Magnum Energy ME-MR User Manual

ME-MR

Remote Control

Owner’s Manual

(for Revision 1.1 or higher)

Disclaimer of Liability

The use of this manual and the conditions or methods of installation, operation,
use, and maintenance of the ME-MR remote are beyond the control of Magnum
Energy, Inc. Therefore, this company does not assume responsibility and
expressly disclaims liability for loss, damage or expense, whether direct,
indirect, consequential or incidental, arising out of or in any way connected
with such installation, operation, use, or maintenance.

Note as well that while every precaution has been taken to ensure the accuracy
of the contents of this manual, the specifi cations and product functionality
may change without notice. Magnum Energy, Inc. assumes no responsibility
for errors or omissions.

Restrictions on Use

The ME-MR remote may only be used in life-support devices or systems with
the express written approval of Magnum Energy. Failure of the ME-MR remote
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-MR fails, it is reasonable to assume that the health of the user or
other persons may be endangered.

Copyright Notice

Copyright © 2013 by Magnum Energy, Inc. All rights reserved. Permission to
copy, distribute, and/or modify this document is prohibited without express
written consent of Magnum Energy, Inc.

Document Information

Description – ME-MR Owner’s Manual
Part Number and Revision – 64-0031 Rev D
Date Published – March 2013
This manual is published without color for cost savings. However, this en-

tire manual is available for download under the Document Library tab at

http://www.magnumenergy.com —with many of the fi gures available in color.

Contact Information

Magnum Energy, Inc.
2211 West Casino Rd.
Everett, WA 98024
Phone: [phone]
Fax: [phone]
Web:

http://www.magnumenergy.com

Statement of Appreciation

From all of us at Magnum Energy –
Thank you for purchasing this ME-MR remote.
We understand that you have many purchasing options in the marketplace,

and are pleased that you have decided on a Magnum Energy product. This
ME-MR remote was proudly assembled and tested in the United States in our
Everett, Washington, facility.

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

Magnum Energy® is a registered trademark of Magnum Energy, Inc.

Important Product Safety Instructions

This manual contains safety instructions that must be followed during the
installation and operation of this product. Read all instructions and safety
information contained in this manual

Safety Symbols

To reduce the risk of electrical shock, fi re, or other safety hazard, the fol-
lowing 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 supple-

ments important points of the main text.

Remedy: This symbol provides possible solutions for related is-

sues.

before

installing or using this product.

Product Safety Alerts

All electrical work must be performed in accordance with local, state, and
federal electrical codes.

WARNING:

• 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.

• Remove all jewelry such as rings, watches, bracelets, etc.,
when installing or performing maintenance on the inverter.

• Always disconnect the batteries or energy source prior to
installing or performing maintenance on the inverter. Live
power may be present at more than one point since an in­verter utilizes both batteries and AC. Turning off the inverter
may not reduce this risk on some Magnum inverters. As long
as AC power is connected, it will pass thru the inverter regard­less of the power switch on the inverter or the ON/OFF button
on the remote.

©2013 Magnum Energy, Inc. ii

Table of Contents

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

2.0 Installation ................................................................2

2.1 Pre-Installation .................................................................... 2

2.1.1 Installation Guidelines ....................................................... 2

2.1.2 Unpacking and Inspection .................................................. 2

2.1.3 Tools Required .................................................................. 2

2.2 Installation Procedure ........................................................... 2

2.2.1 Flush Mounting the Remote ................................................ 3

2.2.2 Surface Mounting the Remote using the Bezel ....................... 3

2.2.3 Connecting the Remote ...................................................... 4

3.0 Setup ......................................................................... 5

3.1 Navigating the Remote.......................................................... 5

3.2 Remote Menu Items ............................................................. 6

3.2.1 AC IN Menu ...................................................................... 6

3.2.2 Search Watts Menu ........................................................... 7

3.2.3 Battery Amp-Hours Menu ................................................... 8

3.2.4 Battery Type Menu ...........................................................10

3.2.5 Charge Rate Menu ............................................................11

3.2.6 Low Battery Cut-Out (LBCO) Menu .....................................12

3.2.7 VAC Dropout Menu ...........................................................13

3.2.8 Power Save Menu .............................................................13

3.2.9 Equalize Menu .................................................................14

3.2.10 Charger Standby Menu .....................................................15

3.2.11 Power On Menu ...............................................................15

3.2.12 TECH Menu .....................................................................16

4.0 Menu Map: ME-MR Remote Control ...........................18

5.0 Operation .................................................................19

5.1 Front Panel .........................................................................19

5.1.1 LED Indicators .................................................................19

5.1.2 LCD Display .....................................................................19

5.1.3 ME-MR Remote Buttons ....................................................19

5.2 Operating the Inverter/Charger .............................................20

5.3 System Status Messages ......................................................21

5.3.1 Inverter Mode Messages ...................................................21

5.3.2 Charger Mode Messages ....................................................22

5.3.3 Fault Mode Messages ........................................................27

5.3.3.1 System Fault Messages ..................................................27

5.3.3.3 Internal Fault Messages .................................................34

5.3.4 LED Indicator Guide .........................................................35

6.0 Troubleshooting ....................................................... 36

6.1 Troubleshooting Tips ............................................................37

6.1.1 Inverter Problems: ...........................................................37

6.1.2 Charger Problems: ...........................................................37

6.2 Performing an Inverter Reset ................................................38

6.3 Performing a Power Reset .....................................................38

7.0 Warranty and Service Information ...........................39

7.1 Limited Warranty ................................................................39

7.1.1 How to Receive Repair Service ...............................................40

iii ©2013 Magnum Energy, Inc.

List of Figures

Figure 1-1, Front Panel Features .......................................................... 1

Figure 2-1, Cut-Out Dimensions for Flush Mounted Remote ..................... 3

Figure 2-2, Bezel Dimensions for Surface Mounted Remote ..................... 3

Figure 2-3, Remote Control Connections ............................................... 4

Figure 3-1, Scrolling Home Screens ..................................................... 5

Figure 3-2, AC IN Selections ............................................................... 6

Figure 3-3, Search Watts Selections ..................................................... 7

Figure 3-4, Battery Amp-Hours Selections ............................................. 8

Figure 3-5, Battery Type Selections .................................................... 10

Figure 3-6, Charge Rate Selections .................................................... 11

Figure 3-7, LBCO: Low Battery Cut-Out Selections ............................... 12

Figure 3-8, VAC Dropout Selections .................................................... 13

Figure 3-9, Power Saver Selections .................................................... 14

Figure 3-10, Equalize Selections ........................................................ 14

Figure 3-11, Charger Standby Selections ............................................ 15

Figure 3-12, Power On Selections ...................................................... 16

Figure 3-13, TECH Menus ................................................................. 17

Figure 4-1, ME-MR Remote Menu Map ................................................ 18

Figure 5-1, ME-MR Front Panel Controls and Indicators ......................... 19

Figure 5-2, Inverter Standby Mode .................................................... 21

Figure 5-3, Inverting Mode ............................................................... 21

Figure 5-4, Off Mode ........................................................................ 22

Figure 5-5, Searching Mode .............................................................. 22

Figure 5-6, Absorb Charging Mode ..................................................... 22

Figure 5-7, Bulk Charging Mode ......................................................... 23

Figure 5-8, Charger Standby Mode ..................................................... 23

Figure 5-9, Charging Mode ................................................................ 23

Figure 5-10, Equalizing Mode ............................................................ 24

Figure 5-11, Float Charging Mode ...................................................... 25

Figure 5-12, Full Charge Mode ........................................................... 25

Figure 5-13, Load Support AAC Mode ................................................. 25

Figure 5-14, Load Support VDC Mode ................................................. 26

Figure 5-15, Unknown Mode ............................................................. 26

Figure 5-16, AC Overload Fault .......................................................... 27

Figure 5-17, BackFeed Fault .............................................................. 27

Figure 5-18, Breaker Tripped Fault ..................................................... 28

Figure 5-19, Dead Battery Charge Fault .............................................. 28

Figure 5-20, FET Overload Fault......................................................... 28

Figure 5-21, High Battery Fault ......................................................... 29

Figure 5-22, High Battery Temp Fault ................................................. 29

Figure 5-23, High Volts AC Fault ........................................................ 30

Figure 5-24, Low Battery Fault .......................................................... 30

©2013 Magnum Energy, Inc. iv

List of Figures (Cont.)

Figure 5-25, No Communication ........................................................ 30

Figure 5-26, Overcurrent Fault .......................................................... 31

Figure 5-27, Overtemp Fault ............................................................. 31

Figure 5-28, Stuck Relay Fault ........................................................... 32

Figure 5-29, Tfmr Overtemp Fault ...................................................... 32

Figure 5-30, Unknown Fault .............................................................. 32

Figure 5-31, Stack Clock Fault ........................................................... 33

Figure 5-32, Stack Mode Fault ........................................................... 33

Figure 5-33, Stack Phase Fault .......................................................... 33

Figure 5-34, Internal Bridge Fault ...................................................... 34

Figure 5-35, Internal Charger Fault .................................................... 34

Figure 5-36, Internal NTC Sensor Fault ............................................... 34

Figure 5-37, Internal Relay Fault ....................................................... 35

Figure 6-1, Performing an Inverter Reset ............................................ 38

List of Tables

Table 3-1, Battery Amp-Hrs to Absorb Charging Time ............................. 8

Table 3-2, Battery Size to Battery Amp-Hours (estimated) ...................... 9

Table 3-3, Battery Type to Charge Voltages ......................................... 10

Table 3-4, ME-MR’s Inverter/Charger Default Settings ........................... 17

Table 5-1, LED Indicator Guide .......................................................... 35

Table 6-1, Remote Troubleshooting .................................................... 36

v ©2013 Magnum Energy, Inc.

1.0 Introduction

1.0 Introduction

The ME-MR remote control allows you to monitor and customize the basic
operating parameters of your Magnum inverter/charger. This remote can be
used on all Magnum inverter/charger models.

Info: The ME-MR remote control has minimal settings available

from its menu. Careful consideration should be given to choosing
this remote over the full featured ME-RC when customizing the
inverter/charger for your particular system.

The ME-MR25 comes standard with a 25-foot, 4-conductor telephone cable
and includes non-volatile memory (preserves adjustable settings, even if
power to the remote or inverter is removed).

Info: This manual is for the ME-MR remote with revision 1.1 or

higher. See
on how to determine your revision level.

Section 3.2.12 (TECH Menu) on page 16 for information

LCD

LED

Display

Indicators

SAVE/

HOLD

Button

ON/OFF

/CHANGE Button

MENU/HOME

Button

Figure 1-1, Front Panel Features

The ME-MR is equipped with the following features:

• LED Indicators – The at-a-glance LEDs provide a quick indication of

the inverter’s status, or notifi es you if a fault is present.

• LCD Display – The LCD display is a 8 x 2 line (16 characters total),

alphanumeric display used for setting up the inverter/charger operation, as
well as viewing current status or fault messages.

• ON/OFF or CHANGE Button – This button enables you to turn the

inverter on and off, and also serves as a “change” button to navigate through
the available settings for each menu.

• MENU or HOME Button – This button accesses the remote’s menus.

You can also return directly to the scrolling Home screens by pressing and
holding this button for 2 seconds. See also Figure 3-1.

• SAVE or HOLD Button – This button serves as a “save” button to

retain your settings. This button also is used as a “hold” button to stop the
Home screens from scrolling (press and hold the button for 2 seconds).

©2013 Magnum Energy, Inc. 1

2.0 Installation

2.0 Installation

Review the Important Safety Instructions on page ii before proceeding with
the installation of your remote.

WARNING: Installations should be performed by qualifi ed per-

sonnel, such as a licensed or certifi ed electrician. The installer
determines which safety codes apply, and ensures all applicable
installation requirements are followed. Applicable installation codes
vary depending on the specifi c location and application.

2.1 Pre-Installation

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

2.1.1 Installation Guidelines

• Before connecting any wires, determine the remote cable’s route through­out the home or vehicle/boat both to and from the inverter.

• Always check for existing electrical, plumbing, or other areas of potential
damage before drilling or cutting into walls to mount the remote.

• Make sure all wires have a smooth bend radius and do not become kinked.

• If installing this remote in a boat, RV or truck, ensure the conductors
passing through walls, bulkheads, or other structural members are
protected to minimize insulation damage such as chafi ng, which can be
caused by vibration or constant rubbing.

2.1.2 Unpacking and Inspection

Carefully remove the ME-MR remote from its shipping container and inspect
all contents. Verify the following items are included:

• The ME-MR remote

• 25’ remote cable

• Two #6 x

• ME-MR Owner’s Manual

If items appear to be missing or damaged, contact your authorized Magnum
dealer or Magnum Energy, Inc. Save your proof-of-purchase as a record of
your ownership; it is needed if the unit should require in-warranty service.

½” Phillips screws

2.1.3 Tools Required

Installing the remote control is simple and requires the following tools:

• Phillips screwdriver • Level • Drill

• Cut-out tool (knife/saw) • Pencil • Drill bit (7/64”)

2.2 Installation Procedure

Select an appropriate location to install the ME-MR remote control. Allow
ample room to access the remote’s buttons and to view the LEDs. Ensure
the viewing angle of the display is appropriate. You can either fl ush mount
(concealing the connection) or surface mount the remote.

2 ©2013 Magnum Energy, Inc.

2.0 Installation

2.2.1 Flush Mounting the Remote

After selecting the desired location for fl ush mounting the remote, cut out
a square mounting hole measuring 2

remote into the cutout, and then use the remote to mark and pre-drill two

⅛” holes for the two supplied #6 x ½” Phillips fl at head mounting screws.

(2.86 cm)

2 ⅜"

(6.03 cm)

⅜” x 2⅜” (see Figure 2-1). Place the

"

11/16

2

(6.83 cm)

1 ⅛"

1 ⅛"

(2.86 cm)

Side view

2 ⅜"

(6.03 cm)

Back view

Figure 2-1, Cut-Out Dimensions for Flush Mounted Remote

2.2.2 Surface Mounting the Remote using the Bezel

After selecting the desired location for surface mounting the remote, use the
bezel (not supplied) as a template to mark the mounting holes. Mark and

pre-drill four

¾” screws.

x

⅛” holes (see Figure 2-2). Mount the bezel using the four #6

Bezel front view

Bezel side view

2 ⅛" (5.4 cm)

3 ⅛" (7.94 cm)

2 ⅛" (5.4 cm)

3 ⅛" (7.94 cm)

1

⅛

"

(2.86 cm)

Figure 2-2, Bezel Dimensions for Surface Mounted Remote

©2013 Magnum Energy, Inc. 3

2.0 Installation

2.2.3 Connecting the Remote

CAUTION: When connecting battery power to the inverter, all battery

negative connections must be connected prior to the battery posi­tive connections. When removing battery power from the inverter,
the battery positive should be removed before any battery negative
connections are disconnected. This prevents any communication
chips/lines from becoming the DC return path to the battery—causing
permanent damage to all connected accessories.

Summation: Ensure all battery negative circuits are always con-

nected before connecting or disconnecting battery positive.

1. Route the remote cable between the remote and the inverter/charger. This
25’ cable is a 4-wire telephony standard with RJ11 connectors on each
end. A standard telephone cable (with 4 conductors) may be substituted
if the provided remote cable cannot be used.

2. Connect the remote cable to the inverter/charger’s Remote port (blue
label). Refer to Figure 2-3.

3. Connect the inverter to the batteries, but ensure the inverter is off and
that no AC power is connected to the inverter.

4. While monitoring the front of the remote, connect the other end of the re­mote cable into the RJ11 jack on the back side of the remote (Figure 2-3).

5. Immediately upon connecting the remote cable the LEDs will illuminate
as the unit goes through a self-test. After the initial self-test, text should
appear with a system status message indicating the current state of
the inverter/charger. If not, please refer to the Troubleshooting section.

6. Next, mount the remote to the desired surface or to the bezel (using
the two supplied #6 x

for setup.

½” Phillips fl at head screws). The remote is ready

RJ11 Connection

B

A

C

Magnum Inverter

K

Remote Cable

Remote Port (blue)

Figure 2-3, Remote Control Connections

4 ©2013 Magnum Energy, Inc.

3.0 Setup

3.0 Setup

When the ME-MR remote is connected to a Magnum inverter/charger, the
remote’s settings determine the inverter/charger’s operating parameters.
The default settings in the remote (see Table 3-4) are adequate for most
installations. However, you can change some of the operating parameters if
needed. This section shows you how to navigate the remote, and gives you
an understanding of the function of each adjustable setting.

3.1 Navigating the Remote

The ME-MR has menu items and adjustable settings that provide the ability to
confi gure your inverter/charger to your specifi c parameters.

Info: See Figure 4-1 for a complete map of the remote’s menu

items and adjustable settings.

The items on the remote’s front panel are used to fi nd, adjust, and save the
desired setting. They are:

• LCD Display – The LCD display shows menu items, adjustable settings,

and the meter’s display information.

Info: The LCD display returns to the scrolling Home screens to show

inverter status, DC voltage and current, and any fault present (if ap­plicable) after 30 seconds—if no buttons have been pressed.

Info: When the ”←” (left facing arrow) symbol is shown on the

display, it indicates that the displayed setting has been selected
and will be used.

• ON/OFF/CHANGE Button – Allows you to quickly scroll through and

select various menu items and settings after pressing the MENU button.

• MENU/HOME Button – Allows easy access to the menu items that can

help with confi guring, monitoring, and troubleshooting your inverter/
charger. Press and hold this button (2 seconds) to return to the scrolling
Home screens (Figure 3-1).

• SAVE/HOLD Button – Saves the menu item displayed on the screen. A

saved setting is denoted by the arrow symbol. Press and hold this button

(2 seconds) to stop the Home screens from scrolling (“HOLD” displays).

Press once to view the next Home screen. Press and hold again (2 sec-

onds) to resume scrolling of the Home screens (“SCROLL” displays).

Inverter/Charger

Status

STATUS
Invert

BATTERY

11.4V

Battery Voltage

Inverter/Charger

Fault

Note: Fault screen only appears if a fault has been detected

FAULT !
Low Batt

BATTERY

- 0A

Battery Current

Figure 3-1, Scrolling Home Screens

©2013 Magnum Energy, Inc. 5

3.0 Setup

3.2 Remote Menu Items

This section covers the function of each menu item and explains what con­fi gurable settings are available from each menu.

3.2.1 AC IN Menu

Use this menu as a quick means of changing your AC IN setting to coordinate

with the circuit breaker rating from the incoming AC source.

• AC IN – This selection ensures the inverter’s AC loads receive the maxi-

mum current available from the utility or your generator power. Whenever
the utility or generator is connected to the inverter, the current used to
power the AC loads and to charge the batteries is monitored. When the
total current used to power the AC loads and charge the batteries begins

to approach the AC IN setting, the current that was used for charging

the batteries will automatically be reduced. This ensures the AC loads
have all the available current when needed. The feature is not available
on MM and MMS Series inverter/chargers.

Default setting: AC IN = 30 Amps
Range: 5 Amps, 15 Amps, 30 Amps, 50 Amps

Where to set: Adjust the AC IN setting to match the current rating of the

utility power or the generator’s circuit breaker. If using multiple AC sources
(utility and generator) through an AC transfer switch, adjust this setting to
the smaller AC breaker size. This setting is dependent on the stability of the
AC source. If using a generator, factors such as altitude and output voltage
regulation may require a lower setting than the generator’s breaker size. If
the breaker on the AC source is tripping (because it is a weak breaker), try
reducing this setting to the next lower level.

Note: If the ME-MR is connected to a MSH-RE inverter, the AC IN setting
applies to both inputs (AC1 and AC2).

MENU

HOME

press

CAUTION: The AC IN setting does not limit the current to the

inverter loads. If the current to the loads on the output of the in­verter are greater than the circuit breaker rating on the incoming
AC source, you may experience nuisance tripping of this breaker.

Bottom line shows

current “saved” setting

AC IN

30 Amps

If this setting is correct,

press MENU button to

access different menu items

AC IN

5 Amps

AC IN

15 Amps

If a different setting

is required:

ON/OFF

CHANGE

press

AC IN

30 Amps

To save the current

setting displayed:

SAVE

HOLD

press

AC IN

50 Amps

Figure 3-2, AC IN Selections

6 ©2013 Magnum Energy, Inc.

3.0 Setup

3.2.2 Search Watts Menu

• SEARCH – This selection allows you to turn off the Search Watts feature,

or to adjust the power level to determine when the feature becomes

active. If this feature is not needed, select SEARCH = Off. When the

Search Watts feature is turned off, the inverter continuously provides
full AC voltage to the loads.

Default setting: SEARCH = 5 Watts
Range: Off, 5 Watts, 20 Watts

Info: When the Search Watts feature is active “Search” appears

on the bottom line of the LCD display, and the green INV LED will
slowly fl ash.

What is the Search Watts feature? This feature is used to help save bat-

tery power by reducing the inverter’s output to search pulses when there
is no detectable load. If someone turns on a load greater than the wattage
level setting while the inverter is searching, the inverter will start inverting
to provide full voltage on its output.

Should I use the Search Watts feature? If the inverter can spend a great

deal of time searching (to reduce the power drain on your batteries) and you
can tolerate small loads (less than 5 watts) from being on, then the Search
Watts feature should be used. However, if you require some small loads (e.g.,
digital clocks, satellite receivers, answering machines, etc.,) to always be on,

then this feature should be turned off (SEARCH = Off).
Where to set: The SEARCH Watts setting should be adjusted to the same

power level (or the next lower setting) of the smallest load that you want to
run. If you don’t know the wattage of the smallest load you want to run, turn

the switch for the load on and then decrease the SEARCH Watts setting until

the load comes on and stays on.

Example: You have reviewed all the loads you want to run and deter­mined that the smallest load is a 20 watt light. Set SEARCH = 20 Watt.

Whenever you turn on any load (because all the loads are greater than
20 watts), the inverter will stop searching and start inverting to deliver
power to the load.

Info: Even though the Search Watts feature is on, some connected

equipment may draw enough current even while off to keep the
inverter in Invert mode.

To save the current

setting displayed:

SAVE

HOLD

press

MENU

HOME

press

Bottom line shows

current “saved” setting

SEARCH

5 Watt

If this setting is correct,

press MENU button to

access different menu items

SEARCH

Off

SEARCH

5 Watt

If a different

setting is required:

ON/OFF

CHANGE

press

SEARCH

20 Watt

Figure 3-3, Search Watts Selections

©2013 Magnum Energy, Inc. 7

3.0 Setup

3.2.3 Battery Amp-Hours Menu

• BAT AHRS – This selection is used to select the approximate capacity

of the battery bank that is connected to the inverter (in battery amp­hours). This setting determines the time the battery charger is in the
Absorb Charging stage (i.e., absorption time). See Table 3-1 to correlate
the battery capacity to the absorption time.

Default setting: BAT AHRS = 400 AH
Range: 200 AH, 400 AH, 800 AH

Table 3-1, Battery Amp-Hrs to Absorb Charging Time

Battery Amp-Hours Selected Absorb Charging Time

Batt AmpHrs = 200 60 minutes

Batt AmpHrs = 400 90 minutes

Batt AmpHrs = 800 120 minutes

Where to set: Select the setting based on the 20-hour Amp-Hour (AH)

capacity of your battery bank.

How do I determine my battery AH capacity? The inverter requires deep

cycle batteries, which are specifi cally made for continuous use. Deep cycle
batteries are rated either by: a) amp-hours, or b) reserve capacity in minutes.

• Amp-hour (AH) capacity is a measurement of how many amps a battery
can deliver for a specifi ed length of time (usually 20 hrs) until the
voltage achieves 1.75 VDC/cell at 80° F.

• Reserve Capacity (RC) is a measure of how many minutes a battery can
deliver a certain amount of current (usually 25A) while maintaining a
voltage above 1.75 VDC/cell at 80° F.

Info: If using the Reserve Capacity (25A), the 20 hour AH capacity

can be estimated by multiplying ‘reserve capacity’ by 50%.

To save the current

setting displayed:

SAVE

HOLD

press

MENU

HOME

press

Bottom line shows

current “saved” setting

BAT AHRS

400 AH

If this setting is correct,

press MENU button to

access different menu items

BAT AHRS

200 AH

BAT AHRS

400 AH

If a different setting

is required:

ON/OFF

CHANGE

press

BAT AHRS

800 AH

Figure 3-4, Battery Amp-Hours Selections

Table 3-2 on the facing page provides an estimated 20 hour AH capacity
based on the group/code size, physical size, and the voltage of the battery.
If you are not sure of your battery’s 20 hour AH rating, consult your battery
manufacturer/dealer or use Table 3-2 to obtain an estimate.

8 ©2013 Magnum Energy, Inc.

3.0 Setup

Table 3-2, Battery Size to Battery Amp-Hours (estimated)

Group/

Code Size

GC-2 (Golf Cart) 10

L16 11

Group 22 9

Group 24 10

Group 27 12

Group 31 13 x 6

4D 20

8D 20

Physical Size

(L” x W” X H”)

3/8 x 7 13/16 x 10 5/8 6V 220 AHrs

11/16 x 7 x 16 11/16 6V 375 AHrs

1/2 x 6 7/8 x 8 5/16 12V 55 AHrs

1/4 x 6 13/16 x 8 7/8 12V 70 AHrs

1/16 x 6 13/16 x 8 7/8 12V 95 AHrs

13/16 x 9 7/16 12V 110 AHrs

3/4 x 8 3/4 x 9 7/8 12V 200 AHrs

3/4 x 11 1/8 x 9 7/8 12V 225 AHrs

Battery

Voltage

Battery AHrs

(20 hour rate)

Once you’ve determined the AH capacity of each battery, review how your
batteries are connected (parallel or series) to determine the total amp-hour
capacity of the battery bank.

Parallel connection

When batteries are connected in parallel (positive to positive, negative to
negative) they increase the amp-hour capacity of the battery bank, but the
voltage remains the same.

Example: You have a 12-volt battery bank with three 12-volt batteries

that are rated at 125 amp-hours (AH) each. Each of the positive terminals
are connected together and each of the negative terminals are connected
together, which means they are connected in parallel. The amp-hours of
each battery connected in parallel are added together (125 AH + 125 AH
+ 125 AH = 375 AH), but the voltage of the battery bank stays the same
(12 VDC).

Series connection

When batteries are connected in series (positive to negative) they increase
the voltage of the battery bank, but the amp-hour rate remains the same.

Example: You have a 12-volt battery bank with two 6-volt batteries

that are rated at 220 amp-hours (AH) each. The positive terminal of
the fi rst battery is connected to the negative terminal of the second
battery, which means these batteries are connected in series. Since the
two 6-volt batteries are connected in series, the voltage of the batteries
are added together to produce 12-volts (6 VDC + 6 VDC = 12 VDC), but
the amp-hour capacity of the battery bank does not change (220 AH).

In battery banks where you have batteries connected in series and in parallel
—the rules are the same. The batteries connected in series are referred to
as a “series string” and the amp-hour capacity doesn’t change. Each series
string is connected together in parallel to increase the amp-hour capacity.
Add the amp-hour capacity of each series string connected in parallel to
determine the total amp-hour capacity of the battery bank.

©2013 Magnum Energy, Inc. 9