• Use only copper wires with a minimum temperature rating of 90°C (194°F).

• AC wiring must be no less than 10 AWG (5.3 mm²) gauge copper wire.

• Battery cables should be no less than #4/0 AWG (107.2 mm²) for 12-volt systems. Crimped and sealed copper ring terminal lugs with a 5/16 hole should be used to connect to the DC terminals on the inverter.

• Torque all AC wiring connections and DC cable connections to the required torque values.

• The inverter must be properly installed, see Section 2.2 “Mounting the Inverter” in this manual.

• Overcurrent protection for the battery supply is not provided as an integral part of this inverter. Overcurrent protection of the battery cables must be provided as part of the system installation. Refer to Section 2.4 “DC Wiring” for more information.

Page ii

Safety Information

• Overcurrent protection for the AC output wiring is not provided as an integral part of this inverter. Overcurrent protection of the AC output wiring must be provided as part of the system installation. Refer to Section 2.5 “AC Wiring” for more information.

• The AC output neutral conductor and the DC negative conductors are not connected (bonded) to the inverter chassis. Both the input and output conductors are isolated from the enclosure and each other. System grounding, if required, is the responsibility of the system installer and must comply with local and national electrical codes and standards. Refer to the Section 2.6 “Grounding Inverters” for more information.

Battery Safety

• Use insulated tools and be very careful when working around batteries, they can produce extremely high currents if short-circuited (e.g., dropping a metal tool across the battery terminal), which could cause a ﬁre or explosion.

• Read and follow the battery manufacturer’s safety precautions before installing the inverter and batteries. Always verify proper polarity and voltage before connecting the batteries to the inverter. Once the batteries are connected to the inverter, ensure the maintenance and charging requirements (i.e., charge voltage and charge rate) provided by the battery manufacturer are followed to extend the life of the batteries and to prevent damage to the batteries while charging.

• Wear eye protection such as safety glasses, and avoid touching your eyes and face when working with batteries to keep any ﬂ uid/corrosion on the battery from coming in contact with eyes and skin. Have plenty of fresh water and soap nearby and thoroughly wash in case battery acid contacts skin, clothing, or eyes. In the event of exposure to the eyes, ﬂood them for at least 15 minutes with running water and seek immediate medical attention. Baking soda neutralizes lead acid battery electrolyte and vinegar neutralizes spilled NiCad and NiFe battery electrolyte; depending on your battery type, keep a supply on hand near the batteries.

• Remove all jewelry such as rings, watches, bracelets, etc., when installing or performing maintenance on the batteries and inverter. A battery can produce a short-circuit current high enough to weld metal jewelry, causing severe burns.

• Never work alone. Always have someone within the range of your voice or close enough to come to your aid when working around batteries.

• Use proper lifting techniques when working with batteries.

• Never use old or untested batteries. Check each battery’s label for age, type, and date code to ensure all batteries are identical.

• Batteries are sensitive to changes in temperature. Install batteries in a stable environment.

• Batteries can produce explosive gasses, so install batteries in a well-ventilated area. For compartment or enclosure installations, always vent batteries from the highest point to the outside. Design the battery enclosure to prevent accumulation and concentration of hydrogen gas in “pockets” at the top of the compartment.

• Provide at least one inch of air space between batteries to provide optimum cooling.

• Never smoke or allow a spark near batteries.

• To prevent a spark at the battery and reduce the chance of explosion, always connect the cables to the batteries ﬁrst. Then connect the cables to the inverter.

• Never charge a frozen battery.

• The battery bank should be installed in a clean, dry, ventilated environment where they are protected from high and low temperatures. If installed in a vehicle/boat, the batteries must be mounted upright (if using liquid batteries) and securely fastened. The location must be fully accessible and protected from exposure to heat producing devices, and away from any fuel tanks.

Page iii

Safety Information

CONSIGNES DE SÉCURITÉ IMPORTANTES

CE MANUEL CONTIENT DE IMPORTANTES POUR LA SÉRIE ME ONDULEUR/CHARGEUR QUI DOIVENT ETRE SUIVIES PENDANT L’INSTALLATION ET FONCTIONNEMENT DE CE PRODUIT. Avant d’utiliser la série ME, lire toutes les instructions etles mises en garde. Aussi, n’oubliez pas depasser en revue les différents manuels fournispour chaque composant du système. Lesinstructions d’installation sont pour une utilisationpar du personnel qualiﬁ é. Ne pas effectuer une installation ou d’entretien autres que ceux spéciﬁ és dans ce manuel, sauf si vous êtes qualiﬁ é pour le faire. Une mauvaise installation ou d’entretien peut entraîner un risque de choc électrique, un incendie ou autre danger pour la sécurité.

Symboles de sécurité

Les symboles de sécurité suivants ont été placéstout au long de ce manuel pour indiquer des conditions dangereuses et les consignes de sécurité importantes.

AVERTISSEMENT: Ce symbole indique que le défaut de prendre une action spéciﬁ ée pourraitcauser des dommages physiques à l’utilisateur.

ATTENTION: Ce symbole indique que le défaut de prendre une action spéciﬁ ée peut entraîner des dommages à l’équipement.

Info: Ce symbole indique une information qui met l’accent ou des suppléments points importants du texte principal.

Consignes de sécurité

• Tous les travaux électriques doivent être effectués en conformité avec les codes locaux et

• Ce produit est conçu pour l’installation / du compartiment intérieur. Il ne doit pas être exposé à la pluie, la neige, l’humidité ou des liquides de tout type.

• Utiliser des outils isolés pour réduire le risque de choc électrique ou courts-circuits accidentels.

• Il n’ya pas de pièces réparables par l’utilisateur de ce produit.

• Cet appareil est fourni avec une protection intégrale contre les surcharges.

• Puissance en direct peuvent être présents à plus d’un point depuis un onduleur utilise à la fois DC (piles, PV, etc) et AC (utilitaire ou générateur) d’alimentation. Pour réduire le risque de choc électrique, assurez-vous que tout le câblage DC et AC est débranchée avant l’installation ou la maintenance sur le variateur. Mise hors tension de l’onduleur ne réduira pas ce risque, l’onduleur doit être totalement déconnectée de toutes les sources.

• Utiliser des méthodes de câblage classe 1 pour les connexions de câblage sur le terrain aux bornes d’un circuit de Classe 2.

• En vente ou de l’équipement étiqueté doit être installé et utilisé conformément aux instructions ﬁ gurant dans la liste ou l’étiquetage.

• Toujours vériﬁ er le câblage avant de commencer l’onduleur.

• Utilisez des ﬁ ls de cuivre seulement avec une cote de température minimale de 90°C.

• AC câblage ne doit pas être inférieure à 10 AWG (5.3 mm²) de cuivre de calibre câblage.

• Les câbles de batterie ne doit pas être inférieur à #4/0 AWG (107.2 mm²) pour 12-volt systèmes. Frisées et scellé cosses en cuivre anneau des bornes avec un trou de 5/16 doit être utilisé pour se connecter à des bornes de courant continu sur l’onduleur.

• Couple de serrage de tous les AC connexions de câblage et DC connexions de câble pour les valeurs de couple requises.

• L’onduleur doit être correctement monté, voir le montage de la section onduleur dans le chapitre Installation de ce manuel.

• Protection contre les surintensités pour l’alimentation de la batterie n’est pas fourni en tant que partie intégrante de cet inverseur. La protection contre les surintensités des câbles de batterie doivent être fournis dans le cadre de l’installation du système. Se reporter à la Section 2.4 DC Câblage pour plus d’informations.

Page iv

Safety Information

• La protection contre les surintensités pour le câblage de sortie CA n’est pas fourni en tant que partie intégrante de cet inverseur. Protection contre les surintensités du câblage de sortie CA doit être fournie dans le cadre de l’installation du système. Reportez-vous à la Section 2.5 “Câblage ca” pour plus d’informations.

• Le conducteur de courant alternatif de sortie neutre et les conducteurs à courant continu négatives ne sont pas connectés (servitude) au châssis inverseur. La fois l’entrée et des conducteurs de sortie sont isolés de l’enceinte et l’autre. La terre du système, si nécessaire, est de la responsabilité de l’installateur du système et doit se conformer à des codes locaux et nationaux et les normes électriques. Reportez-vous aux Section 2.6 Les onduleur à la terre pour plus d’informations.

Sécurité de la batterie

• Utiliser des outils isolés et être très prudent lorsque vous travaillez près des batteries, elles peuvent produire des courants extrêmement élevés si en court-circuit (par exemple, échapper un outil métallique à travers la borne de la batterie), ce qui pourrait provoquer un incendie ou une explosion.

• Lisez et suivez les consignes de sécurité du fabricant de la batterie avant d’installer l’onduleur et des batteries. Toujours vériﬁ er la polarité et la tension avant de brancher les batteries à l’onduleur. Une fois que les batteries sont connectées à l’onduleur, assurer la maintenance et les exigences de charge (c.-à-tension de charge et taux de charge) fournis par le fabricant de la batterie sont suivies pour prolonger la vie des batteries et pour éviter d’endommager les batteries pendant la charge.

• Porter des lunettes de protection tels que des lunettes de sécurité, et évitez de toucher vos yeux et le visage lorsque l’on travaille avec des piles de garder tout ﬂ uide / corrosion sur la batterie d’entrer en contact avec les yeux et la peau. Ayez sufﬁ samment d’eau fraîche et de savon à proximité et se laver dans le cas d’acide contact avec la peau de la batterie, les vêtements ou les yeux. Dans le cas d’exposition pour les yeux, les inonder pendant au moins 15 minutes à l’eau courante et consulter immédiatement un médecin. Le bicarbonate de soude neutralise l’acide de plomb électrolyte de la batterie et le vinaigre neutralise renversé NiCad et NiFe batterie à électrolyte; en fonction de votre type de batterie, gardez sous la main près des batteries.

• Enlevez tous les bijoux tels que bagues, montres, bracelets, etc, lors de l’installation ou la maintenance sur les batteries et l’onduleur. Une batterie peut produire un court-circuit assez de courant élevé pour souder les bijoux en métal, provoquant de graves brûlures.

• Ne jamais travailler seul. Toujours avoir quelqu’un au sein de la gamme de votre voix ou sufﬁ samment près pour vous venir en aide lorsque vous travaillez près des batteries.

• Utiliser des techniques de levage appropriées lorsque vous travaillez avec des piles.

• Ne jamais utiliser de piles usagées ou non testés. Vériﬁ ez l’étiquette de chaque batterie à l’âge, le type et le code de date aﬁ n d’assurer toutes les batteries sont identiques.

• Piles sensibles aux changements temporaires, installer dans un environnement stable.

• Les batteries peuvent produire des gaz explosifs, etc installer les piles dans un endroit bien ventilé. Pour les installations compartiment ou une enceinte, toujours évacuer les piles du plus haut point à l’extérieur. Concevoir le boîtier de piles pour éviter l’accumulation et la concentration de gaz d’hydrogène dans “poches” en haut du compartiment.

• Fournir au moins un pouce de l’espace aérien entre les batteries pour fournir un refroidissement optimal.

• Ne jamais fumer ou laisser une étincelle près des batteries.

• Pour éviter une étincelle à la batterie et de réduire le risque d’explosion, toujours connecter les câbles aux batteries en premier. Ensuite, connectez les câbles à l’onduleur.

• Ne jamais charger une batterie gelée.

• La banque de la batterie doit être installé dans un endroit propre, sec, aéré et où ils sont protégés contre les températures élevées et basses. S’il est installé dans un véhicule / bateau, les batteries doivent être monté en position verticale (si vous utilisez des piles liquides) et solidement ﬁ xés. L’emplacement doit être pleinement accessible et protégé contre l’exposition à la chaleur la fabrication de dispositifs, et loin de toute réservoirs de carburant.

CONSERVER CES INSTRUCTIONS

Page v

Table of Contents

1.0 Introduction ...........................................................................................1

1.1 How an ME-G Series Inverter/Charger Works ........................................................... 1

1.2 What Appliances will run from a Modiﬁ ed Sine Wave Inverter ..................................... 2

1.3 Features and Beneﬁ ts ........................................................................................... 2

2.0 Installation .............................................................................................5

2.1 Pre-Installation ................................................................................................... 5

2.1.1 Unpacking and Inspection ................................................................................ 5

2.1.2 Required Tools and Materials ............................................................................ 5

2.1.3 Locating the Inverter ....................................................................................... 7

2.2 Mounting the Inverter .......................................................................................... 8

2.3 Wiring the Inverter – General Requirements .......................................................... 10

2.3.1 Protecting Wire – Conduit Box .........................................................................10

2.3.2 Wiring Requirements ......................................................................................10

2.3.3 Wire Routing .................................................................................................10

2.3.4 Torque Requirements .....................................................................................10

2.4 DC Wiring ......................................................................................................... 11

2.4.1 DC Wire Sizing ..............................................................................................13

2.4.2 DC Overcurrent Protection ..............................................................................13

2.4.3 DC Cable Connections ....................................................................................14

2.4.4 Wiring the Battery Bank .................................................................................15

2.4.5 Battery Temperature Sensor Installation and Wiring ...........................................15

2.4.6 Wiring the Inverter to the Battery Bank ............................................................16

2.5 AC Wiring ......................................................................................................... 17

2.5.1 Pre-AC Wiring Requirements ...........................................................................17

2.5.2 AC Wire Size and Overcurrent Protection...........................................................17

2.5.3 Recommended GFCIs (Ground Fault Circuit Interrupters) ....................................17

2.5.4 AC Terminal Block Connections ........................................................................18

2.5.5 AC Conductor Wiring ......................................................................................19

2.5.6 AC Wiring Conﬁ guration ..................................................................................20

2.6 Grounding Inverters ........................................................................................... 25

2.6.1 Equipment Grounding .....................................................................................25

2.6.2 Grounding on Boats .......................................................................................26

2.6.3 Neutral to Safety Ground Bonding ....................................................................27

2.6.4 Connecting a Large DC Ground Wire .................................................................28

2.7 Inverter Notiﬁ cation Requirements ....................................................................... 28

2.8 Final Inspection ................................................................................................. 28

2.9 Functional Test .................................................................................................. 29

3.0 Operation .............................................................................................30

3.1 Inverter Mode ................................................................................................... 30

3.2 Standby Mode ................................................................................................... 31

3.3 Battery Charging ............................................................................................... 31

3.4 Transfer Time .................................................................................................... 33

3.5 Battery Temperature Sensor Operation ................................................................. 33

3.6 Protection Circuitry Operation .............................................................................. 34

3.7 Inverter Startup ................................................................................................ 35

3.8 Factory Default Values ........................................................................................ 36

3.9 Using the GFCI .................................................................................................. 37

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Table of Contents (Cont.)

3.10 Inverter Fan Operation ....................................................................................... 38

3.11 Using a Remote with the ME-G Series Inverter ....................................................... 38

4.0 Maintenance and Troubleshooting ........................................................ 39

4.1 Recommended Inverter and Battery Care .............................................................. 39

4.2 Storage for Mobile Installations ........................................................................... 39

4.3 Troubleshooting ................................................................................................. 40

4.4 Resetting the Inverter ........................................................................................ 41

4.4.1 Performing an Inverter Reset (i.e., soft reset) ....................................................41

4.4.2 Performing a Power Reset (i.e., power reset) .....................................................41

Appendix A – Speciﬁ cations and Optional Equipment ....................................42

A-1 Inverter/Charger Speciﬁ cations ........................................................................... 42

A-2 Optional Equipment and Accessories .................................................................... 43

Appendix B – Battery Information .................................................................44

B-1 Battery Location ................................................................................................ 44

B-2 Battery Types .................................................................................................... 44

B-3 Battery Temperature .......................................................................................... 44

B-4 Battery Bank Sizing ........................................................................................... 44

B-5 Battery Bank Sizing Worksheet ............................................................................ 45

B-6 Battery Wiring Conﬁ gurations .............................................................................. 46

B-6.1 Series Wiring ................................................................................................46

B-6.2 Parallel Wiring ...............................................................................................46

B-6.3 Series-Parallel Wiring .....................................................................................46

Appendix C – Power Consumption & Output Waveforms ...............................48

C-1 Appliances and Run Time .................................................................................... 48

C-2 Output Waveform ............................................................................................. 48

Appendix D – Inverter/Charger Terminology ................................................49

Appendix E – Warranty & Service ..................................................................51

E-1 Limited Warranty ............................................................................................... 51

E-2 How to Receive Repair Service ............................................................................. 52

List of Tables

Table 2-1, Recommended DC Wire/Overcurrent Device for Rated Use .................................13

Table 2-2, DC Wire Size For Increased Distance (in free air) ..............................................14

Table 2-3, AC Input/Output Wiring Conﬁ gurations ............................................................20

Table 2-4, Equipment Grounding Conductor Sizing ...........................................................25

Table 3-1, Inverter Battery Turn On/Off Levels .................................................................34

Table 3-2, Inverter/Charger Default Values .....................................................................36

Table 3-3, Inverter Compatibility Level ...........................................................................38

Table 4-1, Basic Troubleshooting ....................................................................................40

Table C-1, Typical Appliance Power Consumption ..............................................................48

Page vii

List of Figures

Figure 1-1, Power Switch, Status LED, and Accessory Connection Ports ................................ 3

Figure 1-2, Electrical Connection Points ........................................................................... 3

Figure 1-3, Left Side Features ........................................................................................ 4

Figure 2-1, Simpliﬁ ed Installation Diagram for Permanent Installations ................................ 6

Figure 2-2, Approved Mounting Positions ......................................................................... 8

Figure 2-3, ME-G Series Dimensions ............................................................................... 9

Figure 2-4, DC and Battery Temperature Sensor Wiring ....................................................12

Figure 2-5, Battery Hardware Installation .......................................................................14

Figure 2-6, Inverter DC Hardware Installation .................................................................14

Figure 2-7, Battery Temperature Sensor .........................................................................15

Figure 2-8, AC Terminal Block .......................................................................................18

Figure 2-9, AC Wiring for a Single In Conﬁ guration ..........................................................21

Figure 2-10, AC Wiring for Single In – Single Out (30A) Conﬁ guration ................................22

Figure 2-11, AC Wiring for a Single In – Single Out (50A) Conﬁ guration ..............................23

Figure 2-12, AC Wiring for a Dual In – Single Out Conﬁ guration .........................................24

Figure 2-13, Neutral-to-Ground Connection (Inverter Mode) ..............................................27

Figure 2-14, Neutral-to-Ground Connection (Standby Mode) ..............................................27

Figure 2-15, Connecting a Large DC Ground Wire ............................................................28

Figure 2-16, Warning Label ...........................................................................................28

Figure 2-17, ME-G Series AC Voltage Checks ...................................................................29

Figure 3-1, Power Flow – Inverter Mode ..........................................................................30

Figure 3-2, Power Flow – Standby Mode .........................................................................31

Figure 3-3, Automatic 4-Stage Charging Graph ................................................................32

Figure 3-4, BTS Temperature to Charge Voltage Change ...................................................33

Figure 3-5, Power Switch and Status Indicator .................................................................35

Figure 3-6, Ground Fault Circuit Interrupter ....................................................................37

Figure 4-1, Performing an Inverter Reset ........................................................................41

Figure B-1, Series Battery Wiring ...................................................................................46

Figure B-2, Parallel Battery Wiring .................................................................................46

Figure B-3, Series-Parallel Battery Wiring .......................................................................46

Figure B-4, Battery Bank Wiring Examples ......................................................................47

Figure C-1, AC Waveforms ............................................................................................48

Page viii

Introduction

1.0 Introduction

Congratulations on your purchase of a ME-G Series inverter/charger from Sensata. The ME-G Series products include the ME2012-G, ME2512-G, and ME3112-G inverters; all are under the Magnum-Dimensions brand from Sensata Technologies. The ME-G Series is a modiﬁ ed sine wave inverter designed especially for mobile applications. Powerful, yet simple to operate, this inverter/ charger will provide you with the years of trouble-free performance.

Installation is easy. Simply connect the inverter’s output to your distribution circuits or electrical panel, connect your AC to the inverter, connect the batteries, and then switch it on for power.

Info: This is a sizable manual and much of it is fairly technical. Terms may be used throughout the manual that are unfamiliar to you. Refer to the Inverter/Charger Terminology glossary in Appendix D for clariﬁ cation.

The ME-G Series inverter/chargers provide the following:

• 2000, 2500, or 3100-watt models in a small footprint—less area needed for installation

• Modiﬁ ed sine wave output

• Automatic Power Factor Corrected (PFC) multi-stage battery charging

• RS485 standard communication protocol

• Factory-installed Ground Fault Circuit Interrupter (GFCI) outlet (with test and reset capability) for AC output

• Remote and Network ports (easy connection for optional accessories)

• Inverter-mounted ON/OFF switch with LED indicator

• 30 amps per leg AC pass-through capability

• Field-serviceable for qualiﬁ ed personnel—tested repair kits available

• Automatic battery temperature compensation (using battery temperature sensor)—for optimum charging even during extreme temperature changes

• Overcurrent, over-temperature, and high/low battery voltage protection

Regulatory Compliance

The ME-G Series inverter/charger is designated as a standalone power inverter with an internal battery charger. It can be connected to shorepower/utility grid (or to a generator) to allow the inverter batteries to be charged, and to power inverter loads while connected. The ME-G series is not a grid-interactive (also known as utility-interactive) inverter and does not have the capability to export (or sell) power back into the utility grid.

The ME-G Series has been tested and listed to UL 458, 5th Edition (Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Crafts) for use in the US; and is also certiﬁ ed to CSA C22.2 No. 107.1-01 (General Use Power Supplies) for use in Canada. It has been tested and certiﬁed to these product safety standards by Intertek Testing Services (known as ETL), which is a Nationally Recognized Testing Laboratory (NRTL). NRTL’s are qualiﬁed organizations that meet Occupational Safety and Health Administration (OSHA) regulations to perform independent safety testing and product certiﬁ cation.

1.1 How an ME-G Series Inverter/Charger Works

There are two modes of operation associated with this inverter/charger:

• Inverter Mode: When the inverter is properly connected to batteries and turned on, the direct current (DC) from the batteries is transformed into a modiﬁ ed sine wave alternating current (AC). This AC is similar to the voltage provided by a utility for your home, and is used to power the electrical appliances (i.e., AC loads) connected to the inverter’s output.

• Standby Mode: When an external source of AC power (e.g., utility or onboard generator) is connected and qualiﬁ ed on the inverter’s AC input, it operates in Standby mode. In Standby mode, the unit operates as a battery charger to convert the incoming AC power into DC power to recharge the batteries; and at the same time, automatically closes an internal AC transfer relay to pass the incoming AC power directly to the inverter’s output to continue powering the connected electrical appliances.

Page 1

Introduction

1.2 What Appliances will run from a Modiﬁ ed Sine Wave Inverter

Today’s inverters come in two basic output waveforms: modiﬁ ed sine wave (a modiﬁ ed square wave—see Figure C-1 in Appendix C) and pure sine wave. Modiﬁ ed sine wave inverters approximate a pure sine waveform and will run most appliances and electronics without problems. These inverters are less expensive, and therefore, offer a viable alternative to more expensive pure sine inverters.

The output of the ME-G Series is a modiﬁ ed sine wave which will run most electronic and household items, including but not limited to: TV, VCR, satellite dish receiver, computers, and printers. Some devices such as rechargeable power supplies for phones, drills, and other like items may not run, and could even be at risk for damage from modiﬁ ed sine wave inverters.

1.3 Features and Beneﬁ ts

The ME-G Series inverter/charger allows easy access to wiring, circuit breakers, and controls. Their die cast baseplate with one-piece aluminum cover ensures maximum durability with minimum weight, as well as a cooler, more efﬁ cient operation.

The bottom of ME-G inverters are equipped with the following (refer to Figures 1-1 and 1-2):

Power ON/OFF Switch – a momentary pushbutton switch that alternately turns the

inverter on or off.

Status LED Indicator – this green LED illuminates to provide information on the inverter

or charger operation.

Stack/Accessories Connection Port (red label) – a RJ11 port that accepts optional

accessories. Note: Stacking feature not available with ME-G Series.

Network Connection Port (green label) – a RJ11 port that accepts optional network

capable accessories (e.g., Auto Gen Start or Battery Monitor).

Remote Connection Port (blue label) – a RJ11 port that allows an optional remote

control to be connected.

Battery Temperature Sensor Connection Port (yellow label) – RJ11 port that

accepts the remote Battery Temperature Sensor (BTS).

DC Equipment Ground Terminal – this connection is used to tie the exposed chassis

of the inverter to the DC grounding system. This terminal accepts CU/AL conductors from #14 to #2 AWG (2.1 to 33.6 mm2).

AC Entry/Exit Connections – two 3/4” knockouts provided with cable-clamp strain

reliefs to allow and hold the AC input and output ﬁ eld wiring.

Intake Air Vents – ventilation openings to pull in air to help keep the inverter cool for

peak performance.

Positive DC Terminal – provides a 360 degree connection point for the positive (+)

cable from the battery bank; consists of a 5/16-18 bolt with a Kep or Flange nut on to hold the battery cable to the DC terminal.

Negative DC Terminal – provides a 360 degree connection point for the negative (–)

cable from the battery bank; consists of a 5/16-18 bolt with a Kep or Flange nut on to hold the battery cable to the DC terminal.

Mounting Flange – used to secure the inverter to a shelf or wall.

Introduction

Power ON/OFF Switch

Status LED Indicator

(Charging/Inverting)

Stack/Accessories Port

(red label – RJ11 connection)

Network Port

(green label – RJ11 connection)

Remote Port

(blue label – RJ11 connection)

Battery Temp Sensor Port

(yellow label – RJ11 connection)

Figure 1-1, Power Switch, Status LED, and Accessory Connection Ports

Intake Air Vents

(and on right front side)

AC Entry/Exit

Connections

DC Equipment

Ground Terminal

Positive (+) DC terminal

(under cover)

Negative (–)

DC terminal

(under cover)

Mounting

Flange

Figure 1-2, Electrical Connection Points

Page 3

Introduction

The left side of ME-G Series inverters are equipped with the following features (see Figure 1-3):

Exhaust Air Vents – ventilation openings that allow heated air to be removed by the

internal cooling fan.

Model/Serial Number Label – includes model/serial number information, date of

manufacture, and inverter and charger speciﬁ cations. See the ME-G Series speciﬁ cations in Appendix A for more information and a list of available models.

AC Access Cover – provides access to the internal AC wiring terminal block (see Figure

2-8). This terminal block is used to hard wire all inverter AC input and output wiring connections. Remove the two screws to access the AC wiring terminal block.

GFCI (Ground Fault Circuit Interrupter) – a 20-amp rated dual outlet that quickly

stops the ﬂow of electricity in the event a ground fault occurs on the device that is plugged into the inverter.

HOT 1 Input – this 30-amp circuit breaker protects the unit’s internal charger wiring and pass-thru relay while in Standby mode. The circuit breaker pops out when it opens—

press in to reset. The input circuit breaker is not branch-rated, therefore branch-rated circuit breakers must be installed in the inverter’s input wiring.

GFCI Output – this 20-amp circuit breaker is branch-rated and protects the wiring to the

GFCI outlet. This circuit breaker pops out when it opens—press in to reset. It can also be manually pulled to disconnect the inverter’s loads.

CAUTION: The inverter’s internal AC transfer relay is rated for 30 amps per wired input (not the GFCI circuit). The pass-thru current must be no greater than 30 amps per leg or damage to the relays may occur.

Exhaust Air

Vents

(back & right

side)

GFCI Output

Circuit Breaker

Model/Serial

Number Label

HOT 1 Input Circuit

Breaker

AC Access

Cover

GFCI

Figure 1-3, Left Side Features

Installation

2.0 Installation

Info: Installations should be performed by qualiﬁ ed personnel, such as a licensed

or certiﬁ ed electrician. It is the installer’s responsibility to determine which safety codes apply and to ensure that all applicable installation requirements are followed. Applicable installation codes vary depending on the speciﬁ c location and application of the installation.

CAUTION: Review the “Important Product Safety Information” on pages ii-v before any installation.

CAUTION: The inverter is heavy. Use proper lifting techniques during installation to prevent personal injury.

The simpliﬁ ed system diagram shown in Figure 2-1 should be reviewed to assist you in planning and designing your installation. This drawing is not intended to override or restrict any national or local electrical codes. This drawing should not be the determining factor as to whether the installation is compliant, that is the responsibility of the electrician and the on-site inspector.

2.1 Pre-Installation

Before proceeding, read the entire Installation section to determine how to best install your ME-G inverter/charger. The more thorough you plan in the beginning, the better your inverter needs will be met.

2.1.1 Unpacking and Inspection

Carefully remove the ME-G Series inverter/charger from its shipping container and inspect all contents. Verify the following items are included:

• The ME-G Series inverter/charger

• Red and black DC terminal covers with Phillips screws

• Two 5/16” Kep or Flange nuts (installed on the DC terminals)

• Battery Temperature Sensor

• Warning label

• ME-G Series Owner’s Manual

If items appear to be missing or damaged, contact your Magnum product authorized dealer or Sensata. If at all possible, keep your shipping box to help protect your inverter from damage if it ever needs to be returned for service. Save your proof-of-purchase as a record of your ownership; it will also be needed if the unit should require in-warranty service.

Record the unit’s model and serial number in the front of this manual in case you need to provide this information in the future. It is much easier to record this information now, instead of trying to gather it after the unit has been installed.

2.1.2 Required Tools and Materials

Hardware/Materials

• Strain-reliefs, and appropriate ﬁ ttings • Electrical tape

• 1/4” mounting bolts and lock washers (x4 min.) • Wire ties

Tools

• Miscellaneous screwdrivers • Pliers • Wire strippers

• Drill and drill bits • Pencil or marker • Multimeter

• Level • 1/2” wrench

Page 5

Installation

Shorepower

120/240VAC Output

GFCI

(inverter left side)

Main Panel

OFF

120/240VAC Output

Transfer

Switch

Power ON/O FF Ch argi ng/ Inv ert in g

Stack/ Accessor ies Net work Rem ote Batte ry Temp Se nsor

Generator Power

ME-RC50

PWR

FAULT

CHG

INV

ON/OFF

CHARGER

ON/ OFF

INVE R T E

Remote Controls (Magnum Accessories)

120VAC in verte r pow er

(or 120VAC pass-thru

power ) to sub-panel

SEL ECT

AGS METER SETUPSHORE

TECH

ME-G

Series

Inverter/

Charger

ME-ARC50

Sub-Panel

OFF

ME-AGS-N

Auto Gen

Start

Controller

(Magnum

Accessory)

30A

OFF

AC Out

(to AC loads)

DC Shunt

Overcurrent

Protection

(breaker or

fuse/switch)

120

VAC

120

VAC

120/

240VAC

power to

inverter

BTS

ME-BMK

Battery

Monitor with

shunt

(Magnum

Accessory)

ME-SBC

Smart

Battery

Combiner

(Magnum

Battery Bank

Accessory)

Figure 2-1, Simpliﬁ ed Installation Diagram for Permanent Installations

Page 6

Installation

2.1.3 Locating the Inverter

Only install the inverter in a location that meets the following requirements: Clean and Dry – The inverter should not be installed in an area that allows dust, fumes, insects,

or rodents to enter or block the inverter’s ventilation openings. This area also must be free from any risk of condensation, water, or any other liquid that can enter or fall on the inverter. The inverter uses stainless steel fasteners, plated copper busbars, and a power-coated aluminum base, and the internal circuit boards are conformal coated—all to help ﬁ ght the harmful effects of corrosive environments. However, the inverter’s life is uncertain if used in these types of environments, and inverter failure under these conditions is not covered under warranty.

Info: If the inverter is installed in an area where moisture may occur, we recommend putting silicone dielectric grease compound into the electrical ports (Figure 1-1, Items 3-6). Before installing the cables, or if leaving any ports open, squirt a liberal amount into each port. Silicone dielectric compound makes an effective moisture and corrosive

barrier to help protect and prevent corrosion to the RJ11 connections.

Cool – The inverter should be protected from direct sun exposure or equipment that produces extreme heat. The ambient temperature around the inverter must not exceed 77°F (25°C) to meet power speciﬁ cations.

Ventilation – In order for the inverter to provide full output power and avoid over-temperature fault conditions, do not cover or block the inverter’s ventilation openings or install this inverter in an area with limited airﬂ ow. The inverter uses two fans to provide forced air cooling, these fans pull in air through the intake vents (Figure 1-2, Item 9) and blow out air through the exhaust vents (Figure 1-3, Item 13). Allow at the minimum an airspace clearance of 6” (15.2 cm) at the intake and exhaust vents, and 3” (7.6 cm) everywhere else to provide adequate ventilation.

If installed in an enclosure, a fresh air intake opening must be provided directly to the front side (intake vents) of the inverter and an exhaust opening on the back side (exhaust vents) of the inverter. This allows cool air from the outside to ﬂ ow into the inverter, and allows interior heated air to exit the inverter and the enclosure. When mounted in an enclosed compartment, airﬂ ow must be ≥ 100 cfm in order to maintain no more than a 68°F (20°C) rise in compartment temperature.

CAUTION: Do not mount this inverter in a zero clearance compartment, nor cover or obstruct the ventilation openings—overheating may result.

Safe – Keep any ﬂ ammable/combustible material (e.g., paper, cloth, plastic, etc.) that may be ignited by heat, sparks, or ﬂ ames at a minimum distance of 2 feet (61 cm) away from the inverter.

WARNING: The ME-G Series inverter/charger is not ignition-protected. Do not install this inverter in any area that contains extremely ﬂ ammable liquids like gasoline or propane.

Close to the battery bank – The inverter should be located as close to the batteries as possible. Long DC wires tend to loose efﬁ ciency and reduce the overall performance of an inverter. However, the unit should NOT be installed in the same compartment as the batteries, or mounted where it will be exposed to gases produced by the batteries. These gases are corrosive and will damage the inverter; also, if these gases are not ventilated and allowed to collect, they could ignite and cause an explosion.

Accessible – Do not block access to the inverter’s remote control and accessory ports, as well as the inverter’s on/off switch and status indicator. Allow enough room to access the AC and DC wiring terminals and connections, as they will need to be checked and tightened periodically. See Figure 2-3 for the ME-G Series inverter/charger’s dimensions.

Away from sensitive electronic equipment – High powered inverters can generate levels of RFI (Radio Frequency Interference). Locate any electronic equipment susceptible to radio frequency and electromagnetic interference as far away from the inverter as possible.

Page 7

Installation

2.2 Mounting the Inverter

The inverter base can reach a temperature up to 90°C (194°F) and should be mounted on a noncombustible surface*. This surface and the mounting hardware must also be capable of supporting at least twice the weight of the inverter. To meet regulatory requirements, the ME-G Series must be mounted in one of the following positions, as shown in Figure 2-2:

• above or under a horizontal surface (shelf or table),

• on a vertical surface (wall) with the DC terminals to the right,

• on a vertical surface (wall) with the DC terminals toward the bottom, the MP-HOOD (inverter hood) installed on the top, and either the ME-CB or MPX-CB (Conduit Box) installed on the inverter’s bottom.

Info: The ME-CB, MPX-CB, and MMP Series enclosures prevent material from falling out the bottom during an internal ﬁ re, and also allow sufﬁ cient ventilation to prevent the inverter from overheating under normal operating conditions. The MP-HOOD inverter hood helps prevent items from falling inside causing damage to the inverter.

After determining the mounting position, refer to the physical dimensions as shown in Figure 2-3, or use the base of the inverter as a template to mark your mounting screw locations. After marking the mounting screw locations, mount the unit with appropriate mounting hardware.

* Noncombustible surface – A surface made of material that will not ignite, burn, support combustion, or release ﬂ ammable vapors when subjected to ﬁ re or heat as per the ASTM E136 standard. For the most part, these are materials that are largely comprised of inorganic matter such as stone, steel, iron, brick, tile, concrete, slate, and glass. Avoid common building materials such as gypsum board, painted surfaces, wall coverings, and all types of wood. Note: Sensata provides a noncombustible backplate for mounting the inverter.

RESET

TEST

SHELF OR TABLE

OUNTED

(RIGHT SIDE UP)

WALL MOUNTED

(DC TERMINALS TO THE RIGHT)

SHELF OR TABLE MOUNTED

(UP SIDE DOWN)

WALL MOUNTED (DC TERMINALS

FACING DOWN*)

*WHEN THE INVERTER IS

MOUNTED ON THE WALL

IN THIS POSITION, THE INVERTER HOOD (MP-

HOOD)

OVER THE EXHAUST VENTS

(

MUST BE MOUNTED

TOP) AND A CONDUIT BOX

(ME-CB

MUST BE ATTACHED TO

THE INVERTER’S DC END

OR MPX-CB)

(

BOTTOM).

Page 8

Figure 2-2, Approved Mounting Positions

Installation

Side

Right

6 ⅝"

(16.8 cm)

Exhaust Air Vents

Vents

Exhaust Air Vents

4 ⅞"

(12.4 cm)

(5.1 cm)

(12.4 cm)

Air Intake

Air Intake Vents

Top

12 ⅝"

(32.1 cm)

Front

13 ¾"

(34.9 cm)

RESET

(20.3 cm)

20 30

TEST

12"

(30.5 cm)

(x4)

9/32"

(7 mm)

Use up to

Keyhole slots

screw/bolt

Mounting

Bottom

Holes (x4)

Mounting Holes

Figure 2-3, ME-G Series Dimensions

Left

Side

Page 9

Installation

2.3 Wiring the Inverter – General Requirements

This section describes the requirements and recommendations for wiring the ME-G Series inverter/ charger. Before wiring the ME-G inverter/charger, carefully read all instructions.

Wiring should meet all local codes and industry standards, and be performed by qualiﬁ ed personnel such as a licensed electrician.

The NEC (National Electric Code, ANSI/NFPA 70) for the United States and the CEC (Canadian Electrical Code) for Canada provide safe wiring standards. The NEC/CEC lists requirements for wire sizes, overcurrent protection, and installation methods/standards.

Inverter/charger systems involve power from multiple sources (inverter, generator, utility, batteries, etc.) which make the wiring more hazardous and challenging. The input/output AC and DC circuits are isolated from the inverter chassis. The inverter system grounding is the responsibility of the installer in accordance with the NEC/CEC and local codes.

WARNING: Ensure all sources of DC power (i.e., batteries) and AC power (utility power or AC generator) are de-energized (i.e., breakers opened, fuses removed) before proceeding—to prevent accidental shock.

2.3.1 Protecting Wire – Conduit Box

The AC and DC wires to and from the inverter must be protected as required by code. Use jacketed wires. Sensata offers DC conduit boxes (ME-CB or MPX-CB) that include the necessary AC and DC inverter breakers.

Info: The strain reliefs can be removed and replaced with 3/4” grommets if you are using either the ME-CB or MPX-CB conduit box, and the AC wires are individual conductors (i.e., not jacketed).

2.3.2 Wiring Requirements

• All conductors that are at risk for physical damage must be protected or placed in a raceway.

• Always check for existing electrical, plumbing, or other areas of potential damage prior to making cuts in structural surfaces or walls.

• Where DC wiring must cross AC or vice-versa, try to make the wires at the crossing point perpendicular (90 degrees) to one another.

• Both AC and DC overcurrent protection must be provided as part of the installation.

• The inverter requires a reliable negative and ground return path directly to the battery.

• Use only copper wires with a minimum temperature rating of 90°C (194°F).

2.3.3 Wire Routing

Before connecting any wires, determine all wire routes to and from the inverter. Conductors passing through walls, bulkheads, or other structural members must be protected to minimize insulation damage, such as chaﬁ ng. During installation, always avoid placing conductors near sources of chaﬁ ng caused by vibration or constant rubbing. Typical routing scenarios are:

• AC input wiring from the main AC panel to the inverter

• AC input wiring from an onboard generator (optional) to the inverter

• DC input wiring from the batteries to the inverter

• AC output wiring from the inverter to the coach’s AC main panel or to dedicated circuits

• Battery Temperature Sensor cable from the inverter to the batteries

• Remote control cable (optional) to the inverter

• Ground wiring to and from the inverter

2.3.4 Torque Requirements

Torque all AC wiring connections to 16 lbf-in (1.8 N-m). Torque DC cable connections from 10 to 12 lbf-ft (13.6 to 16.3 N-m).

Page 10

Installation

2.4 DC Wiring

This section describes the inverter’s required DC wire sizes, the recommended disconnect/ overcurrent protection, and how to make the DC connections to the inverter and the battery bank.

Refer to Figure 2-4 when connecting the DC wires.

WARNING: Even though DC voltage is “low voltage”, signiﬁ cant hazards may be present, particularly from short circuits of the battery system.

CAUTION: The inverter is NOT reverse polarity protected—which means that if the negative and positive battery voltage is connected backwards to the inverter, the inverter will likely be damaged. You should verify the correct voltage polarity using a voltmeter BEFORE connecting the DC wires. Color code the DC cables/wires with colored tape or heat shrink tubing: RED for positive (+), WHITE for negative (–), and GREEN (or bare copper) for DC ground, to avoid polarity problems.

CAUTION: To remove battery power from the inverter, disconnect the battery positive connection before the negative connection. This requirement can prevent damage to the inverter and/or an accessory connected to the inverter.

Note: When an accessory that is not powered by the inverter (e.g., ME-AGS-N and ME-

BMK) is installed and connected to the inverter (via a network communication cable), the battery negative connection of the inverter and each accessory must be at the same potential (i.e., electrically common with each other) until the positive connection of each device is removed. This prevents a high impedance path developing between the connected devices (i.e., inverter and accessories), which can cause the network cable to become the DC return path to the battery—possibly resulting in permanent damage to all connected devices on the network. This can be prevented if the battery negative connection of each device is always connected before connecting/disconnecting any battery positive.

CAUTION: Before wiring the DC cables, review the safety information at the beginning of this manual and the information below to ensure a safe and long-lived system.

• The DC positive and negative cables connected to the inverter from the battery bank should be tied together with wire ties or electrical tape approximately every 6 inches (15.2 cm). This helps improve the surge capability and reduces the effects of inductance, which improves the inverter waveform and reduces the wear of the inverter’s ﬁ lter capacitors.

• Crimped and sealed copper ring terminal lugs with a 5/16” hole should be used to connect the DC wires to the inverter’s DC terminals.

• The battery bank voltage MUST match the DC voltage required by the inverter (i.e., 12-volt battery bank for a 12-volt inverter), or the inverter may be damaged.

• To ensure the maximum performance from the inverter, all connections from the battery bank to the inverter should be minimized. The exceptions are the DC overcurrent disconnect in the positive line, and a shunt in the negative line. Any other additional connection will contribute to additional voltage drops and these extra connection points may loosen during use.

• Check all wiring to the battery terminals periodically (once a month) for proper tightness. The torque requirement for the DC terminals is between 10 to 12 lbf-ft (13.6 to 16.3 N-m). Be aware that overtightening or misthreading the nuts on the DC terminals can cause the bolts to strip and snap/break off.

• Make sure cables have a smooth bend radius and do not become kinked. Long cable runs should follow existing wire runs if possible.

• A brief spark or arc may occur when connecting the battery cables to the inverter DC terminals; this is normal and due to the inverter’s internal capacitors being charged.

Page 11

Installation

BTS

ME-G Series

Inverter/Charger

front view

BTS

Inverter’s DC Negative Connection

Inverter’s DC Positive Connection

Inverter’s Equipment Ground

Wire

Battery Temp Sensor Cable

Battery

Disconnect Switch

Shunt

OFF

Fuse

Battery Bank’s Equipment Ground Wire

Battery Bank’s Negative Cable

Battery Bank’s Positive Cable

12-volt

Battery

Bank

Page 12

Figure 2-4, DC and Battery Temperature Sensor Wiring

Installation

2.4.1 DC Wire Sizing

It is important to use the correct DC wire to achieve maximum efﬁ ciency from the system and to reduce ﬁ re hazards associated with overheating. Always keep your wire runs as short as practical to prevent low voltage shutdowns and to keep the DC breaker from nuisance tripping (or open fuses) because of increased current draw. See Table 2-1 to select the required minimum DC wire size (and corresponding overcurrent device) required based on your inverter model. The cable sizes listed in Table 2-1 are required in order to reduce stress on the inverter, minimize voltage drops, increase system efﬁ ciency, and ensure the inverter’s ability to surge heavy loads.

If the distance from the inverter to the battery bank is >5 feet (1.5m), the DC wire needs to be increased. Longer distances cause an increase in resistance, which affects the performance of the inverter. Use the overcurrent device previously determined from Table 2-1 and then refer to Table 2-2 to determine the minimum DC wire size needed for various distances.

2.4.2 DC Overcurrent Protection

DC overcurrent protection is not included in the inverter—for safety reasons and to comply with electrical code regulations—it must be provided as part of the installation. The DC overcurrent protection device must be installed in the positive DC cable line, it can be a fuse or a circuit breaker, and it must be DC rated. It must be correctly sized according to the size of DC cables being used, which means it is required to open before the cable reaches its maximum current carrying capability, thereby preventing a ﬁ re. The NEC requires both overcurrent protection and a disconnect switch. If a circuit breaker is used as the overcurrent protection device, it can also be used as the required DC disconnect.

If a fuse is used as an overcurrent device, a Class-T type or equivalent is recommended. This fuse type is rated for DC operation, can handle the high short-circuit currents, and has a time delay that allows for momentary current surges from the inverter without opening the fuse. However, because the fuse can be energized from both directions, the NEC requires that it be installed in a manner such that the power must be disconnected on both ends of the fuse before servicing.

Use Table 2-1 to select the DC overcurrent device needed based on the recommended minimum wire size for your particular inverter model (may not meet all local code or NEC requirements).

Table 2-1, Recommended DC Wire/Overcurrent Device for Rated Use

Maximum

Continuous

Current

ME2012-G 267 amps

ME2512-G 333 amps

ME3112-G 413 amps

Note1 – Maximum continuous current is based on the inverter’s continuous power rating at the lowest input voltage with an inverter inefﬁ ciency factored in.

– Copper wire rated with 90°C (194°F) insulation at an ambient temperature of 30°C (86°F), with a

Note

multiple cable ﬁ ll factor (0.8) de-rating (if needed).

Note

– The next larger standard size overcurrent device may be used if the de-rated cable ampacity falls

between the standard overcurrent devices found in the NEC.

– Per the NEC, the DC grounding electrode conductor can be a #6 AWG (33.6 mm2) conductor if

Note

that is the only connection to the grounding electrode and that grounding electrode is a rod, pipe, or plate electrode.

Minimum DC Wire

Size (rating)

#2/0 AWG (67.4 mm2)

300 amps

#4/0 AWG (107.16 mm2)

400 amps

#4/0 AWG (107.16 mm2)

400 amps

In Free Air

Maximum DC

Fuse Size

300 amps with

time delay

400 amps with

time delay

400 amps with

time delay

DC Grounding

Electrode Wire

Size

#6 AWG

(13.3 mm2)

#6 AWG

(13.3 mm2)

#6 AWG

(13.3 mm2)

Page 13

Installation

Table 2-2, DC Wire Size For Increased Distance (in free air)

Minimum Recommended DC Wire Size (one way)*

5 feet or less

(≤1.5 m)

ME2012-G

ME2512-G

ME3112-G

* Copper wire rated with 90°C (194°F) insulation at an ambient temperature of 30°C (86°F)

#2/0 AWG

(67.4 mm

)

#4/0 AWG

(107.16 mm2)

#4/0 AWG

(107.16 mm2)

2.4.3 DC Cable Connections

Do not put anything between the DC cable ring lug and the battery terminal post or the ﬂ at metal part of the inverter’s DC terminal. When connecting the DC cable to the battery or inverter DC terminals, the cable should be placed directly against the inverter or battery terminals. Incorrectly installed hardware causes a high resistance connection, which could lead to poor inverter/charger performance and may melt the cable and terminal connections.

Refer to Figures 2-5 and 2-6 to connect the DC cables and stack the hardware correctly. Tighten the terminal connections from 10 to 12 lbf-ft (13.6 to 16.3 N-m).

CAUTION: The DC terminal and Flange/Kep nuts are made of stainless steel, which has a high likelihood of seizure. To help prevent the bolt and nut from seizing—causing the bolts to strip or snap/break-off—the use of anti-seize lubricant is highly recommended.

5 to 10 feet

(1.5 to 3.1 m)

#4/0 AWG

(107.16 mm2)

#4/0 AWG x2

(107.16 mm2) x2

#4/0 AWG x2

(107.16 mm2) x2

10 to 15 feet

(3.1 to 4.6m)

#4/0 AWG

(107.16 mm2) x2

not recommended

Info: If antioxidant grease or spray is used, apply it after all the connections have been made and are properly tightened.

Info: A 1/2-inch wrench or socket is used to tighten the 5/16 SAE Flange/Kep nuts.

nut

split

washer

battery cable

(with ring lug)

CAUTION :

Ensure nothing is

placed between

the cable ring lug

and the battery post.

battery

post

Battery

Temperature

Sensor

Inverter DC terminal

(5/16 -18" bolt,

5/8" usable length)

battery cable

(with ring lug)

CAUTION:

Ensure nothing is

placed between the DC terminal

and the ring lug.

5/16-18"

Flange or

Kep nut

Figure 2-5, Battery Hardware

Installation

Page 14

Figure 2-6, Inverter DC Hardware

Installation

2.4.4 Wiring the Battery Bank

WARNING: Lethal currents will be present if the positive and negative cables attached

to the battery bank touch each other. During the installation and wiring process, ensure the cable ends are insulated or covered to prevent touching/shorting the cables.

Info: DO NOT connect the DC wires from the battery bank to the inverter until: 1) all DC and AC wiring are completed, 2) the correct DC and AC overcurrent protection has been installed, and 3) the correct DC voltage and polarity have been veriﬁ ed.

Info: For the ME-G Series inverter/charger to perform optimally, a minimum battery bank of 200 AH is recommended for moderate loads (<1000W) and greater than 400 AH for heavy loads (≥1000W).

Depending upon the voltage of the batteries you use in the installation (6 or 12 VDC), the batteries must be wired in series, parallel, or series-parallel to provide the correct voltage (see Appendix B – Battery Information for guidance on wiring batteries together). The interconnecting DC wires must be sized and rated exactly the same as those that are used between the battery bank and the inverter.

Place the batteries as close as practical to the inverter, preferably in an insulated and ventilated enclosure. Allow adequate space above the batteries to access the terminals and vent caps (as applicable). Also, allow at least 1” (2.5 cm) of space between the batteries to provide good air ﬂ ow. DO NOT mount the batteries directly under the inverter.

CAUTION: Install batteries in a well ventilated area. Batteries can produce explosive gases. For compartment/enclosure installations, always vent batteries to the outside.

Info: To ensure the best performance from your inverter system, batteries should be of the same size, type, rating, and age. Do not use old or untested batteries.

2.4.5 Battery Temperature Sensor Installation and Wiring

The Battery Temperature Sensor (Figure 2-7) provides the inverter with precise battery temperature information to automatically adjust the ABSORB and FLOAT charge voltage set points. This allows the batteries to be correctly charged under extreme temperature changes.

If the temperature sensor is NOT installed and the batteries are subjected to large temperature changes, battery life may be shortened.

The BTS cable may be extended—using a RJ11 connector (female to female) and a standard phone cable with RJ11 connectors—to a maximum length of 40 feet (12 m). However, your inverter to battery cable length shouldn’t exceed the recommended distance shown in Table 2-2.

To install the BTS:

1. Attach the ring terminal end of the Battery Temperature Sensor to the negative battery terminal; see Figure 2-5 for proper connection to the battery terminal.

2. Route the sensor’s cable to the inverter following existing wire runs.

3. Connect the RJ11 connector end of the BTS cable to the yellow-labeled BTS Port on the inverter (see Figure 1-1, Item 6).

(~5.1 cm)

~2"

Cable

(~2.54 cm)

~1"

(~1.9 cm)

~¾”

(~1.3 cm)

~½”

FRONT VIEW

Figure 2-7, Battery Temperature Sensor

(~.95 cm)

0.375" diameter

SIDE VIEW

Page 15

Installation

2.4.6 Wiring the Inverter to the Battery Bank

CAUTION: The inverter is NOT reverse polarity protected—if this happens, the inverter

will be damaged and will not be covered under warranty.

wires from the batteries to the inverter, verify the correct battery voltage and polarity using a voltmeter. If the positive terminal of the battery is connected to the negative terminal of the inverter and vice versa, severe damage will result. If necessary, color code the cables (with colored tape): RED for positive (+) and WHITE for negative (–) to avoid polarity confusion.

Info: The DC overcurrent device (e.g., circuit breaker or fuse) must be placed in the positive (red) DC cable line between the inverter’s positive DC terminal and the battery’s positive terminal (red)—as close to the battery as possible.

DC Ground Wire

1. Route an appropriately sized DC grounding wire (green or bare wire) from the inverter’s DC equipment ground terminal (Figure 1-2, Item 7) to a dedicated system ground. Recommended tightening torque is 45 lbf-in (5.1 N-m). Refer to Section 2.6 for grounding information and sizing the DC ground wires.

DC Negative Wire

2. Route an appropriately sized DC negative wire (white) from the negative terminal of the battery bank to the inverter’s negative terminal (Figure 1-2, Item 11).

Info: If installing a battery monitor such as a ME-BMK, install a DC shunt in-line with the negative battery cable.

Before connecting the DC

DC Positive Wire

3. Mount the circuit breaker or fuse assembly as near as practical to the batteries and leave open (i.e., no power to inverter).

WARNING: DO NOT close the DC circuit breaker or connect the fuse to connect battery power to the inverter at this time. This will occur in the Functional Test after the installation is complete.

CAUTION: If connecting live battery cables to the inverter DC terminals, a brief spark or arc may occur; this is normal and due to the inverter’s internal capacitors being charged.

4. Route and connect an appropriately sized DC positive wire (red) from the inverter’s positive DC terminal (Figure 1-2, Item 10) to one end of the circuit breaker (or DC fuse block).

5. Connect a short wire (same rating as the DC wires) to the other side of the DC circuit breaker (or one end of the fuse/disconnect assembly), and the other end of the short wire to the positive terminal of the battery bank (Figure 2-1 for reference). This is essential to ensure even charging and discharging across the entire battery bank.

6. Ensure the DC wire connections (on the batteries, inverter, and DC circuit breaker/fuse lugs) are ﬂ ush on the surface of the DC terminals, and the hardware (lock washer and nut) used to hold these connections are stacked correctly (Figures 2-5 and 2-6). Verify all DC connections are torqued from 10 to 12 lbf-ft (13.6 to 16.3 N-m).

7. Once the DC connections are completely wired and tested, coat the terminals with an approved anti-oxidizing spray.

8. Attach the red and black terminal covers over the inverter’s DC connectors, and then secure them in place with the supplied screws.

9. If the batteries are in an enclosure, perform a ﬁ nal check of the connections to the battery terminals, and then close and secure the battery enclosure.

Page 16

Installation

2.5 AC Wiring

This section provides information on how to make the AC connections to the ME-G inverter using the correct AC wire size and the corresponding overcurrent protection. Refer to Figures 2-9 through 2-12 for visual overviews of the various AC wiring conﬁ gurations.

2.5.1 Pre-AC Wiring Requirements

CAUTION: Before installing any AC wiring, review the safety information at the

beginning of this manual and the following to ensure a safe and long-lived system:

• Always use properly rated circuit breakers. If using an electrical sub-panel, circuit breakers can be moved from the main electrical panel to the sub-panel only if the breakers are also listed to be installed in the sub-panel.

• AC wiring must be no less than #12 AWG (3.3 mm2) gauge copper wire and be approved for the application (i.e., RV or marine wiring).

• DO NOT connect the inverter’s output to an AC power source. This could cause severe damage to the inverter and is not covered under warranty.

• The wire sizes recommended in this manual are based on the ampacities given in Table 310.17 (in free air) of the National Electrical Code. ANSI/NFPA 70, for 90ºC (194ºF) copper wire based on an ambient temperature of 30ºC (86ºF).

WARNING: To reduce the risk of ﬁ re, do not connect this inverter to an AC load center (circuit breaker panel) having multi-wire branch circuits connected.

2.5.2 AC Wire Size and Overcurrent Protection

The AC input and output wiring must be sized per the local electrical safety code requirements to ensure the wire’s ability to safely handle the inverter’s maximum load current. The AC wiring must be protected from short circuits and overloads by an overcurrent protection device and have a means to disconnect the AC circuits. AC overcurrent protection is not included in the inverter and must be provided as part of the inverter installation. The AC overcurrent protection device must be a circuit breaker or a fuse/disconnect and be properly sized and branch circuit rated for the wire it is protecting and the appliances being powered.

Info: When wiring the AC input and output circuits, we highly recommend a full system Inverter Bypass Switch. This simple item provides a convenient way to isolate the inverter for battery maintenance, and it could save you hours of downtime—if you ever need to service your inverter—by enabling you to continue to power your AC loads without any re-wiring. Because we think it is an essential part of an inverter system, every Magnum panel (MMP Series) is equipped with an inverter bypass switch.

When the inverter is in Standby mode, the full AC pass-thru capacity of the MS-G Series inverter/ charger (when wired directly to the inverter’s input and output) is 30 amps1. For a 30-amp passthru capability, a 30-amp duty rated breaker is required, which corresponds to a minimum cable size of #12 AWG (in free air).

CAUTION: The inverter’s internal AC transfer relay contacts are rated for 30 amps (each leg), the pass-thru current for relay contact must be no greater than 30 amps or damage to this relay may occur.

2.5.3 Recommended GFCIs (Ground Fault Circuit Interrupters)

In compliance with UL standards, Sensata has tested the following GFCI s and ﬁ nd that they function properly when connected to the inverter’s AC output:

• Shock Sentry

#VGF15W • Leviton Smart Lock #7899 • Hubbel #GF520EMBKA

Note1 – The AC pass-thru capability to the GFCI is 20 amps.

Page 17

Installation

CAUTION: Ground Fault Circuit Interrupters (GFCIs) shall be installed in the recreational

vehicle wiring system to protect all branch circuits. WARNING: Risk of electric shock. Use only ground-fault circuit interrupters [receptacle(s)

or circuit breaker(s)] that are compatible with your ME-G inverter. Some types may fail to operate properly when connected to this inverter equipment.

2.5.4 AC Terminal Block Connections

The ME-G Series models have a ﬁ ve-pole AC terminal block and one AC ground terminal to connect the inverter’s AC input and output wiring. This terminal block (see Figure 2-8) allows a service/distribution panel (main panel) to be wired to the inverter’s input, and also allows a dedicated panel (sub-panel) between the inverter’s output wiring and the AC loads. To access and view the AC terminal block and ground terminal, remove the two Phillips screws holding the AC wiring access cover plate (Figure 1-3, Item 15).

Each connection on the AC terminal block is rated to accept one #14 to #6 AWG (2.1 to 13.3 mm2) CU stranded wire, or two #12 AWG (3.3 mm2) CU stranded wires. Each connection uses a M3.5 slotted head screw, and the maximum tightening torque is 16 lbf-in (1.8 N-m).

Info: One of the AC wiring conﬁ gurations [SI/SO (50A), Figure 2-11] uses a #6 AWG (13.3 mm2) CU wire to carry 60 amps, and splits to two wires to allow 30 amps for each leg (i.e., AC HOT 1 IN and AC HOT 2 IN). IDEAL Industries Inc. (www.idealindustries. com) manufactures a crimp connector (PN: 412) and a separate insulator (PN: 417) that allow up to two #8 AWG (8.4 mm2) wires, with one #6 AWG (13 mm2) wire to be connected together.

Info: To comply with ABYC requirements for marine installations, the AC terminal has a stainless steel wire protector to prevent wire damage from the set-screw.

Info: The inverter’s NEUT IN and NEUT OUT terminals are electrically isolated from each other while inverting. This is related to the neutral-ground bonding requirement and helps to prevent ground-loops (see Section 2.6.3 for more information).

The AC ground terminal can accept one #14 to #6 AWG (2.1 to 13 mm2) CU stranded wire. It uses a slotted head screw and has a recommended maximum tightening torque of 45 lbf-in (5.1 N-m). For multiple ground wires, use a pressure or mechanical connector to attach the single wire from the AC ground terminal to the input and output ground connections.

HOT 2 OUT

NEUT OUT

HOT 2 IN

HOT 1 IN

NEUT IN

AC GROUND (In & Out)

Page 18

Figure 2-8, AC Terminal Block

Installation

2.5.5 AC Conductor Wiring

The following steps are basic guidelines for installing and connecting the AC wiring to and from all ME-G Series inverters. Before proceeding, refer to Table 2-3 to determine your AC wiring conﬁ guration.

WARNING: Before making any AC connections, make sure the inverter is disconnected from the battery and no AC power is connected to the inverter.

Wiring the Inverter AC Input

1. Remove the two Phillips screws on the AC access cover (see Figure 1-3, Item 15) to access the internal AC terminal block (see Figure 2-8).

2. Route the wires (hot, neutral, and ground) from the AC electrical main panel through one of the strain relief clamps on the inverter (Figure 1-2, Item 8). Tighten the strain relief clamp securely on the wires. Always leave a little extra slack in the wiring.

3. Connect the hot wire (BLACK) from the main panel’s dedicated breaker to the inverter’s AC HOT 1 IN terminal. Tighten the AC HOT 1 IN terminal to 16 lbf-in (1.8 N-m).

Info: You must connect to the HOT 1 IN terminal if you want to use the battery charger.

Info: Depending on the AC wiring conﬁ guration, you may need to connect a wire to the

inverter’s AC HOT 2 IN terminal—refer to your particular conﬁ guration drawing (Figures 2-10 thru 2-12).

4. Connect the neutral (WHITE) from the main panel’s neutral busbar to the inverter’s AC NEUT IN terminal. Tighten the AC NEUT IN terminal to 16 lbf-in (1.8 N-m).

Wiring the Inverter AC Output (Figures 2-10 thru 2-12)

5. Route the wires (hot, neutral, and ground) through the unused strain relief clamp on the inverter (Figure 1-2, Item 8) to the AC electrical sub-panel. Tighten the strain relief clamp securely on the wires.

6. Connect the hot (RED or BLACK) wire from the inverter’s AC HOT 2 OUT terminal to the subpanel’s main breaker. Tighten the AC HOT 2 OUT terminal to 16 lbf-in (1.8 N-m).

7. Connect the neutral (WHITE) from the inverter’s AC NEUT 2 OUT terminal to the sub-panel’s neutral busbar. Tighten the AC NEUT 2 OUT terminal to 16 lbf-in (1.8 N-m).

Wiring the Inverter AC Ground

8. Combine the ground (GREEN) wire from the main panel’s ground busbar and the ground (GREEN) wire from the sub-panel’s ground busbar (if applicable). After these grounds are combined, connect them to the inverter’s AC GROUND terminal. Tighten the AC GROUND terminal to 16 lbf-in (1.8 N-m).

AC Wiring Inspection

1. Verify all wire runs are secured. If installed in a mobile installation, use wire ties or other nonconductive fasteners to prevent chaﬁ ng or damage from movement and vibration.

2. Verify strain reliefs or grommets are in place to prevent damage to the wiring where it passes through walls/bulkheads or other openings.

3. After verifying all AC connections are correct and all inverter AC terminal screws are torqued to 16 lbf-in (1.8 N-m), replace the AC wiring access cover and the covers on the main electrical/ distribution panel.

Page 19

Installation

2.5.6 AC Wiring Conﬁ guration

The following table provides the different wiring conﬁ gurations for installing and connecting the AC conductors to and from the inverter (refer to Figures 2-9 to 2-12 for conﬁ guration diagrams).

Table 2-3, AC Input/Output Wiring Conﬁ gurations

Single In

AC Input

Source

120 VAC @

≤30 amps

Reason to Use Have a 120 VAC

source that is

≤30 amps, and

using the

GFCI outlet to

connect loads).

Appropriate

Models

ME2012-G ME2512-G ME3112-G

Maximum

Input Breaker

30A

(single pole)

Required

–

Minimum Wire

Size

(AWG)

–

#10 AWG

(In)

SI/SO Single In/ Single Out

(≤ 30A)

120 VAC @

≤30 amps

Have a 120 VAC

source that is

≤30 amps.

Requires a

separate inverter

sub-panel. ME2012-G

ME2512-G ME3112-G

30A

(single pole)

–

#10 AWG In

(split into two

#10 AWG for

HOT 1 &

HOT 2 IN)

SI/SO

Single In/

Single Out

(≤ 50A)

120 VAC @

>30 amps

(60 amps max.)

Have a 120 VAC

source that is

>30 amps.

Requires a

separate inverter

sub-panel. ME2012-G

ME2512-G ME3112-G

60A

(single pole)

–

#6 AWG In

(split into two

#10 AWG for

HOT 1 &

HOT 2 IN)

DI/SO

Dual In/

Single Out

120/240 VAC (or

2 separate legs

120 VAC)

@ ≤30 amps/leg

Want dedicated pass-thru while

AC source is on.

Requires a

separate inverter

sub-panel. ME2012-G

ME2512-G ME3112-G

30A

(dual pole)

–

#10 AWG

(In & Out)

Maximum

2400W

#10 AWG

(HOT 2 OUT)

3600W

#10 AWG

(HOT 2 OUT)

6000W

Inverter Pass-

thru capacity

–

Output

Conﬁ gurations

20A @ 120 VAC

30A @ 120 VAC

= 3600W

(HOT 2 OUT)

20A @ 120 VAC

30A @ 120 VAC

(HOT 2 OUT)

and

20A @ 120 VAC

(GFCI outlet)

30A @ 120 VAC

(HOT 2 OUT)

20A @ 120 VAC

(GFCI outlet)

= 2400W

(GFCI outlet)

Wiring

Diagram

Note

: AC source is from either the utility/grid power (i.e., shorepower) or an AC generator.

Note

: If two legs of 30A @ 120 VAC are used, they must be from the same source (i.e., have a common

neutral). For example, 2 legs from a 3-phase source can be used.

Page 20

Figure 2-9 Figure 2-10 Figure 2-11 Figure 2-12

–

and

GFCI

Installation

AC Terminal Block

(AC input and output wiring)

SINGLE IN

(fr om main p anel)

AC HOT 1 IN

AC NEUT IN

AC GROUNDS

(fr om main

panel)

In mobile installations: neut ral is typic a lly not

conn ec te d to gr ound in ma in pane l.

OFF

Main Panel

(Utility/Generator Input)

ME-G Series Inverter

..Maximum..

30- a m p break e r

(singl e pole)

required to

invert er A C inpu t

Figure 2-9, AC Wiring for a Single In Conﬁ guration

Page 21

Installation

AC Terminal Block

(AC input and output wiring)

SI/SO wiring (≤ 30A)

(fr om mai n pan el)

AC HOT 2 OUT

AC NEUT 2

AC HOT 2 IN

OUT

(fr om mai n pan el)

AC HOT 1 IN

AC NEUT IN

(fr om mai n pan el,

to outlet)

ME-G Series

Inverter

AC GROUNDS

GFCI

See NOTE below

OFF

Maximum 30-amp breaker

(singl e pole) required to

invert er A C inpu t

NOTE: In mobile installations, the

OFF

neutr al is typically not connected to

grou nd in main pane l.

120

VAC

Main Panel

(Utility/Generator Input)

Sub-Panel and Outlets

(Inverter Loads)

Figure 2-10, AC Wiring for Single In – Single Out (30A) Conﬁ guration

Page 22

AC Terminal Block

(AC input and output wiring)

SI/SO wiring (≤ 50A)

(fr om mai n pan el)

AC NEUT 2

OUT

AC HOT 2 IN

(fr om main pan el)

AC HOT 2 OUT

(fr om mai n pan el)

AC HOT 1 IN

AC NEUT IN

(fr om mai n pan el,

AC GROUNDS

to outlet)

Installation

ME-G Series

Inverter

GFCI

See NOTE below

OFF

Maximum 60-amp breaker

(singl e po l e) r equi red to

invert er A C inpu t

NOTE: In mobile installations, the

OFF

neutr al is typically not conn ected to

grou nd in main pane l.

120

VAC

120

VAC

Main Panel

(Utility/Generator Input)

Sub-Panel and Outlets

(Inverter Loads)

Figure 2-11, AC Wiring for a Single In – Single Out (50A) Conﬁ guration

Page 23

Installation

AC Terminal Block

(AC input and output wiring)

DUAL IN/SINGLE OUT wiring

(fr om mai n panel)

AC NEUT 2

OUT

AC HOT 2 IN

(fr om mai n pan el)

AC HOT 2 OUT

(fr om mai n pan el)

AC HOT 1 IN

AC NEUT IN

(fr om mai n pan el,

AC GROUNDS

to outlet)

ME-G Series

Inverter

GFCI

See NOTE below

OFF

Main Panel

(Utility/Generator Input)

Maximum 30 -amp breaker

(double pole) required to

invert er A C input

NOTE: In mobile installations, the

neutr al is typically not conn ected to

grou nd in main panel.

OFF

120

VAC

Sub-Panel and Outlet

(Inverter Loads)

Page 24

Figure 2-12, AC Wiring for a Dual In – Single Out Conﬁ guration

Installation

2.6 Grounding Inverters

The inverter/charger should always be connected to a permanent, grounded wiring system. An inverter system that is properly grounded will limit the risk of electrical shock, reduce radio frequency noise from the inverter, and minimize excessive surge voltages induced by lightning. This is done by ensuring there is a well-deﬁ ned, very low-resistance path from the electrical system to the grounding system. This low-resistance path helps stabilize the electrical system voltage with respect to ground and carries fault currents directly to ground if the electrical system malfunctions.

The ME-G Series inverter/charger uses both AC and DC power. However, the AC electrical system is isolated from the DC electrical system by an internal transformer. Although this inverter/charger has two electrical systems, each electrical system must be properly grounded and connected to a common point.

For proper grounding, each electrical system must connect all exposed metal parts of equipment and one of the current carrying conductors together at a common point. This common point of each electrical system is then connected to the common ground reference. This connection to the common ground reference should only be made at one point in each electrical system; otherwise, parallel paths will exist for the currents to ﬂ ow. These parallel current paths would represent a safety hazard and are not allowed in installations wired per the NEC/CEC.

2.6.1 Equipment Grounding

The inverter case and all other non-current carrying exposed metal surfaces in the entire electrical system that may be accidentally energized must be grounded. The equipment-grounding conductor must be sized to safely carry the maximum ground-fault current likely to be imposed on it from where a ground-fault may occur. In accordance with the NEC, use Table 2-4 to size the equipment-grounding conductors. This table requires that the equipment-grounding conductor be sized according to the rating of the overcurrent device protecting the circuit.

CAUTION: The connections and wiring for the equipment-grounding conductor must be continuous to allow fault currents to properly operate overcurrent devices. Where equipment is removed and this disconnects the bonding connection between the grounding electrode conductor and exposed conducting surfaces, a bonding jumper must be installed while the equipment is removed.

AC Side – Where the AC output from the inverter is connected to an AC load center, there should be an equipment grounding conductor connected between the inverter case and the grounding point in the AC load center. The AC equipment grounding conductor is sized per Table 2-4, and is connected to the inverter’s AC equipment grounding terminal as shown in Figure 2-8.

DC Side – Since the currents on the DC side are higher than the AC side (10 times at 12 volts), the equipment grounding needs are different. The DC equipment grounding conductor is sized per Table 2-4, and connected to the DC equipment grounding terminal on the inverter as shown in Figure 2-15.

Table 2-4, Equipment Grounding Conductor Sizing

Rating of Overcurrent

30-60 amp #10 AWG (5.3 mm2)

Minimum Size of

Device

15 amp #14 AWG (2.1 mm2) 20 amp #12 AWG (3.3 mm2)

100 amp #8 AWG (8.4 mm2) 200 amp #6 AWG (13.3 mm2) 300 amp #4 AWG (21.1 mm2) 400 amp #3 AWG (26.6 mm2)

Copper Ground Wire

Page 25

Installation

2.6.2 Grounding on Boats

When installing the ME-G Series inverter/charger on a boat, there are several considerations that must be followed when grounding to ensure a safe installation, prevent galvanic corrosion, and adhere to American Boat and Yacht Council (ABYC) standards.

Ensure a Safe Ground Connection

When AC on the boat is being supplied by shorepower (also referred to as “utility power”), the onboard neutral should be connected to safety ground on the dock. Consequently, neutral and safety ground should not be connected anywhere on the boat when shorepower is present. When AC on the boat is being supplied by the ME-G Series inverter, the inverter’s output neutral is connected to safety ground through an internal relay using its neutral-to-ground connection (see Figure 2-13).

The DC ground terminal on the ME-G Series must also be connected to the boat’s safety ground bus. This ensures that both the inverter’s AC and DC ground terminals are connected to the boat’s safety ground bus as a safety measure to provide protection against faults, and to provide a path for AC fault currents while the boat is connected to shorepower.

Preventing the Risk of Corrosion

The inverter’s AC and DC ground terminals must be connected to the boat’s safety ground to provide an important safety feature. However, this ground connection introduces the risk of galvanic corrosion and/or electrolysis of the boat’s underwater metallic hardware.

Two possible solutions are typically used to maintain the correct onboard grounding requirements while greatly reducing (if not eliminating) the risk of galvanic corrosion. These solutions would be either using a galvanic isolator or an onboard isolation transformer.

Galvanic isolators allow high AC voltage faults to pass, but block low voltage corrosion/electrolysis currents from conducting.

Marine isolation transformers allow the shorepower to be connected to one side of the transformer, and the boat’s AC wiring system is connected to the other side. Since transformers do not allow DC currents to pass, the problem with galvanic corrosion is eliminated.

ABYC Inverter/Charger Grounding Requirements

• DC Grounding Connections:

1) The DC grounding conductor (equipment ground) shall be: a) connected from the metallic case or chassis of the inverter/charger to the engine

negative terminal or its bus, b) of an ampacity equal to that of the DC positive conductor (under certain conditions,

this conductor may be one size smaller—refer the ABYC standard).

2) The inverter/charger’s negative battery terminal and DC grounded conductor (negative

cable) shall not be connected to the inverter case or chassis at the inverter/charger itself.

• AC Grounding Connections:

1) The AC grounding conductor (green) shall be connected to the inverter/charger in a manner

so that the AC ground connection will not be disconnected in servicing. This conductor is in addition to and independent of the DC grounding conductor.

2) The neutral for AC power sources shall be grounded only at the following points: a) the shorepower neutral is grounded only through the shorepower cable and not

grounded on board the boat, b) the inverter neutral shall be grounded at the inverter and the output neutral shall be

disconnected from ground when the inverter is operating in charger/pass-through mode, c) on systems using an isolation transformer or a polarization transformer, the inverter

neutral (and the transformer secondary neutral) may be grounded at the AC main grounding bus instead of at the inverter.

Note

: See the ABYC standard for complete AC/DC grounding requirements.

Page 26

Installation

2.6.3 Neutral to Safety Ground Bonding

The recommended standards for safely wiring mobile and marine installations require that the neutral and safety ground be connected at the AC source; whether it is an inverter, utility power, or a generator. This is to establish a speciﬁ cation that maximizes the possibility that a circuit breaker will activate if a hot-wire-to-ground fault occurs. These standards also require that the AC neutral be connected to safety ground (often called a “bond”) in one, and only one, place at any time. The single bond is established in order to make the electrical panel’s neutral line safe, by connecting it to ground. Without this bond, the neutral can have up to 60 VAC with respect to ground. On the other hand, if more than one bond is established, currents can circulate between neutral and ground and cause “ground-loop” currents. These ground-loops can trip GFCIs, cause an electric shock hazard, and may be the reason for other annoying side effects.

In applications where you are using an inverter as one of your AC sources along with another AC source (e.g., utility power or generator) there is the potential of having multiple connections (bonds) between neutral and ground. Therefore, you must ensure that the inverter does not also connect the neutral-to-ground while the other AC source is actively powering the inverter loads. This can be prevented if your inverter is equipped with automatic neutral-to-ground switching.

WARNING: In most electrical systems, the neutral-to-ground bond is located in the main utility power service entrance panel. Remove any bond downstream from the inverter to prevent multiple bonds. If there is an inverter sub-panel—separate from a main electrical panel—it should have a removable wire that allows the neutral bus to be unbonded from the ground busbar.

All ME-G Series inverter/chargers have automatic neutral-to-ground switching to speciﬁ cally work in multiple source applications. The ME-G Series inverters use an internal relay that automatically connects the AC neutral output terminal to the vehicle/boat’s ground while inverting (Inverter mode) to provide the neutral-to-ground bond; as shown in Figure 2-13. However, when an external AC source (e.g., utility power or a generator) is connected, another neutral-to-ground connection is introduced in the system. When the ME-G Series is connected to this external AC source and goes into Standby mode, the internal relay automatically opens the neutral-to-ground connection, as shown in Figure 2-14. This design keeps two neutral-to-ground connections from occurring at the same time, thereby preventing an electrical shock hazard between the vehicle/ boat’s neutral and the external AC source’s neutral.

Inside ME-G Series

(Inverter Mode)

Neu-Gnd Relay

(K1)

NEUT IN

GROUND

Figure 2-13, Neutral-to-Ground

Connection (Inverter Mode)

NEUT OUT

Inside ME-G Series

(Standby Mode)

NEUT IN

GROUND

Neu-Gnd Relay

(K1)

NEUT OUT

Figure 2-14, Neutral-to-Ground

Connection (Standby Mode)

Page 27

Installation

2.6.4 Connecting a Large DC Ground Wire

Marine installations require the DC ground wire to be the same size or one size smaller than the negative cable. Use the following steps to allow a larger ground wire to be connected.

WARNING: Fire and Shock Hazard – disconnect all AC and DC sources before working in the AC wiring compartment.

1. Remove the inverter’s AC access cover plate (see Figure 1-3, Item 15).

2. Locate the DC Equipment Ground Terminal (see Figure 1-2, Item 7).

3. Within the AC wiring area, locate the hex nut on the backside of the DC ground terminal. Use a 7/16” wrench/nut driver to remove the hex nut, bolt, lock washer and DC ground terminal.

4. Reverse the removed bolt, and place it back in the chassis hole. Attach a correctly sized ground cable with a ring terminal to the ME-G chassis—as shown in Figure 2-15.

Note: Ring terminal must have a hole size ≥1/4”.

5. Place the washer and nut on the bolt—over the ground cable—and securely tighten the nut [from 4 to 5 lbf-ft (5.4 to 6.8 N-m)]. Replace the AC access cover plate.

Figure 2-15, Connecting a Large DC

Ground Wire

DC ground

terminal bolt/

nut, reversed

and tightened

2.7 Inverter Notiﬁ cation Requirements

A warning label as shown in Figure 2-16 is provided to inform all personnel that an inverter is installed in your electrical system. Afﬁ x this label in a clearly visible location at the electrical panel that is being powered by the inverter. This is because it might be falsely assumed that the panel is no longer “hot” after the AC power has been shut off, when power may actually still be available due to the inverter automatically powering the panel.

This electrical system is equipped with an Automatic Generator Starting (AGS) device and/or an inverter. Disconnect all AC and DC power to the AGS and/or inverter before performing any service to the electrical system. Failure to do so can result in shock causing serious injury or death.

PN: 62-0002 Rev A

Figure 2-16, Warning Label

2.8 Final Inspection

1. Verify all cable runs are secured with wire ties or other non-conductive fasteners to prevent chaﬁ ng, or damage from movement and vibration.

2. Verify strain reliefs or grommets are in place to prevent damage to the wiring where it passes through walls, bulkheads, or other openings.

3. Verify all AC connections are correct and torqued to a maximum of 16 lbf-in (1.8 N-m).

4. Replace the covers on the main electrical/distribution panel.

5. Replace the chassis access cover.

6. Verify the inverter’s front panel switch is in the OFF position.

Page 28

Installation

Important: If required by code, have the installation inspected by an electrical inspector.

2.9 Functional Test

After all electrical connections to the inverter, batteries, AC source, and sub-panel have been completed, follow these steps to test the installation and the inverter operation.

CAUTION: Use a multimeter to verify the correct DC voltage for your particular inverter model (i.e., 12-volt battery bank for a 12-volt inverter) and to ensure the polarity of the battery voltage is correct (battery positive connected to the inverter positive terminal and battery negative connected to the inverter negative terminal).

1. Apply battery power to the inverter by closing the DC circuit breaker. The inverter will remain OFF, but the green status indicator on the front of the inverter will quickly blink once to indicate that DC power has been connected and the inverter is ready to be turned on.

2. Prior to turning on the inverter, make sure all AC loads (e.g., appliances) are NOT connected to the inverter’s output or any AC outlets powered by the inverter.

3. Lightly press and release the inverter’s ON/OFF switch to turn the inverter on. Verify the inverter’s status indicator is blinking—indicating the inverter is on.

4. Connect a 10-25 watt light bulb to the inverter output and verify it comes on and shines normally. DO NOT connect anything larger than a 25-watt light bulb until all wiring and voltages are conﬁ rmed to be correct.

Info: The inverter’s AC output voltage will not be correct until a load greater than 5 watts (default setting) is connected to the inverter; or, when the Search mode is turned off with a remote display (ME-RC50 or ME-ARC). A 10-25 watt light bulb is used as it is a sufﬁ cient load to bring the inverter out of Search mode and up to full voltage.

5. Check the AC output voltage of the inverter by connecting an AC voltmeter to the output terminals (see Figure 2-17) and verify the correct output voltages.

6. Press and release the inverter’s ON/OFF switch to turn the inverter off. The inverter’s status indicator and the connected load should go off.

7. Apply AC power to the inverter’s AC input. After the AC input power is qualiﬁ ed (approx. 15 secs), the incoming AC power transfers through the inverter to the inverter’s AC output and powers the light bulb. Verify that the inverter’s status indicator and the light bulb come on.

8. Even though the light bulb is on, the inverter is currently disabled (off). Press and release the ON/OFF switch on the inverter to enable (turn-on) the inverter.

9. Disconnect the incoming AC power to the inverter. Verify the light bulb remains on and is now powered by the inverter.

If the inverter passes all the previous steps, the inverter is ready for use. If the inverter fails any of the steps, refer to the Troubleshooting section.

AC Output

120 Vac

(± 5%)

Neutral to

Ground

< 0.5 Vac

Figure 2-17, ME-G Series AC Voltage Checks

AC Terminal Block

Note: For ease of viewing,

GFCI not pictured.

3020

Page 29

Operation

3.0 Operation

The ME-G Series inverter has two normal operating routines: Inverter mode, which powers your loads using the batteries; and Standby mode, which transfers the incoming AC power (e.g., utility power or a generator) to power your loads and to recharge the batteries. The ME-G Series also includes an extensive protection circuitry to shut down the inverter under certain fault conditions.

3.1 Inverter Mode

When the ME-G Series is ﬁ rst powered up, it defaults to the OFF mode. The momentary ON/OFF

power switch (Figure 1-1, Item 1) must be lightly pressed to turn the inverter on. Subsequently, pressing this switch alternately turns the inverter off and on.

Inverter OFF – When the inverter is off, no power is used from the batteries to power the AC loads, and the status LED will be off. If AC power from an external source (utility or generator) is connected and qualiﬁ ed on the inverter’s AC input, this AC input power passes through the inverter to power the AC loads. However, if this AC power is lost, the AC loads no longer powered because the inverter is off.

When the inverter is turned on, it operates either by “searching” or “inverting”, depending on the connected AC loads.

Searching – When the inverter is ﬁ rst turned on, the automatic Search feature is enabled. This feature conserves battery power when AC power is not required. In this mode, the inverter pulses the AC output looking for an AC load (e.g., electrical appliance). Whenever an AC load (greater than 5 watts) is turned on, the inverter recognizes the need for power and automatically starts inverting. When there is no load (or less than 5 watts) detected, the inverter automatically goes back into Search mode to minimize energy consumption from the battery bank. When the inverter is searching, the inverter’s green LED ﬂ ashes (medium ﬂ ash – blinks once every second).

Info: The factory default value for the Search feature is 5 watts. It can be turned off or adjusted from 5 to 50 watts using a remote display.

Inverting – When a load greater than 5 watts is connected to the inverter output, the ME-G

Series inverts the DC power from the battery and supplies 120 VAC power to the inverter’s GFCI outlet (and to sub-panel, if connected). The inverter’s green LED ﬂ ashes once every second

(medium ﬂ ash) to indicate it is inverting. The amount of time the inverter can be inverting and providing power is directly related to the amount of AC loads that are connected, and the capacity of the battery bank. Refer to Figure 3-1 to see the ﬂ ow of power from the DC input to the AC output while in Inverter mode.

OUT

120

VAC

GFCI

120 VAC

OUTPUT

AC HOT 2 IN

AC HOT 1 IN

AC NEU IN

AC GROUND

DC NEGATIVE

INPUT

(30A)

AC Hot

Transfer Relay

AC HOT 2 OUT

GFCI (20A)

AC NEU OUT

Neutral-Ground

Transfer Relay

DC POSITIVE

FET Bridge

Power Transform er

Figure 3-1, Power Flow – Inverter Mode

Operation

3.2 Standby Mode

The ME-G Series features an automatic transfer relay and an internal battery charger when operating in Standby mode. Standby mode begins whenever AC power (utility or generator) is connected to the inverter’s AC input. Once the AC voltage and frequency of the incoming AC power is within the AC input limits, the automatic AC transfer relay is activated. This transfer relay passes the incoming AC power through the inverter to power the AC loads on the inverter’s output. This incoming power is also used to activate a powerful internal battery charger to keep the battery bank charged in case of a power failure. Refer to Figure 3-2 to see the ﬂ ow of power from the AC input to the DC and AC output while in Standby mode.

OUT

120

VAC

GFCI 120 VAC OUTPUT

120

VAC

OUT

240

VAC

120

VAC

AC HOT 2 IN

AC HOT 1 IN

AC NEU IN

AC GROUND

DC NEGATIVE

DC POSITIVE

INPUT

(30A)

AC Hot

Transfer Relay

FET Bridge

GFCI

AC HOT 2 OUT

(20A)

AC NEU OUT

Neutral-Ground

Transfer Relay

Power Transform er

Figure 3-2, Power Flow – Standby Mode

3.3 Battery Charging

The ME-G Series is equipped with a PFC (Power Factor Corrected) and PI (Proportional-Integral) multi-stage battery charger. The PFC feature controls the amount of power used to charge the batteries to obtain a power factor as close as possible to 1 (or unity). This causes the battery charger to look like a resistor to the line (forces the charge current wave shape to mirror the voltage wave shape). The PI feature allows the charger voltage and current to change independently. These two features maximize the real power available from the AC power source (i.e., utility or generator), which translates into less power wasted and increased charging capabilities.

When an AC source is connected to the AC input, the inverter begins monitoring for acceptable AC voltage. Once the AC voltage is accepted, the AC transfer relay closes and the Charge mode begins. After Charge mode begins, the inverter’s battery voltage is monitored to determine the charging stage. If the battery voltage is low (≤12.8 VDC), the charger begins bulk charging. If the DC voltage is high (>12.8 VDC), the charger will skip the Bulk and Absorb charge stages and go directly to Float charging. However, if the incoming AC power is lost and returns within 2 minutes the charge mode returns to the charge stage it was in prior to losing AC input—regardless of the battery voltage.

The multi-stage charger in the ME-G Series can use up to ﬁ ve different charging stages to help monitor and keep the batteries healthy. The ﬁ ve stages include an automatic 4-stage charging process (Figure 3-3)—Bulk, Absorb, Float, and Full Charge—and a manual Equalization (EQ) charge stage. The automatic 4-stage charge process provides complete recharging and monitoring of the batteries without damage due to overcharging. The EQ stage (requires a remote control to enable) can be used to stir up stratiﬁ ed electrolyte and to reverse any battery plate sulfation that may have occurred—if recommended by your battery’s manufacturer.

Page 31

Operation

While charging, the unit may go into charger back-off protection, which automatically reduces the charge current to the batteries. This is caused by: 1) The internal temperature is too hot— the charger automatically reduces the charge rate to maintain temperature; or, 2) The AC input voltage falls below 90 VAC—the charger stops charging to help stabilize the incoming AC voltage.

The Charge mode provides up to four separate charging stages: Bulk Charging, Absorb Charging, Float Charging, and Full Charge (see Figure 3-3).

Bulk Charging: This is the initial stage of charging. While bulk charging, the charger supplies the battery with constant current. The charger will remain in bulk charge until the absorption charge voltage (determined by the Battery Type selection*) is achieved. The inverter’s green LED stays ON (solid) to indicate bulk charging.

Absorb Charging: This is the second charging stage and begins after the absorb voltage has been reached. Absorb charging provides the batteries with a constant voltage and reduces the DC charging current in order to maintain the absorb voltage setting. The inverter’s green LED ﬂ ashes once every second (medium ﬂ ash) to indicate absorption charging for 2 hours (determined by the Battery AmpHrs selection*), then switches to ﬂ oat charging.

Float Charging: The third charging stage occurs at the end of the absorb charging time. While ﬂ oat charging, the charge voltage is reduced to the ﬂ oat charge voltage (determined by the Battery Type selection*). In this stage, the batteries are kept fully charged and ready if needed by the inverter. The inverter’s green LED ﬂ ashes once every 8 seconds (slow ﬂ ash) to indicate ﬂ oat charging. The Float Charging stage reduces battery gassing, minimizes watering requirements (for ﬂ ooded batteries), and ensures the batteries are maintained at optimum capacity.

Full Charge (Battery Saver™ mode): The fourth stage occurs after four hours in the Float Charging stage. The Full Charge stage is designed to keep batteries fully charged over long periods, and to prevent excessive loss of water in ﬂ ooded batteries or drying out of GEL/AGM batteries. In this stage, the charger is turned off and begins monitoring the battery voltage; if the battery voltage drops low (12.7 VDC or less), the charger automatically initiates another four hours in ﬂ oat charge.

Info: If the battery voltage falls to the re-bulk voltage (12.1 VDC) or lower, the unit will begin another bulk charge.

* These settings in the ME-G Series are changeable and leave the factory with default values (see Table 3-2, Inverter/Charger Default Values). These default values are adequate for most installations, however, if you determine that some of the values need to be changed for your particular system, a remote control may be purchased to adjust these settings.

Absorb

Charging

Absorb

volts

Constant

Voltage

Absorb

Time

Reduced

Current

Float

Charging

Float volts

Reduced

Voltage

Monitored

Current

Full

Charge

Monitored

Voltage

Goes to Full

Charge after

4 hours in

Float Charge

No Current

Voltage

Time

Current

Bulk

Charging

Increased

Voltage

Max

Charge

Rate

Constant

Current

Figure 3-3, Automatic 4-Stage Charging Graph

Operation

3.4 Transfer Time

While in Standby mode, the AC input is continually monitored. Whenever AC power falls below the VAC dropout voltage (80 VAC, default setting), the inverter automatically transfers back to Inverter mode with minimum interruption to your appliances—as long as the inverter is turned on. The transfer from Standby mode to Inverter mode occurs in approximately 16 milliseconds. While the ME-G Series is not designed as a computer UPS system, this transfer time is usually fast enough to hold them up. However, the VAC dropout setting has an effect on the ability of the loads to transfer without resetting. The lower this setting, the longer the effective transfer will be and therefore, the higher the probability for the output loads to reset. This occurs because the incoming AC voltage is allowed to fall to a level that is so low that when the transfer does occur, the voltage on the inverter’s output has already fallen low enough to reset the loads.

The disadvantage of a higher VAC Dropout setting is that smaller generators (or large generators with an unstable output) may nuisance transfer. This commonly happens when powering loads that are larger than the generator can handle—causing the generator’s output voltage to constantly fall below the inverter’s input VAC dropout threshold.

Info: When switching from Inverter mode to Standby mode, the inverter waits approximately 15 seconds to ensure the AC source is stable before transferring.

3.5 Battery Temperature Sensor Operation

The plug-in Battery Temperature Sensor (BTS) is used to determine the battery’s temperature. This information allows the multi-stage battery charger to automatically adjust the battery charge voltages for optimum charging performance and longer battery life.

If the temperature around an installed BTS is below 77°F (25°C), the absorb and ﬂ oat charge voltages increase. If the temperature around the BTS is higher than 77°F (25°C), the absorb and ﬂ oat charge voltages decrease. See Figure 3-4 to determine how much the charge voltage changes (increases or decreases) depending on the temperature reading of the BTS. For example, the nominal absorb charge voltage for a ﬂ ooded battery at 77°F (25°C) on a 12-volt model is

14.6 VDC. If the battery temperature is 95°F (35°C), the absorb charge voltage would decrease to 14.3 VDC (14.6 VDC – 0.3 change).

If the temperature sensor is NOT installed, the charge voltages will not be automatically adjusted because of temperature, but will be maintained at a temperature of 77°F (25°C). The life of the batteries may be reduced if they are subjected to large temperature changes when the BTS is not installed.

Info: When the BTS is connected, the battery charger uses a value of 5mV/°C/Cell from 0-50°C to change the charge voltage based on temperature.

12VDC units

0.75

+0.75V

0.6

+0.6V

0.45

+0.45V

0.3

+0.3V

+0.15V

0.15

No Change

-0.15

-0.15V

-0.3V

-0.3

-0.45V

-0.45

-0.6

-0.6V

-0.75V

-0.75

Change to battery charging voltage

Figure 3-4, BTS Temperature to Charge Voltage Change

Temperature Compensation using BTS

no BTS

connected

0 5 10 15 20 25 30 35 40 45 50

32F5C41F

10C 50F

15C 59F

20C 68F

25C 77F

30C 86F

Temperature reading from BTS

35C 95F

40C

104F

45C

113F

50C

122F

Page 33

Operation

3.6 Protection Circuitry Operation

The inverter is protected against fault conditions, and in normal usage it will be rare to see any. However, if a condition occurs that is outside the inverter’s normal operating parameters, it will shut down and attempt to protect itself, the battery bank, and your AC loads. If there is a condition that causes the inverter to shut down, it may be one of the following [also refer to the Troubleshooting section (Section 4.3) to help diagnose and clear the fault condition]:

• Low Battery – The inverter shuts off whenever the battery voltage falls to the LBCO (Low Battery Cut Out) level—to protect the batteries from being over-discharged. After the inverter has reached the LBCO level and turns off, it automatically restarts after one of the following conditions are met:

1. AC power is applied and the inverter begins operating as a battery charger.

2. Battery voltage rises to the LBCI (Low Battery Cut In) level. Refer to Table 3-1 to determine the LBCO and LBCI levels for your inverter model.

• High Battery – In the event the battery voltage approaches the HBCO (High Battery Cut Out) level, the inverter automatically shuts down to prevent it from supplying unregulated AC output voltage. The inverter’s status LED turns off when a high battery fault condition occurs. The inverter automatically restarts when the battery falls to the HBCI (High Battery Cut In) level. Refer to Table 3-1 to determine the HBCO and HBCI levels for your inverter.

Info: High battery voltage may be caused by excessive or unregulated voltage from external charging sources.

• Overload – During inverter and standby operation, the inverter monitors the DC and AC current levels. In the event of a short-circuit or an overload condition for more than a few seconds, the inverter shuts down. To start operating after this fault, the inverter would need to be restarted (turned back on) after the inverter’s AC loads are reduced/removed.

• Over-temperature – If internal power components begin to exceed their safe operating temperature level, the inverter shuts down to protect itself from damage. The inverter’s status LED turns off to indicate the over-temperature fault condition. The inverter automatically restarts after the unit cools down.

• Internal Fault – The inverter continually monitors several internal components and the processor communications. If a condition occurs that does not allow proper internal operation, the inverter shuts down to protect itself and the connected loads. The inverter needs to be reset to start operating—refer to Section 4.4 for information on resetting the inverter.

Table 3-1, Inverter Battery Turn On/Off Levels

Inverter battery turn

ON/OFF Levels

HBCO >15.8 VDC >15.8 VDC >15.8 VDC

HBCI 15.5 VDC 15.5 VDC 15.5 VDC LBCI ≥12.5 VDC ≥12.5 VDC ≥12.5 VDC

LBCO

(1-minute delay)

LBCO (immediate) 8.5 VDC 8.5 VDC 8.5 VDC

*adjustable from 9.0 to 12.2 VDC with remote control

ME2012-G ME2512-G ME3112-G

10.0 VDC* 10.0 VDC* 10.0 VDC*

Inverter Model

Operation

3.7 Inverter Startup

Power ON/OFF Switch – The inverter can be turned on/off by lightly pressing and releasing

the Power ON/OFF switch on the front (Figure 3-5). When the inverter is ﬁ rst connected to the batteries, or when its automatic protection circuit has turned the inverter off, the ON/OFF switch will need to be pressed to start the unit (or reset per Section 4.4). Once the inverter has been turned on, pressing the Power ON/OFF switch alternately turns the inverter on and off.

WARNING: The Power ON/OFF switch does not turn on or off the charger feature, or remove pass-thru power. If AC power (utility or generator) is connected and qualiﬁ ed on the AC input, this AC power will also be available on the AC output and is not controlled by the ON/OFF switch.

Status LED Indicator – The status indicator is a green LED (Light Emitting Diode) that provides information on the operational mode of the inverter. Watch this indicator (Figure 3-5) for at least 10 seconds to determine the inverter’s operational condition from the information below:

• Off – Indicates the inverter is off—there is no AC power (inverter, utility, or generator) at the inverter’s output terminals. If the LED stays off after pressing the ON/OFF switch, there is a fault condition (such as low battery, high battery, overload, over-temperature or an internal fault). Refer to the Troubleshooting section to help diagnose/clear any fault condition.

• Slow Flash (blinks on for 4 seconds, then off for 4 seconds) – Indicates the batteries are ﬂ oat charging and the inverter is in Standby mode (any external AC power connected to the inverter’s input is passing through the inverter and powering the inverter’s AC loads).

• Medium Flash (blinks on once every second) –

When AC power is not connected to the inverter’s input: Indicates the inverter is on and using energy from the battery. The inverter is either: 1) Inverting – providing full power to the connected loads; or, 2) Searching – conserving power and waiting for a load to be turned on that meets or exceeds the Search Watts parameter (5 watts = default setting). When AC power is connected to the inverter’s input: Indicates absorb charging, and the inverter is in Standby mode (the external AC power that is connected to the inverter’s input is passing through the inverter and is powering the AC loads connected to the inverter’s output).

• Fast Flash (blinks on/off very quickly—ﬂ utters) – Indicates the inverter is in EQ charge mode (requires remote to enable), or the inverter is continuously in reset. If a remote was not used to enable the equalize charge, then the inverter is likely in reset. Refer to the Troubleshooting section to help diagnose/clear the fault condition.

• On (solid) – Indicates bulk charging, and the inverter is in Standby mode (the external AC power that is connected to the inverter’s input is passing through the inverter and is powering the AC loads connected to the inverter’s output).

Figure 3-5, Power Switch and Status Indicator

Power ON/OFF pushbutton switch

Charging/Inverting Status LED indicator

Page 35

Operation

3.8 Factory Default Values

The ME-G Series inverter/charger uses default values for the adjustable settings (Table 3-2) that are adequate for most installations. If the operating parameters need to be changed from the default values, an optional remote control can be used to make those changes. To help you determine if you need a remote, information on the inverter/charger settings that can be changed is provided below. The settings, once programmed, are saved in the remote’s nonvolatile memory and are preserved until changed—even if DC power to the inverter is lost (as long as the remote is connected). For information on the full range of settings for each function in your remote, refer to its owner’s manual at www.Magnum-Dimensions.com.

• Shore Max/Input Amps: This setting ensures the inverter AC loads receive the maximum current available from the utility or generator). When the total current used to power the AC loads and to charge the batteries begins to approach the Shore Max/Input Amps setting, the current that was used for charging the batteries will automatically be reduced.

• Search Watts: This setting allows you to turn off the power-saving Search mode circuitry, or adjust the power level at which the inverter will “wake up” and start inverting.

• LowBattCutOut: This setting determines when the inverter will turn off based on low battery voltage. The inverter turns off automatically after the battery voltage has been below this setting for more than one minute. This protects the batteries from overdischarge and the AC loads from unregulated power (brown-outs).

• Batt AmpHrs/Absorption Time: This setting allows the user to input the battery bank size in amp hours or to set the absorption time—which tells the charger how long to charge the batteries in the Absorb Charge stage.

• Battery Type: Sets the type of batteries being used in the system. This information tells the charger what voltage level to use to charge the batteries.

• Charge Rate: This setting can be used to turn off the charger, limit the amount of current that the charger can use (leaving more current available to power loads), or to ensure small battery banks are not overheated because of a charge rate that is too high.

• VAC Dropout: Sets the minimum AC voltage that must be present on the AC input before the unit transfers from Standby mode to Inverter mode. This protects the AC loads from utility outages and brown-outs.

Using a remote display also provides the following features:

• allows you control to enable an equalize charge for certain battery types

• displays inverter/charger’s operating status

• provides fault information for troubleshooting

Table 3-2, Inverter/Charger Default Values

Adjustable Settings Default Values

Shore Max/Input Amps 30 Amps Search Watts 5 Watts LowBattCutOut Batt AmpHrs/Absorption Time 600 AmpHrs (Absorb Time = 120 minutes)

Battery Type

Charge Rate 100% VAC Dropout 80 VAC

* – These are the ME-G’s default values without a remote control connected. If a remote is connected, the remote settings are saved in the inverter even if the remote is disconnected—until all power to the inverter is removed.

10 VDC (one min. delay), 8.5 VDC (no delay)

Flooded – Liquid Lead Acid:

(Absorb 14.6 VDC, Float 13.4 VDC)

Operation

Figure 3-6, Ground Fault Circuit Interrupter

3.9 Using the GFCI

The GFCI outlet on the left side of the ME-G inverter (Figure 1-3, Item 16) provides auxiliary power to 120 VAC devices that require 20 amps or less. If you are using both GFCI outlets at once, the amperage cannot exceed a total of 20 amps for both devices combined. Use only a 3-prong grounded plug when using the GFCI outlet. Refer to Figure 3-6 for this section.

IMPORTANT: Because GFCI outlets can become damaged over time, they must be tested monthly to ensure they are providing protection. To properly test the GFCI’s operation, the inverter must be providing ~120 VAC to the GFCI outlet. If the inverter is searching, the Search mode feature must be turned off to allow the inverter to provide ~120 VAC.

To test the GFCI outlet:

1. Apply DC power to the inverter, and then turn the inverter on.

2. Plug a test light (small lamp or night light) in to the GFCI outlet and turn it on. If the light comes on, proceed to Step 3. If it does not:

a) Ensure the GFCI’s RESET button is not “tripped” (the RESET button is tripped if the button is ﬂush with the face of the TEST button). If fully pushing the RESET button does not cause the light to come on, then,

b) Ensure the inverter is on and not in Search mode, or c) Check the test light to ensure it is not faulty, or use a different test light.

3. Press the TEST button on the GFCI outlet. The RESET button immediately pops out and the test light turns off. If this occurs, the GFCI accessory is operating correctly. However, if:

a) The RESET button does not pop out when the TEST button is pressed. The GFCI outlet is not operating correctly.

b) The RESET button pops out, but the test light does not turn off. This indicates you need to either:

• check the blue AC HOT 1 OUT wire and the white w/stripe AC NEUT OUT wire inside the inverter to ensure they were not reversed during production, or

• check the HOT IN and NEUT IN wires to ensure they are not reversed from the external AC power source.

To clear a tripped GFCI:

1. Some faults are self-clearing, try resetting the GFCI outlet by pressing the RESET button.

2. If the RESET button will not stay in, ensure the inverter is not in Search mode.

3. If the GFCI outlet continues to trip, the device is performing its intended protection function; which means that a hazardous condition could exist. A qualiﬁ ed electrician should be called to evaluate the circuit.

Page 37

Operation

3.10 Inverter Fan Operation

The inverter contains two internal cooling fans that are automatically controlled. The speed of these fans is determined either by the internal temperature of the inverter or by the load on the inverter. The inverter’s fans will come on under the conditions listed below:

• Fans run full speed if the internal transistors (FETS) or the power transformer reaches 80°C (176°F), or the inverter is running at 100% of its rated load.

• Fans run medium speed if the internal transistors (FETS) or the power transformer reaches 60°C (140°F), or the inverter is running at 50% of its rated load.

• Fans run low speed when the inverter is running at 25% of its rated load.

The fans shut down when none of the above conditions are met, or if the battery voltage is below

9.5V (12-volt systems).

Whenever the inverter is ﬁ rst connected to the battery, the fans will come on for about one second.

Info: The inverter’s fans will not come on based on temperature sensed by the optional Battery Temperature Sensor.

3.11 Using a Remote with the ME-G Series Inverter

The ME-G Series inverter—when connected to a remote control display (i.e., ME-RC, ME-ARC)— has many advanced features. The inverter and remote communicate with each other to allow these advanced features to be set up or enabled. However, the remote may have a later/newer software revision than the inverter, so some of the features and functionality in the remote may not be available with your inverter.

Use the steps below to determine what remote menus/features are available with your inverter:

1. Obtain your inverter’s software revision.

Note: To view the inverter’s software revision level, push the TECH button on your remote and access the Revisions menu.

2. Use the chart below to determine the inverter’s compatibility level (L1, L2, L3 or L4) based on your inverter’s software revision.

Table 3-3, Inverter Compatibility Level

Level 1

(L1)

ME2012-G ≥ Rev 2.6 ≥ Rev 3.6 ≥ Rev 4.2 ≥ Rev 5.4 ME2512-G ≥ Rev 2.6 ≥ Rev 3.6 NA ≥ Rev 5.4 ME3112-G ≥ Rev 2.6 ≥ Rev 3.6 NA ≥ Rev 5.4

3. After determining the inverter’s compatibility level, refer to the remote’s compatibility matrix (ﬁ nd it online at: Magnum-Dimensions.com) to determine which remote features/settings you can use based on your inverter’s compatibility level.

Note: If your inverter’s compatibility level is the same or greater than the ‘Inverter Model/Level Required’ on the remote compatibility matrix on our website, then your inverter can support the device setting/ feature you want. If your inverter does not have the required compatibility level for a feature/setting you want, contact Sensata to determine if there is a software upgrade option for your inverter.

Level 2

(L2)

Level 3

(L3)

Level 4

(4)

Maintenance and Troubleshooting

4.0 Maintenance and Troubleshooting

The following information is provided to help you keep your ME-G Series inverter/charger in optimum operational condition.

4.1 Recommended Inverter and Battery Care

The ME-G Series inverter/charger is designed to provide you with years of trouble-free service. Even though there are no user-serviceable parts, it is recommended that every 6 months you perform the following maintenance steps to ensure optimum performance and extend the life of your batteries.

WARNING: Prior to performing the following checks, switch OFF both the AC and DC circuits.

• Visually inspect the batteries for cracks, leaks, or swelling—replace if necessary

• Use baking soda to clean and remove any electrolyte spills or buildups

• Check and tighten all battery hold down clamps (if applicable)

• Clean and tighten all battery terminals and connecting cables [10 to 12 lbf-ft (13.6 to 16.3 N-m)]

• Check and ﬁ ll battery water levels (liquid lead acid batteries only)

• Check individual battery voltages (load test those that have a voltage difference of more than 0.3 VDC from each other)—replace if necessary

• Check all cable runs for signs of chaﬁ ng—replace if necessary

• Check the inverter’s cooling vents—clean as necessary

• Check and tighten the inverter’s internal AC terminal block connections [16 lbf-in (1.8 N-m)]

4.2 Storage for Mobile Installations

When placing the RV, boat or truck into storage, it is recommended that you perform the following to ensure the system is properly shut down (or properly conﬁ gured for storage). This is especially important for maintaining the batteries.

• Perform the recommended maintenance steps listed in Section 4.1

• Fully charge the batteries

• Connect AC power (if available) and verify the breaker to the inverter’s input is switched ON (to allow battery charging)

• Verify the inverter is switched OFF

• Switch OFF all unnecessary AC and DC loads

• Disable the AGS (if installed) when the RV, boat, or truck is in a conﬁ ned storage area

WARNING: If an AGS were to start and run the generator for an extended period of time in a conﬁ ned area, a potentially fatal level of carbon monoxide (CO) could accumulate.

Page 39

Maintenance and Troubleshooting

4.3 Troubleshooting

Use the chart below to assist in troubleshooting the ME-G Series inverter/charger.

Table 4-1, Basic Troubleshooting

Symptom Possible Cause Recommended Solution

No output power. Inverter LED is OFF.

No output power: a) Green LED is

ﬂ

ashing (x1/sec).

b) Green LED ﬂ ashing rapidly (ﬂ utters).

Low output or surge power when inverting.

Low charging rate when connected to AC power.

Low charging rate when using a generator.

Charger does not charge.

While charging, the DC charge voltage is higher or lower than expected.

Inverter is switched OFF Switch the inverter ON. Battery voltage too low. The battery

voltage level has dropped below the LBCO set-point for more than one minute.

The battery voltage is too high. The inverter automatically resets and resumes operation when the battery voltage drops to the HBCI voltage or lower.

Over-temperature condition: The internal temp of the inverter has risen above acceptable limits; caused by loads too great for the inverter to operate continuously, or by lack of ventilation to the inverter. When unit has cooled, it will automatically reset and resume operation.

AC overload condition: The inverter has turned off because the connected loads are larger than the inverter’s output capacity, or the output wires are shorted.

Internal fault: This fault occurs when an internal fault is detected.

a) Unit is in Search mode, which means load is too small for Search mode circuit detection.

b) Unit is in reset. b) Perform a power or inverter reset is required—

Loose or corroded battery cables. Clean and tighten all cables. Low batteries. Recharge or replace batteries. Loose AC output connections. Tighten AC output connections. Battery cables are the wrong length

or gauge. Charge rate set too low. Adjust charge rate or SHORE settings on remote. Low AC voltage (<90 VAC). Check AC input wiring.

Generator output is too low to power both load and charger.

Loose or corroded battery cables. Clean and tighten battery cables. Defective batteries. Replace batteries. Wrong charger settings. Adjust the charger settings, ensure the unit is not in

Wrong AC input voltage. Verify proper AC input voltage and frequency. If the Battery Temperature Sensor

(BTS) is installed, the DC voltage will increase or decrease depending on the temperature around the BTS.

Check fuses/circuit-breakers and cable connections. Check battery voltage at the inverter’s terminals. Your batteries may need to be charged, this fault condition will automatically clear when the battery voltage exceeds the LBCI voltage.

This condition usually only occurs when an additional charging source (alternator or other external charging source) is used to charge the battery bank. Reduce/ turn off any other charger to the inverter batteries to allow the voltage level to drop.

Reduce the number of electrical loads that you are operating, this will avoid a repeat over-temp shutdown if the cause was too many loads for the ambient conditions.

Check ventilation around the inverter, ensure cool air is available to pass-thru the inverter (refer to the ventilation requirements in Section 2.1.3).

Reduce the AC loads connected to the inverter, or remove all AC output wiring and restart the inverter.

To clear this fault, a power or inverter reset is required—see Section 4.4. If this fault does not clear or returns, the unit will need servicing.

a) Turn on a load greater than 5 watts to bring inverter out of search, or turn off search with remote.

see Section 4.4. If fault continues, the unit needs servicing.

Verify recommended cable lengths and gauges from the manual. Replace cables as necessary.

Reduce the load, increase the generator’s RPMs.

Check the SHORE settings (if remote connected).

charger standby.

This is normal; see Section 3.5 (Battery Temperature Sensor Operation) for more information.

Maintenance and Troubleshooting

4.4 Resetting the Inverter

Under some fault conditions (e.g., an internal fault), the inverter will need to be reset. Prior to performing any reset, ensure all AC power (utility, generator, shorepower) is removed from the inverter’s input.

CAUTION: If AC is connected while performing an inverter reset, damage may occur.

4.4.1 Performing an Inverter Reset (i.e., soft reset)

To perform an inverter reset (also known as a “soft reset”):

1. Press and hold the Power ON/OFF pushbutton (see Figure 4-1) for approximately ﬁ fteen (15) seconds until the Charging/Inverting Status LED comes on and ﬂ ashes rapidly.

2. Once the rapid ﬂ ashing has begun, release the Power ON/OFF pushbutton. The Status LED will go off after the pushbutton is released.

3. After the inverter reset is completed, press the ON/OFF pushbutton to turn the inverter ON.

If the inverter reset fails, you will need to perform a power reset using the procedure below in Section 4.4.2. In either case, if an internal fault does not clear, the inverter will require repair at an Authorized Service Center (ASC).

Info: The Power ON/OFF pushbutton is a small momentary type switch which operates by lightly pressing and releasing. Be careful not to apply too much force when pushing or the switch might break.

1. Press and hold the Power ON/OFF pushbutton.

2. Watch the Charging/Inverting Status LED, after approximately 15 seconds it should come on and ﬂ ash rapidly to indicate the inverter has reset. The Status LED will go off after the pushbutton is released.

Figure 4-1, Performing an Inverter Reset

4.4.2 Performing a Power Reset (i.e., power reset)

To perform a power reset (also known as a “hard reset”):

1. Open the inverter’s positive DC disconnect (or disconnect the positive battery cable to the inverter).

Note: If parallel stacked with multiple inverters, open all the inverters’ DC disconnects at the same time.

CAUTION: If removing all battery power (positive and negative) to the inverter, do not remove the DC negative connections to the inverter or any accessory until after all positive battery connections have been disconnected. This will prevent damage to the inverter or to any network connected accessory.

2. Ensure the inverter and the remote are disconnected from all AC and DC power (the remote display will be blank).

3. After the inverter has been disconnected from all power for 30 seconds, reconnect the inverter DC disconnects (or reconnect the positive battery cable) and resume operation.

Info: If DC disconnects are not used, there may be a momentary spark when the positive battery cable is connected to the inverter’s terminal. This is normal and indicates that the inverter’s internal capacitors are being charged.

Page 41

Appendix A - Speciﬁ cations and Optional Equipment

Appendix A – Speciﬁ cations and Optional Equipment

A-1 Inverter/Charger Speciﬁ cations

Models

Inverter Speciﬁ cations

Input Battery Voltage Range 9 to 16 VDC Absolute Maximum DC Input 25 VDC AC Output Voltage Accuracy 120 VAC ±5% (≤ continuous power) Output Frequency and Accuracy 60 Hz ± 0.1 Hz Continuous Power Output (at 45°C) 2000 VA 2500 VA 3100 VA Continuous AC Output Current 17 A 21 A 26 A 1 msec Surge Current (amps AC) 60 100 120 100 msec Surge Current (amps AC) 37 45 50 5 sec Surge Power (real watts) 3700 5000 6000 30 sec Surge Power (real watts) 3450 4500 4800 5 min Surge Power (real watts) 3100 3500 3950 30 min Surge Power (real watts) 2400 2900 3500 Rated Input Battery Current 266 ADC 333 ADC 413 ADC Inverter Efﬁ ciency (peak) 95% 91% 90% HBCO/HBCI (High Battery Cut Out/In) 15.8 VDC/15.5 VDC LBCO/LBCI (Low Battery Cut Out/In) 10.0 VDC (adj)/12.5 VDC Series Stacking 120/240 VAC No Transfer Time 16 msecs Search Mode (typical) 5 watts No Load (120 VAC output, typical) 20 watts 23 watts 25 watts

Waveform Modiﬁ ed Sine Wave

Charger Speciﬁ cations

Continuous Output at 45°C 100 ADC 120 ADC 160 ADC Input Current – Rated Output (AAC) 14 18 22 Charger Efﬁ ciency 85% AC Input Frequency Range 50 to 70 Hz AC Input Voltage Range 60 to 140 VAC (120 VAC nominal) Power Factor > 0.95

General Features and Capabilities

Transfer Relay Capability 30 AAC max/wired input (50 AAC total)

Five-stage Charging Capability Bulk, Absorb, Float, Equalize (requires remote), and Battery Saver™ Battery Temperature Compensation Yes, 15 ft Battery Temp Sensor standard Internal Cooling 0 to 120 cfm variable speed drive using dual 92 mm brushless DC fan Overcurrent Protection Yes, with two overlapping circuits Over-temperature Protection Yes, on transformer, MOSFETS, and battery Corrosion Protection PCB’s conformal coated, powder coated chassis/top, and stainless steel fasteners Safety Listings ETL listed to UL/cUL 458, and CSA C22.2 # 107.1-01 Warranty 3 years parts and labor Branch-Rated Output Breaker Yes

Environmental Speciﬁ cations

Operating Temperature -20°C to +60°C (-4°F to 140°F) Non-operating Temperature -40°C to +70°C (-40°F to 158°F) Operating Humidity 0 to 95% RH non-condensing

Physical Speciﬁ cations

Unit Dimensions (l x w x h) 13.75” x 12.65” x 8.0” (34.9 cm x 32.1 cm x 20.3 cm) Shipping Dimensions (l x w x h) 19” x 15” x 13” (48.3 cm x 38.1 cm x 33 cm) Mounting Shelf (top or bottom up) or wall (no uncovered vents on top or bottom) Unit Weight 37 lb (16.8 kg) 41 lb (18.6 kg) 46 lb (20.9 kg) Shipping Weight 46 lb (20.9 kg) 51 lb (23.1 kg) 56 lb (25.4 kg) Max operating altitude 15,000’ (4570 m)

Speciﬁ cations @ 25°C (unless otherwise noted) – Subject to change without notice.

ME2012-G ME2512-G ME3112-G

30A max wired output or 20A GFCI output

Appendix A - Speciﬁ cations and Optional Equipment

A-2 Optional Equipment and Accessories

The following Sensata components are available for use with the ME-G Series inverter/charger. Some of these items are required depending upon the intended use of the inverter.

Smart Battery Combiner

The Smart Battery Combiner (ME-SBC a portion of the current that is charging the main battery. The ME-SBC eliminates a signiﬁ cant voltage drop, and provides automatic turn-on and turn-off based on adjustable voltage setpoints. This allows different batteries to be charged from a single charging source, and prevents overcharging/undercharging.

Remote Switch Adapters

The ME-RSATM and ME-RSA-MTM pigtail adapters allow the inverter to be remotely switched on and off—with or without the ME-RC50 remote display.

Basic Remote Control

The ME-RC50 Remote Control Panel is simple to use; an LCD screen and “at a glance” LEDs display complete inverter/charger status. Soft keys provide simple access to menus and a rotary encoder knob allows you to scroll through and select a wide range of settings such as: Inverter ON/OFF, Charger ON/OFF, Shorepower Breaker Setting, AGS Control, as well as Meter, Setup and Tech menus.

Advanced Remote Control

The ME-ARC50 Remote Control Panel uses an LCD screen and “at a glance” LEDs to provide operating information and allow advanced features to be conﬁ gured (requires Magnum inverters with advanced conﬁ gurable features). This LCD remote control also provides advanced monitoring/ troubleshooting and includes a FAVS button to access your favorite features quickly.

Auto Generator Start Controller

The ME-AGS-N Automatic Generator Start controller (Network version) is designed to automatically start your generator based on low battery condition or high temperature. The AGS controller

includes an input voltage jumper (for 12, 24, and 48-volt battery banks) and a 4-position DIP (Dual In-line Package) switch which provides the ability to change the relay timing conﬁ gurations to allow compatibility with a wider range of generators. Adjustable settings when using the ME-

ARC50 include starting the generator based on: Battery Voltage, Time Of Day, Battery ‘State of Charge’ or High Temperature.

Battery Monitor Kit

The ME-BMK Battery Monitor Kit is a single battery bank amp-hour meter that monitors the

condition of the battery and provides information to let you know how much energy you have available and let you plan your electrical usage to ensure the battery is not being over-discharged. The ME-BMK-NS version does not include a DC shunt—order the ME-BMK to receive a 500A/50mv

DC shunt.

ME-CB and MPX-CB Conduit Boxes

The ME-CB and MPX-CB conduit boxes are provided for installations where the electrical code requires AC and/or DC wiring to your inverter to be enclosed and protected.

) is designed to monitor and charge a second battery using

Page 43

Appendix B - Battery Information

Appendix B – Battery Information

B-1 Battery Location

Periodic maintenance (e.g., checking connections, cleaning, watering) on batteries is required. Locate the batteries in an accessible location to perform this maintenance.

Batteries must be mounted in a clean, dry, ventilated environment where they are protected from high and low temperatures. The battery bank should be located as close to the inverter as possible without limiting access to the inverter’s disconnects. Longer battery cable runs tend to lose efﬁ ciency and reduce the overall performance of an inverter.

To ensure optimum performance, a ventilated battery enclosure is recommended. Two feet (61 cm) of clearance above the batteries is recommended for access to the battery terminals and removable caps (lead acid battery types).

WARNING: Be very careful when working around batteries, they can produce extremely high currents if they are short-circuited. Read the important safety instructions at the beginning of this manual and the precautions from the battery supplier before installing the inverter and batteries.

CAUTION: Do not mount the batteries beneath the inverter (or in the same compartment). Batteries emit corrosive fumes which could damage the inverter’s electronics. Never locate dedicated batteries near a vehicle/home fuel tank containing gasoline or propane.

B-2 Battery Types

Batteries are available in different sizes, amp-hour ratings, voltage, and chemistries. They are also available for starting applications (such as an automobile starting battery) and deep discharge applications. Only the deep cycle types are recommended for inverter applications; using a starting battery in an inverter (deep cycle) application will greatly shorten their useful life. Choose the batteries best suited for the inverter installation and cost. Use only the same battery type for all batteries in the bank. For best performance, all batteries should be from the same lot and date. This information is usually printed on a label located on the battery.

B-3 Battery Temperature

Battery performance of lead-acid type batteries is greatly affected by extreme temperatures. When a lead-acid type battery is cold, its effective amp-hour capacity is reduced. When determining the battery requirements needed for the inverter system, realize that the battery capacity will be reduced if they will be installed in a climate where extremely cold temperatures are expected. In this type of environment, the batteries should be located in a heated area. At the minimum, the batteries should be installed in an insulated enclosure; which will keep the batteries warmer as they are being charged.

The battery bank should also be protected from high temperatures, which will shorten battery life. In high heat situations the battery room/enclosure should be ventilated to bring in cooler air and exhaust the hotter air. The performance of the battery bank/inverter system will substantially increase by monitoring and preventing extreme temperatures around the batteries.

B-4 Battery Bank Sizing

The size of the battery bank determines how long the inverter will power the AC loads without recharging. The larger the battery bank, the longer the run time. Size your battery bank to the systems AC load requirements and length of time required to run from the batteries. In general, the battery bank should not be discharged more than 50%. Additional DC charging devices can provide longer run times by recharging the batteries in the absence of AC utility power or generator power.

Info: For the ME-G Series inverter/charger to perform optimally, a minimum battery bank of 200 AH is recommended for moderate loads (<1000W) and greater than 400 AH for heavy loads (≥1000W).

Appendix B - Battery Information

B-5 Battery Bank Sizing Worksheet

Complete the steps below to determine the battery bank size required to power your AC loads:

1. Determine the daily power needed for each load

a) List all AC loads required to run; and b) List the Watt-Hours for each load (see Table B-1 for common loads/wattage); and c) Multiply by how many hours per day (or a fraction of an hour) each load will be used; and d) Multiply by how many days per week you will use the listed loads; and e) Divide by seven = Average Daily Watt-Hours Per Load.

Average Daily Watt-Hours Per Load

AC load Watt-Hours (x) hours per day (x) days per week

2. Determine the total power needed each day for all the loads.

• Add Average Daily Watt-Hours Per Load = Total Daily Watt-Hrs.

3. Determine the battery Amp-Hour capacity needed

to run all the loads before recharging.

• Divide the Total Daily Watt-Hours by the nominal

battery voltage of the inverter (i.e., 12 volts); and

 Multiply this by how many days the loads will need to run without having power to recharge the batteries (typically 3 to 5 days of storage) = Storage Amp-Hours.

(inverter battery voltage)

÷ ___ =

(days of storage)

x ___ =

(

7) = total power

Total Daily Watt-Hours

4. Determine how deeply you want to discharge your batteries.

 Divide the Storage Amp-Hours by 0.2 or 0.5 to get the Total Amp-

Hours:

a) 0.2 = Discharges the batteries by 20% (80% remaining), this is considered the optimal level for long battery life; or b) 0.5 = Discharges the batteries by 50% (50% remaining), this

Total Amp-Hours

is considered a realistic trade-off between battery cost and battery life.

Additional compensation:

Low battery temperature: If the batteries are installed in a location that will be exposed to low temperatures, the available output will be less. In these instances, you will need to determine the lowest temperature the battery bank will experience and multiply the Total Amp-Hours by the multiplier below.

Temperature 80F/27C 70F/21C 60F/15C 50F/10C 40F/4C 30F/-1C 20F/-7C

Multiplier 1.00 1.04 1.11 1.19 1.30 1.40 1.59

Inverter efﬁ ciency: When the inverter is used in a back-up power application the inverter efﬁ ciency is not a large concern. However, if the inverter is the primary AC source for the calculated load, the Total Amp-Hours should be multiplied by 1.2 to factor in an average 80% inverter efﬁ ciency.

Page 45

Appendix B - Battery Information

B-6 Battery Wiring Conﬁ gurations

The battery bank must be wired to match the inverter’s DC input voltage. In addition, the batteries can be wired to provide additional run time. The various wiring conﬁ gurations include:

B-6.1 Series Wiring

Wiring batteries in series increases the battery bank’s output voltage. A series connection combines each battery in a string until the total voltage matches the inverter’s DC requirement. Even with multiple batteries, the capacity remains the same. In Figure B-1 below, two 6 VDC/200 AH batteries are combined into a single string resulting in a 12 VDC, 200 AHr bank.

Series Battery Wiring

combines battery voltage:

6 VDC

(200 AH)

6 VDC

(200 AH)

12 VDC @

200 AH

Figure B-1, Series Battery Wiring

B-6.2 Parallel Wiring

Wiring batteries in parallel increases the battery bank’s amp-hour capacity, which allows the AC loads to operate for a longer time. A parallel connection combines the number of batteries in the string to increase overall battery capacity; however, the voltage remains the same. In Figure B-2 below, two 12 VDC/100 AH batteries are combined into a single 12 VDC, 200 AH battery bank.

200 AH @ 6 VDC

+ 200 AH @ 6 VDC

= 200 AH @ 12 VDC

Parallel Battery Wiring

12 VDC

(100 AH)

12 VDC

(100 AH)

12 VDC @

200 AH

combines battery capacity:

100 AH @ 12 VDC

+ 100 AH @ 12 VDC = 200 AH @ 12 VDC

Figure B-2, Parallel Battery Wiring

B-6.3 Series-Parallel Wiring

A series/parallel conﬁ guration increases both voltage (to match the inverter’s DC requirements) and Amp-Hour capacity (to increase run-time for operating the loads) using smaller, lowervoltage batteries. In Figure B-3 below, four 6 VDC/200 AH batteries are combined into two strings resulting in a 12 VDC, 400 AH battery bank.

Series/Parallel Battery Wiring

combines battery voltage and capacity:

6 VDC

(200 AH)

6 VDC

(200 AH)

6 VDC

(200 AH)

6 VDC

(200 AH)

12 VDC @

400 AH

200 AH @ 6 VDC + 200 AH @ 6 VDC = 200 AH @ 12 VDC

200 AH @ 12 VDC

+ 200 AH @ 12 VDC

= 400 AH @ 12 VDC

add voltage

in series

add capacity

in parallel

Figure B-3, Series-Parallel Battery Wiring

voltage and

capacity together

String

(12 VDC @ 100 AH)

12-volt battery bank (one string of one 12-volt battery)

Series String

(6 VDC + 6 VDC)

12-volt battery bank (one string of two 6-volt batteries wired in series)

6 VDC

battery

(200 AH)

Appendix B - Battery Information

overcurrent

protection

to 12 VDC

12 VDC

battery

(100 AH)

overcurrent

protection

6 VDC

battery

(200 AH)

inverter

(total capacity

= 100 AH)

to 12 VDC

inverter

(total capacity

= 200 AH)

Parallel String

(100 AH + 100 AH)

12-volt battery bank (parallel two 12-volt batteries)

Series String

(6 VDC + 6 VDC)

Series String

(6 VDC + 6 VDC)

overcurrent

protection

12 VDC battery

(100 AH)

12 VDC battery

(100 AH)

Parallel String (200 AH + 200 AH)

6 VDC

battery

(200 AH)

6 VDC

battery

(200 AH)

6 VDC

battery

(200 AH)

6 VDC

battery

(200 AH)

to 12 VDC

inverter

(total capacity

= 200 AH)

overcurrent

protection

to 12 VDC

inverter

(total capacity

= 400AH)

(2 strings of two 6-volt batteries wired in series and connected in parallel)

Figure B-4, Battery Bank Wiring Examples

12-volt battery bank

Page 47

Appendix C – Power Consumption & Output Waveforms

C-1 Appliances and Run Time

The ME-G Series inverter/charger powers a wide range of household appliances including small motors, hair dryers, clocks, and other electrical devices. As with any appliance using batteries for power, there is a certain length of time that it can run—i.e., “run time.” Actual run time depends on several variables, including: the size and type of appliance, the type of batteries installed in your application, as well as the battery’s capacity and age. Other factors such as the battery’s state of charge (SOC) and temperature can also affect the length of time your appliances can run.

Appliances (TVs, VCRs, stereos, computers, and lights) can all be successfully powered by your inverter. Larger electrical appliances, however, such as stoves, water heaters, etc., can quickly drain your batteries and are not recommended for inverter applications.

All electrical appliances are rated by the amount of power they consume (See Table C-1). The rating is printed on the product’s nameplate label, usually located on its chassis near the AC power cord. Even though it is difﬁ cult to calculate exactly how long an inverter will run a particular appliance, the best advice is trial and error. Your ME-G Series inverter has a built-in safeguard that automatically protects your batteries from over-discharge.

Info: For optimum performance, a minimum battery bank of 200 AH is recommended for moderate loads (<1000W) and greater than 400 AH for heavy loads (≥1000W).

Table C-1, Typical Appliance Power Consumption

Device Load Device Load Device Load

Blender 400W Coffee Maker 1200W Light (Flo) 10W

Computer 300W Color TV 150W Light (Inc) 100W

Drill 500W Hair Dryer 1000W Microwave 1000W

Hot Plate 1800W Iron 1000W Refrigerator 500W

C-2 Output Waveform

The inverter’s output waveform is the shape of the wave that alternating current makes as its voltage rises and falls with time (see Figure C-1 below). The three basic output waveforms are:

• Modiﬁ ed Sine Wave – Also referred to as a “quasi sine wave” or a “modiﬁ ed square wave”. This output looks like a one-step staircase and the waveform changes its width to continually provide the correct RMS output voltage regardless of the battery voltage. Most loads that run from a sine wave will also run from a modiﬁ ed sine wave. However, things such as clocks and furnace controllers may have trouble.

• Sine Wave – An AC waveform that looks like rolling waves on water. It rises and falls smoothly with time. The grid puts out a sine waveform. Any plug-in AC equipment will operate from a sine wave output inverter.

• Square Wave – The simplest AC waveform. Some types of equipment behave strangely when powered from a square wave inverter.

200 160

120

80 40

VOLTAGE

80 120 160 200

TIME

Figure C-1, AC Waveforms

Square Wave

Sine Wave

Modified

Sine Wave

Page 48

Appendix D - Inverter/Charger Terminology

Appendix D – Inverter/Charger Terminology

The following is a glossary of terms with which you may not be familiar. They appear in the various descriptions of inverter and battery charger operation.

Absorbtion Stage – In this second stage of three stage charging, the batteries are held at a constant voltage (the absorb voltage setting) and the battery is charged to its maximum capacity.

AC (Alternating Current) – Electrical current that varies with time (i.e., utility power). The rate at which the voltage changes polarity is the frequency in Hertz (Hz).

Ampacity – The ampacity of a wire is its current carrying capacity with reference to the crosssectional area of the conductors, the temperature rating of the insulation and the ambient temperature.

Automatic Transfer Relay (inside the inverter) – An automatic switch that switches between Inverter and Standby mode depending on availability of AC input power. If AC is present, the unit will be a battery charger and pass power through the inverter. When the AC goes away, the unit becomes an inverter.

Bulk Charge Stage – The ﬁ rst stage in three stage charging. In this stage, a constant current is fed to the batteries and as they accept the current the battery voltage will rise.

CEC (Canadian Electrical Code) – The guidelines and acceptable practices for electrical installations in Canada.

Current (Amps) – The amount of electricity ﬂ owing through a conductor. DC (Direct Current) – Electrical current that does not vary with time (i.e., battery voltage). Deep Cycle – A deep cycle occurs when a battery is discharged to less than 20% of its capacity

(80% depth-of-discharge). Deep Cycle Battery – A battery designed to be routinely discharged to 20% of its maximum

capacity without damage. This type of battery is recommended for use with an inverter system. Derating – As an inverter (or charger) is used above its normal temperature, it’s capacity to

power loads (or charge) continuously is decreased.

Digital Volt Meter (DVM):

True RMS – A voltmeter that incorporates a RMS converter to read true RMS for any waveform

shape. Averaging Type – A voltmeter that requires a sine wave waveform shape to provide an

accurate reading.

Efﬁ ciency – Usually given as a percentage, efﬁ ciency is the ratio of the output to the input. The efﬁ ciency changes with power output levels of any inverter.

Electrolyte – Typically a mixture of water and sulfuric acid that is used in lead-acid batteries; it is commonly referred to as battery acid.

Equalization – Controlled “overcharging” of the battery causing it to bubble and mix. This helps reduce stratiﬁ cation.

Float Stage – During the third stage of three stage charging, the voltage and current are reduced to a level that will trickle charge or maintenance charge the battery. This assures the battery remains fully charged even while sitting.

Fuse or Disconnect – When current exceeds a preset limit the fuse or disconnect will fail before the wiring or equipment it is protecting. Disconnects are also called circuit breakers. These are usually reset and can act as a switch to turn off power to equipment for servicing.

Grid (The grid) – Also called the utility grid, this refers to the public power distribution system. Impedance – Slows the electrical ﬂ ow of Alternating Current (AC)

LED (Light Emitting Diode) – A light made up of semi-conducting material. Line Tie – Term used when the inverter is connected to public power or the “grid” system. Load(s) – An electrical item that draws power (i.e., lights, radio, refrigerator, etc.) to work.

Page 49

Appendix D - Inverter/Charger Terminology

Locked Rotor Amps – The current drawn by an electric motor with the shaft or rotor stopped

and locked in position. This can be used to determine if an inverter has enough surge current to start a motor. If the inverter is capable of producing more amperage than the locked rotor amps rating of a motor, it will most likely start the motor easily.

NEC (National Electric Code) – The guidelines and acceptable practices for electrical installations in the USA.

Off Grid – Not connected to public power in any way. Pass Through Current – The amount of current the inverter can safely pass directly from the

AC input to the AC output.

Photovoltaic (PV) – Solar powered. Resistance (Ohms) – Slows the electrical ﬂ ow of Direct Current (DC) RMS (Root Mean Square) – A measure of AC voltage that provides the equivalent heating value

across a resistor as would a DC source of the same voltage. Sellback, or Selling Back To The Grid or Utility-Interactive – Some inverters have the

capability to take energy stored in batteries, or from solar panels, and put it back into the utility grid. The local public utility company can compensate you for using this energy.

Shorepower – The process of providing shoreside electrical power to a boat while its main and auxiliary engines are turned off. The source for shorepower may be grid power from an electric utility company, or from an external remote generator.

Stacking:

• Series – Two inverters operating together to produce twice the power and voltage of a

single inverter. Required when operating 240 VAC loads and separate 120 VAC loads from either inverter.

• Parallel – Two inverters operating together to provide twice the continuous capacity on a single output circuit. Required when a single load is too large for one inverter.

Stratiﬁ cation – Over time, a battery’s electrolyte (liquid) tends to separate. The electrolyte at the top of the battery becomes watery while at the bottom it becomes more acidic. This effect is corrosive to the plates.

Sulfating – As a battery discharges, its plates become covered with lead sulfate. During recharging, the lead sulfate leaves the plates and recombines with the electrolyte. If the lead sulfate remains on the plates for an extended period of time (over two months), it hardens, and recharging will not remove it. This reduces the effective plate area and the battery’s capacity.

Temperature Compensation – Peak available battery voltage is temperature dependent. As ambient temperatures fall, the proper voltage for each charge stage needs to be increased. A Battery Temperature Sensor (BTS) automatically re-scales charge-voltage settings to compensate for ambient temperatures.

Voltage – The pressure that causes electrical ﬂ ow in a circuit. Watts – Measure of power output or utilization. Watts = Volts x Amps.

Appendix E - Warranty & Service

Appendix E – Warranty & Service

E-1 Limited Warranty

Sensata Technologies warrants this ME-G Series inverter/charger to be free from defects in material and workmanship that result in product failure during normal usage, according to the following terms and conditions:

1. The limited warranty for the product extends for 36 months beginning from the product’s original date of purchase.

2. The limited warranty extends to the original purchaser of the product and is not assignable or transferable to any subsequent purchaser.

3. During the limited warranty period, Sensata will repair or replace at our option any defective parts, or any parts that will not properly operate for their intended use, with factory new or remanufactured replacement items if such repair or replacement is needed because of product malfunction or failure during normal usage. The limited warranty does not cover defects in appearance, cosmetic, decorative or structural parts or any non-operative parts. Sensata’s limit of liability under this warranty shall be the actual cash value of the product at the time the original purchaser returns the product for repair, determined by the price paid by the original purchaser. Sensata Technologies shall not be liable for any other losses or damages.

4. Upon request from Sensata, the original purchaser must prove the product’s original date of purchase by a dated bill of sale, itemized receipt.

5. The original purchaser shall return the product prepaid to Sensata in Everett, WA, or to one of Sensata’s Authorized Service Centers (ASC). After the completion of service under this limited warranty, the product will be returned prepaid to the original purchaser via a non-expedited surface freight within the contiguous U.S. and Canada; this excludes Alaska and Hawaii.

6. If Sensata repairs or replaces a product, its warranty continues for the remaining portion of the original warranty period or 90 days from the date of the return shipment to the original purchaser, whichever is greater. All replaced products and parts removed from the repaired products become the property of Sensata Technologies.

7. This limited warranty is voided if:

• the product has been modiﬁ ed without authorization

• the serial number has been altered or removed

• the product has been damaged from abuse, neglect, accident, high voltage or corrosion

• the product was not installed and operated according to the owner's manual

A RETURN MATERIAL AUTHORIZATION (RMA) NUMBER IS REQUIRED

BEFORE RETURNING ANY UNIT,

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Appendix E - Warranty & Service

E-2 How to Receive Repair Service

If your product requires warranty service or repair, contact either:

• An Authorized Service Center—listed at (

• Sensata Technologies at: Telephone: 425-353-8833 Fax: 425-353-8390 Email: MagnumWarranty@Sensata.com

If returning the product directly to Sensata for repair, you must:

1. Return the unit in the original, or equivalent, shipping container.

2. Receive a Return Materials Authorization (RMA) number from the factory prior to the return

of the product to Sensata Technologies for repair.

3. Place RMA numbers clearly on the shipping container or on the packing slip.

When sending your product for service, please ensure it is properly packaged. Damage due to inadequate packaging is not covered under warranty. We recommend sending the product by traceable or insured service.

BEFORE RETURNING ANY UNIT,

A RETURN MATERIAL AUTHORIZATION (RMA) NUMBER IS REQUIRED

www.Magnum-Dimensions.com), or

Magnum-Dimensions Products

Manufactured by:

Sensata Technologies

2211 West Casino Rd.

Everett, WA 98204

Phone: 425-353-8833

Fax: 425-353-8390

Web: www.Magnum-Dimensions.com

ME-G Series Owner’s Manual (PN: 64-0071 Rev A)

Magnum Energy ME-G User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1.0 Introduction

1.1 How an ME-G Series Inverter/Charger Works

2.0 Installation

2.1 Pre-Installation

2.2 Mounting the Inverter

2.3 Wiring the Inverter – General Requirements

2.4 DC Wiring

2.5 AC Wiring

2.6 Grounding Inverters

2.8 Final Inspection

2.9 Functional Test

3.0 Operation

3.1 Inverter Mode

3.2 Standby Mode

3.3 Battery Charging

3.4 Transfer Time

3.5 Battery Temperature Sensor Operation

3.6 Protection Circuitry Operation

3.7 Inverter Startup

3.8 Factory Default Values

3.9 Using the GFCI

3.10 Inverter Fan Operation

3.11 Using a Remote with the ME-G Series Inverter

4.0 Maintenance and Troubleshooting

4.1 Recommended Inverter and Battery Care

4.2 Storage for Mobile Installations

4.3 Troubleshooting

4.4 Resetting the Inverter

A-2 Optional Equipment and Accessories

Appendix B – Battery Information

B-1 Battery Location

B-2 Battery Types

B-3 Battery Temperature

B-4 Battery Bank Sizing

B-5 Battery Bank Sizing Worksheet

Appendix C – Power Consumption & Output Waveforms

C-1 Appliances and Run Time

C-2 Output Waveform

Appendix D – Inverter/Charger Terminology

Appendix E – Warranty & Service

E-1 Limited Warranty

E-2 How to Receive Repair Service