Outback Power Systems GS8048 User Manual

Radian Series Inverter/Charger

GS8048

Operator’s Manual

About OutBack Power Technologies

OutBack Power Technologies is a leader in advanced energy conversion technology. Outback products include true sine wave inverter/chargers, maximum power point tracking charge controllers, and system communication components, as well as circuit breakers, accessories, and assembled systems.

Contact Information

Telephone:

Mailing Address: (North America)

E-mail:

Web Site:

+1.360.435.6030 +1.360.618.4363 (Technical Support) +1.360.435.6019 (Fax)

OutBack Power Technologies 5917 – 195 Arlington, WA 98223 USA

Support@outbackpower.com

www.outbackpower.com

Street N.E., #7

Address:

Sales, Marketing, & Warranty 6115 – 192nd Street NE Arlington, WA 98223 USA

Disclaimer

UNLESS SPECIFICALLY AGREED TO IN WRITING, OUTBACK POWER TECHNOLOGIES:

(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.

(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSS OR DAMAGE, WHETHER DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’S RISK.

Warranty Summary

OutBack Power Technologies Inc. warrants that the products it manufactures will be free from defects in materials and workmanship for a period of five (5) years subject to the conditions set forth in the warranty detail, found on page 51 of this manual.

OutBack Power Technologies cannot be responsible for system failure, damages, or injury resulting from improper installation of their products.

Notice of Copyright

Trademarks

OutBack Power is a registered trademark of OutBack Power Technologies.

Date and Revision

August 2011, Revision A (firmware revision 001.000.xxx)

Part Number

900-0020-01-00 Rev A

Important Safety Instructions

READ AND SAVE THESE INSTRUCTIONS!

This manual contains important safety instructions for the Radian Series Inverter/Charger. Read all instructions and cautionary markings on the inverter and on any accessories or additional equipment included in the installation. Failure to adhere to these instructions could result in severe shock or possible electrocution. Exercise extreme caution at all times to prevent accidents.

Audience

This manual is intended for anyone required to operate the Radian Series Inverter/Charger. Operators must be familiar with all the safety regulations pertaining to operating this kind of equipment as dictated by local code. Operators must also have a complete understanding of this equipment’s features and functions. Do not use this product unless it has been installed by a qualified installer in accordance with the Radian Series Inverter/Charger Installation Manual.

Symbols Used

WARNING: Hazard to Human Life

This type of notation indicates that the hazard could be harmful to human life.

CAUTION: Hazard to Equipment

This type of notation indicates that the hazard may cause damage to the equipment.

IMPORTANT:

This type of notation indicates that the information provided is important to the installation, operation and/or maintenance of the equipment. Failure to follow the recommendations in such a notation could result in voiding the equipment warranty.

Definitions

The following is a list of initials, terms, and definitions used in conjunction with this product.

Table 1 Terms and Definitions

Term Definition

12V AUX Auxiliary connection that supplies 12 Vdc to control external devices.

AC Alternating Current; refers to voltage produced by the inverter, utility grid, or generator

AGS Advanced Generator Start

CSA Canadian Standards Association; establishes Canadian national standards and the Canadian

Electrical Code, including C22.1 and C22.2

DC Direct Current; refers to voltage produced by the batteries or renewable source

900-0020-01-00 Rev A 1

Important Safety Instructions

Table 1 Terms and Definitions

Term Definition

DVM Digital Voltmeter

ETL Electrical Testing Laboratories; short for the company ETL Semko; refers to a certification issued by

ETL to OutBack products indicating that they meet certain UL standards

FCC Federal Communications Commission

GND Ground; a permanent conductive connection to earth for safety reasons; also known as Chassis

Ground, Protective Earth, PE, Grounding Electrode Conductor, and GEC

Grid-interactive, grid-intertie, grid-tie

HBX High Battery Transfer; a function of the remote system display

IEEE Institute of Electrical and Electronics Engineers; refers to a series of standards and practices for the

LBCO Low Battery Cut-Out; set point at which the inverter shuts down due to low voltage

LED Light-Emitting Diode

NEC National Electric Code

NEU AC Neutral; also known as Common

Off-grid

PV Photovoltaic

RELAY AUX Auxiliary connection that uses switch (relay) contacts to control external devices.

RTS Remote Temperature Sensor; accessory that measures battery temperature for charging

Split-phase A type of utility electrical system with 2 “hot” lines that are 120 Vac with respect to neutral and 240

System display Remote interface device (such as the MATE3), used for monitoring, programming and

Utility grid power is available for use and the inverter is a model capable of returning (selling) electricity back to the utility grid

testing of electrical products

Utility grid power

Vac between the “hot” lines; common in North America

communicating with the inverter; also called “remote system display”

available for use

is not

UL Underwriters Laboratories; refers to a set of safety standards governing electrical products

Utility grid The electrical service and infrastructure supported by the electrical or utility company; also called

“mains”, “utility service”, or “grid”

General Safety

WARNING: Limitations on Use

This equipment is NOT intended for use with life support equipment or other medical equipment or devices.

CAUTION: Equipment Damage

Only use components or accessories recommended or sold by OutBack Power Technologies or its authorized agents.

2 900-0020-01-00 Rev A

Table of Contents

Important Safety Instructions ........................................................................1

Audience .................................................................................................................................................................................1

Symbols Used ........................................................................................................................................................................1

Definitions...............................................................................................................................................................................1

General Safety .......................................................................................................................................................................2

Introduction.................................................................................................5

Welcome to OutBack Power Technologies.................................................................................................................5

MATE3 System Display and Controller .........................................................................................................................6

Commissioning ............................................................................................7

Functional Test......................................................................................................................................................................7

Pre-startup Procedures .................................................................................................................................................................. 7

Startup................................................................................................................................................................................................. 7

Powering Down................................................................................................................................................................................ 8

Adding New Devices.......................................................................................................................................................................8

Firmware Updates ...........................................................................................................................................................................8

Operation ....................................................................................................9

Input Modes ...........................................................................................................................................................................9

Generator............................................................................................................................................................................................9

Support..............................................................................................................................................................................................10

Grid Tied............................................................................................................................................................................................11

UPS (Uninterruptible Power Supply).......................................................................................................................................12

Backup ...............................................................................................................................................................................................13

Mini Grid............................................................................................................................................................................................13

Functions.............................................................................................................................................................................. 15

Inverting............................................................................................................................................................................................15

Search ................................................................................................................................................................................................16

Input...................................................................................................................................................................................................16

Generator..........................................................................................................................................................................................18

Transfer..............................................................................................................................................................................................18

Offset..................................................................................................................................................................................................19

Battery Charging ............................................................................................................................................................................20

Charging Steps................................................................................................................................................................................20

Equalization .....................................................................................................................................................................................24

Battery Temperature Compensation.......................................................................................................................................24

Multiple-Inverter Installations (Stacking)...............................................................................................................................26

Power Save Levels..........................................................................................................................................................................28

Auxiliary Terminals ........................................................................................................................................................................29

System Display-Based Functions................................................................................................................................. 32

Advanced Generator Start (AGS) ..............................................................................................................................................32

High Battery Transfer....................................................................................................................................................................32

Grid Use Time ..................................................................................................................................................................................32

Troubleshooting.........................................................................................33

Basic Troubleshooting..................................................................................................................................................... 33

Error Messages ...................................................................................................................................................................39

900-0020-01-00 Rev A 3

Table of Contents

Warning Messages............................................................................................................................................................ 40

Disconnect Messages ...................................................................................................................................................... 42

Sell Status............................................................................................................................................................................. 43

Specifications .............................................................................................45

Specifications for Model GS8048................................................................................................................................. 45

Environmental Specifications ....................................................................................................................................... 46

Regulatory Specifications............................................................................................................................................... 46

Firmware Revision............................................................................................................................................................. 47

Default Settings and Ranges......................................................................................................................................... 47

Product Registration ...................................................................................49

Extended Warranty........................................................................................................................................................... 50

Warranty....................................................................................................51

How to Arrange for Warranty Service ........................................................................................................................ 52

Contacting OutBack......................................................................................................................................................................52

Troubleshooting.............................................................................................................................................................................52

Return Material Authorization (RMA)......................................................................................................................................52

Returning Product to OutBack ..................................................................................................................................................53

Out of Warranty..............................................................................................................................................................................53

Index .........................................................................................................55

List of Tables

Table 1 Terms and Definitions ...................................................................................................................................................1

Table 2 Troubleshooting............................................................................................................................................................33

Table 3 Error Troubleshooting.................................................................................................................................................39

Table 4 Warning Troubleshooting..........................................................................................................................................40

Table 5 Disconnect Troubleshooting....................................................................................................................................42

Table 6 Sell Status Messages ....................................................................................................................................................43

Table 7 Electrical Specifications for Model GS8048..........................................................................................................45

Table 8 Mechanical Specifications for Model GS8048.....................................................................................................45

Table 9 Environmental Specifications for All Models.......................................................................................................46

Table 10 Radian Series Interconnection Response Times to Abnormal Voltages or Frequencies (per leg).....46

Table 11 GS8048 Inverter Settings............................................................................................................................................47

List of Figures

Figure 1 GS8048 Inverter/Charger .............................................................................................................................................5

Figure 2 MATE3 System Display and Controller.................................................................................................................... 6

Figure 3 Charging Stages Over Time ....................................................................................................................................21

Figure 4 Charging Stages Over Time (Generator mode) ..................................................................................................21

Figure 5 Repeated Charging Cycles.........................................................................................................................................23

Figure 6 OutBack HUB4 and MATE3 ........................................................................................................................................26

Figure 7 Example of Parallel Stacking Arrangement (Three Inverters)........................................................................27

Figure 8 AC Test Points ................................................................................................................................................................33

4 900-0020-01-00 Rev A

Introduction

Welcome to OutBack Power Technologies

Thank you for purchasing the OutBack Radian Series Inverter/Charger. This product offers a complete power conversion system between batteries and AC power. It can provide backup power, sell power back to the utility grid or provide complete stand-alone off-grid service.



Battery-to-AC inverting which delivers split-phase

120/240 Vac at 60 Hz



AC-to-battery charging from any AC source



Uses energy from photovoltaic arrays, wind turbines, and other renewable resources. Use of OutBack FLEXmax charge controllers will optimize power production from PV sources.



Dual AC inputs allow direct connection to utility grid and AC generator



Rapid transfer between AC source and inverter output with minimal delay time



Six selectable input modes for different applications

∼ Generator ∼ Support ∼ Grid Tied ∼ UPS (Uninterruptible Power Supply) ∼ Backup ∼ Mini Grid



8000 watts (8 kW) continuous power at 48 Vdc



16.97 kVA peak surge capacity



Stackable in parallel configuration up to 10 inverters



odular internal design allows low idle consumption and

high efficiency at both high and low power operation



Field-upgradeable firmware



Certified by ETL to UL1741 and CSA C22.2



Uses MATE3 System Display and Controller

Figure 1 GS8048 Inverter/Charger

IMPORTANT:

The Radian Series Inverter/Charger is not intended for use with the OutBack MATE or MATE2 System Display and Controller. It is only compatible with the MATE3 System Display and Controller.

900-0020-01-00 Rev A 5

Introduction

MATE3 System Display and Controller

The Radian inverter/charger has no external controls. It can operate normally without an external control or interface. Basic modes and settings are pre-programmed at the factory. (See page 47 for default settings.) The Radian inverter has no display or LED indicators. It is not possible to monitor its status or operating mode without a metering device.

The MATE3 System Display and Controller (sold separately) is an OutBack product designed to accommodate programming and monitoring of an OutBack power system. The MATE3 provides the means to adjust the factory default settings to correctly match the installation where needed. It also provides the means to monitor system performance and troubleshoot fault or shutdown conditions.

Once settings are modified using a MATE3, the MATE3 can be removed from the installation. The settings are stored in the non-volatile memory of the Radian. However, it is highly recommended to include a MATE3 as part of the system. This provides the means to monitor system performance and respond quickly should it be necessary to correct a fault or shutdown condition.

The MATE3’s Configuration Wizard is capable of automatically configuring inverters to a series of preset values. This is often more efficient than attempting to manually program each setting in each inverter. Affected fields include system type, battery charging, and AC source configuration. (For more information, see the MATE3 Owner’s Manual).

NOTE:

002.005.xxx or higher.

The Radian Series Inverter/Charger can only be used with MATE3 firmware revision

IMPORTANT:

Some functions are not based in the inverter, but are part of the MATE3 system display’s firmware. They will not function if the system display is removed. These functions are listed beginning on page 32. For a detailed description of functions and programming, please see the MATE3 Owner’s Manual.

Figure 2 MATE3 System Display and Controller

6 900-0020-01-00 Rev A

Commissioning

Functional Test

WARNING: Shock Hazard and Equipment Damage

It is necessary to remove the cover of the Radian inverter to perform these tests. The components are close together and carry hazardous voltages. Use appropriate care to avoid the risk of electric shock or equipment damage.

Pre-startup Procedures

1. Ensure all DC and AC overcurrent devices are opened, disconnected, or turned off.

2. Double-check all wiring connections.

3. Inspect the work area to ensure tools or debris have not been left inside.

4. Using a digital voltmeter (DVM) or standard voltmeter, verify battery voltage. Confirm the

voltage is correct for the inverter model. Confirm the polarity.

5. Connect the MATE3 system display, if present.

CAUTION: Equipment Damage

Incorrect battery polarity will damage the inverter. Excessive battery voltage also may damage the inverter. This damage is not covered by the warranty.

Startup

If steps are inapplicable, they can be omitted. However, it is highly recommended that all applicable steps be performed in the following order.

If the results of any step do not match the description, see the Troubleshooting section on page 33.

To start the system:

1. Close the main DC circuit breakers (or connect the fuses) from the battery bank to the inverter.

Repeat for every inverter present.

2. Confirm that the MATE3 is operational, if present. (See the MATE3 Owner’s Manual for a

description of the menu items that appear on a correctly functioning display.)

3. Turn on the inverter using the MATE3 or external switch. Unlike previous OutBack inverters, this

product’s default condition is Off.

4. Using a DVM, verify 120 Vac between the L1 OUT and NEU terminals, and between the L2 OUT and

NEU terminals. Verify 240 Vac between the L1 OUT and L2 OUT terminals. Do not turn on any AC circuit breakers at this time. (See page 33 for an illustration of AC test points.)

5. Using the MATE3, perform all programming for input modes, stacking, battery charging, AC

current, generator starting, and any other functions. Refer to the Input Modes section beginning on page 9 and the Functions section beginning on page 15. Also refer to the MATE3 Owner’s Manual and any other literature as needed.

900-0020-01-00 Rev A 7

Commissioning

After programming (if any) is completed, perform the following steps:

1. If other inverters are on the system, use a DVM to verify correct voltage from the L1 OUT terminal

on one inverter to the next. When stacked in parallel, the wires from one inverter to the next should read 0 Vac (although individually they should still read 120 Vac with respect to neutral). Repeat for the L2 OUT terminal.

2. Close the AC output circuit breakers. If AC bypass switches are present, place them in the normal

(non-bypass) position. Do not connect an AC input source or close any AC input circuits.

3. Use a DVM to verify correct voltage at the AC load panel.

4. Connect a small AC load and test for proper functionality.

5. Close the AC input circuit breakers and connect an AC source. Using a DVM, check the appropriate

L1 and L2 IN terminals for 120 and 240 Vac. If a MATE3 system display is present, confirm that the inverter accepts the AC source as appropriate for its programming. Check the system display indicators for correct behavior.

6. If the battery charger has been enabled, confirm that it is charging by using the MATE3. The

inverter will perform a full battery charge when first powered up. This may take several hours. If restarted after a temporary shutdown, the inverter may skip most or all of the charging cycle.

7. Test other functions which have been enabled, such as generator start, selling, or search mode.

8. Compare the DVM’s readings with the MATE3 meter readings. If necessary, the system display’s

readings can be calibrated to match the DVM more accurately. AC input voltage, AC output voltage, and battery voltage can be calibrated.

Powering Down

If steps are inapplicable, they can be omitted. However, it is highly recommended that all applicable steps be performed in the following order.

To Power Down the System:

1. Turn off all load circuits and AC input sources.

2. Turn off all renewable energy circuits.

3. Turn each inverter OFF using the MATE3 system display or external switch.

4. Turn off the main DC overcurrent devices for each inverter.

Adding New Devices

When adding new devices to the system, first power down the system according to the preceding instructions. After adding new devices, perform another functional test, including programming.

Firmware Updates

Updates to the Radian’s internal programming are periodically available. If multiple inverters are used in a system, all units must be upgraded at the same time. See the MATE3 Owner’s Manual for details.

IMPORTANT:

All inverters will shut down during software updates. If it is necessary to run loads while updating the firmware, bypass the inverter with a maintenance bypass switch (if present). During this time, communication cables must remain connected and DC power must remain on. Lack of network communication will cause the update to fail and the inverter(s) may not work afterward. Inverters automatically update one at a time. Updating each inverter requires about 5 minutes.

8 900-0020-01-00 Rev A

Operation

Input Modes

The Radian inverter has two sets of input connections for multiple AC sources. (See the Radian Series Inverter/Charger Installation Manual for more information.) With the MATE3, each input can be

programmed to a particular operating mode. Six modes are available, each with certain advantages which make it ideal for a particular application. Some modes contain functions unique to that mode.

Both of the Radian’s inputs can be programmed for separate modes. The mode for the “Grid” input can be set in the

Gen AC Input Mode and Limits

Grid AC Input Mode and Limits

menu.

menu. The second, “Gen”, input can be set in the

NOTE:

because of inverter requirements. Each input can accept any AC source as long as it meets the requirements of the Radian inverter and the selected input mode. If necessary, the accept grid power. The opposite is also true.

When multiple inverters are stacked together (see page 26), the master inverter’s input mode is imposed on all slave inverters. The slave menu settings are not changed; they retain any input mode that was previously programmed. However, the slave will ignore its own input mode and use that of the master. This also applies to any parameters in the mode menu ( so on).

The following pages compare the various features of each input mode.

The input terminals are labeled for grid and generator due to common conventions, not

terminals can

Gen

Voltage Limit, Connect Delay

, and

Generator

This mode allows the use of any generator, even one with a rough or imperfect AC waveform. In other modes, a “noisy” or irregular waveform may not be accepted by the inverter. This mode allows these waveforms to be accepted. The charging algorithm of this mode is designed to work well with any AC generator regardless of power quality or regulation mechanism. The generator must still comply with the inverter’s nominal input specifications in the Input section of this manual. See page 16.

CHARGING

In this mode, when the charger is enabled, the Radian will use the AC source to charge the battery bank. (See page 20.) It will proceed through the battery charging cycle until it reaches the Float stage. It will then remain in the Float stage and maintain the batteries for as long as the AC source is present.

BENEFITS:



The Radian inverter will charge the batteries from the generator even when the generator is undersized, of low quality, or has other problems. The recommended parameters for sizing a generator are listed on page 18.



In cases where utility grid power is unstable or unreliable, accept the power.



This mode has a programmable delay time which will allow a generator to stabilize before connection. In the MATE3, this menu item is

Gen AC Input Mode and Limits

900-0020-01-00 Rev A 9

Generator

Connect Delay

menu, depending on which input is being programmed.

. It is available in either the

mode may allow the Radian inverter to

Grid AC Input Mode and Limits

or the

Operation

NOTES

 

The Support, Offset, and grid-interactive functions of the Radian are unavailable in this mode.

Any AC fluctuations that are accepted by the inverter will be transferred to the output. The loads will be exposed to these fluctuations. It may not be advisable to install senstive loads under these conditions.

In this mode, the Radian inverter’s maximum charge rate is limited to 20 Aac (80 Adc).

While charging, the charger will not go silent (see page 22). After completing the charge, it will remain in the Float charging stage unless this generator is stopped (either automatically or manually) or AC input power is otherwise removed.

Support

This mode is intended for systems that use the utility grid or a generator. In some cases, the amount of current available from the source is limited due to size, wiring, or other reasons. If large loads need to be run, the Radian inverter augments (supports) the AC source, adding inverter and battery power to ensure that the loads receive the power they demand.

In the MATE3 system display, the input. The

Gen Input AC Limit

sets the maximum draw for the Gen input. This function takes effect if

Grid Input AC Limit

dictates the maximum AC draw for the Grid

the AC draw on the appropriate input exceeds its setting.

CHARGING

In this mode, when the charger is enabled, the Radian will use the AC source to charge the battery bank. (See page 20.) It will proceed through the entire battery charging cycle. After the end of the Float timer, it will continue to alternate between Silent and Re-Float stages.

BENEFITS



The large loads on the system can be powered while staying connected to the input, even if the input is limited. Battery power prevents overload of the input source, while at the same time limiting the amount of battery power used.



In this mode, the inverter will offset the loads with excess renewable energy if it is available from the batteries. (See page 19 for more information on the Offset function.)



This mode has a programmable delay time which will allow an AC source to stabilize before connection. In the MATE3, this menu item is the

NOTES

Connect Delay

Gen AC Input Mode and Limits

IMPORTANT:

If the AC loads exceed the amperage limit setting, the inverter will draw energy from the batteries. If the loads are sustained, the batteries may discharge to the point of Low Battery Cut-Out and the inverter may shut down with a Low Battery error. (See pages 15 and 39.) To prevent the loss of backup power, load use should be planned accordingly.

. It is available in either the

menu, depending on which input is being programmed.

Grid AC Input Mode and Limits



The grid-interactive function of the Radian inverter is unavailable in this mode.



Because the inverter limits the current draw from the AC source, it will reduce the charge rate as necessary to support the loads. If the loads equal the amperage setting, the charge rate will be zero.



If the AC loads

the batteries and use it to support the incoming AC current.

from

10 900-0020-01-00 Rev A

exceed

the amperage setting, the charger will begin operating in reverse. It will take power

Operation

Grid Tied

IMPORTANT:

Selling power to the utility company requires the authorization of the local electric jurisdiction. The method used by the local utility company to accommodate this will depend on their policies on this issue. Some may pay for power sold; others may issue credit. Some policies may prohibit the use of this mode altogether. Please check with the utility company and obtain their

permission before using this mode.

The Grid Tied mode allows the Radian inverter to become grid-interactive. This means that in addition to using power from the utility grid for charging and loads, it can also convert excess battery power and sell it to the utility grid. Excess battery power usually comes from renewable energy sources, such as PV arrays, hydroelectric turbines, and wind turbines.

In this mode, the inverter will offset the loads with excess renewable energy if it is available from the batteries. (See page 19 for more information on the Offset function.) If additional energy is available beyond what is consumed by the loads, the energy will be sold to the utility grid.

The grid-interactive function is referenced heavily in the Battery Charging section, as it is integrally tied with the battery charger. Where the charger draws power from the AC input and puts it into the batteries, the grid-interactive function removes power from the batteries (or the DC system) and returns it to the AC input. When a renewable source of energy raises the batteries above a designated reference point (or “target”), the inverter exports power in order to bring the voltage back down or to prevent it from rising further.



The inverter uses several set points as targets for selling, particularly the battery charger settings. In the MATE3, the



If the battery charger is not active, the target voltage used by the Radian inverter is

Grid-Tie Sell

Manual to change any of these settings.)



Unlike the other target voltages, the Radian inverter cannot import AC power to raise the batteries to the

Sell Voltage

CHARGING

Absorb Voltage, Float Voltage

menu. (See page 21 for more information on charging and selling. See the MATE3 Owner’s

set point. It can only use excess DC power, if it is available, and export it as AC power.

, and

Equalize Voltage

settings are all used as target voltages.

Sell Voltage

in the

BENEFITS



The most obvious advantage of this mode is the ability to return power to the utility grid.

NOTES



The Support function of the Radian inverter is unavailable in this mode.



The inverter has a minimum five-minute delay before selling will begin. Upon initial connection to the utility grid, the inverter may be required to perform a full battery charge. This may delay the operation of the grid-interactive feature.



The grid-interactive function only operates when excess DC (renewable) power is available.

900-0020-01-00 Rev A 11

Operation



The grid-interactive function can only operate while the utility grid power is stable and within specific limits.

 If the AC voltage or frequency vary outside these limits, the inverter will stop selling. If the inverter

stops selling, the MATE3 will show the reason. Sell Status messages are listed on page 43.

 If the AC voltage or frequency vary outside the maximum limits, the inverter will also disconnect from

the utility grid. The Radian inverter’s grid-interactive limits are specified on page 46. The AC source acceptance limits are specified on page 17. These numbers are not necessarily the same.



When power is returned to the utility grid, it may possible to make the utility meter run backwards. The net result would be to sell power to the utility company. However, this depends on whether there are other loads in the system. Loads on the main panel (not on the inverter’s output) may consume this power as fast as it is generated, preventing the meter from running backwards. In this case, the result of selling would be to reduce the consumption of AC power, not reverse it.



The amount of power an inverter can sell is not equal to its specified output wattage. Its maximum selling output is 7.68 kW. However, output will vary with inverter temperature, battery type, and other conditions.

 A good guideline is that the renewable source should be sized to continuously deliver no more than

85% of the inverter’s specified wattage (per inverter, in a multi-inverter system).

 This recommendation is specifically for the inverter’s grid-interactive feature. In some cases, the source

may be sized larger to account for environmental conditions or the presence of DC loads. This depends on individual site requirements.

UPS (Uninterruptible Power Supply)

In the event of utility grid failure, UPS mode allows the inverter to switch to its inverting mode almost instantaneously. This allows the system to support sensitive AC loads without interruption.

The transfer speed in this mode has been reduced so that if the AC input power is disconnected or a scheduled disconnect occurs, the transfer speed will be less than 4 milliseconds.

CHARGING

BENEFITS



This mode will maintain constant power to the loads with virtually no drop in voltage or current.



In this mode, the inverter will offset the loads with excess renewable energy if it is available from the batteries. (See page 19 for more information on the Offset function.)

NOTES



The Support and grid-interactive functions of the Radian inverter are unavailable in this mode.



Due to the need for the Radian inverter to react quickly to AC source fluctuations, it must remain fully active at all times. The inverter requires a continuous consumption of 42 watts.

12 900-0020-01-00 Rev A

Operation

Backup

This mode is intended for systems that have utility grid available as the primary AC source. This source will pass through the Radian inverter’s transfer circuit and will power the loads unless utility power is lost. If utility grid power is lost, then the Radian inverter will supply energy to the loads from the battery bank. When the utility power returns, it will be used to power the loads again.

CHARGING

BENEFITS



In this mode, the inverter will offset the loads with excess renewable energy if it is available from the batteries. (See page 19 for more information on the Offset function.)



This mode will continuously maintain the batteries in a fully-charged state, unlike the Support mode, and does not have the overhead consumption of the UPS mode.

NOTES



The Support and grid-interactive functions of the Radian inverter are unavailable in this mode.

Mini Grid

The Radian inverter can be programmed to automatically reject an AC source and run solely from battery (and renewable) energy. In (usually the utility grid) when the batteries run too low.

In this mode, the Radian inverter runs on battery-supplied power for as long as the batteries can be sustained. It is expected that the batteries will also be charged from renewable sources such as PV. When the batteries become depleted, the system reconnects to the utility grid to operate the loads.

Mini Grid

mode, the inverter only connects to the AC source

The inverter will reconnect to the utility grid if the battery voltage decreases to either the

Voltage

grid, if the charger is turned off, the Radian will use its transfer circuit to send grid power to the loads. If the charger is turned on, it will use the grid to charge the battery, as well as powering the loads.

While connected to the utility grid, any excess energy from the renewable source will be sent to the loads and used to “offset” the use of grid power. When the renewable energy is equal to or greater than the load demand, the utility grid will no longer be required. The Radian inverter will then disconnect from the utility grid and begin running from batteries again. It will not disconnect until these conditions are met.

CHARGING

In this mode, the Radian inverter will wait for the batteries to pass through the charging stages until certain internal charger settings are met (see below). This is true regardless of whether the Radian or the renewable source is charging. This means that the regulator for the renewable source must be set to the same settings as the Radian (or higher). See the MATE3 Owner’s Manual to locate the exact settings of the Radian inverter.

If the reconnection was triggered by the batteries to pass through the

900-0020-01-00 Rev A 13

set point (see page 22), or the Rebulk voltage (see page 23). Once it reconnects to the utility

Re-Float Voltage

Float Voltage

and

Float Time

set point, the inverter will only require the

settings (as well as Offset.) The inverter

Re-Float

Operation

will then enter Silent (see page 22) and continue repeating this part of the charging cycle until it disconnects from the utility grid.

If the reconnection was triggered by the Rebulk voltage setting, the inverter will require the charger to pass through the entire charge cycle, including the

Float Time

settings (as well as Offset). The inverter will continue repeating the Float part of the

Absorb Voltage, Absorb Time, Float Voltage

charging cycle until it disconnects from the utility grid.

See page 20 for more information on the battery charging cycle.

, and

BENEFITS



Mini Grid

can be minimized or eliminated.



In this mode, the inverter will offset the loads with excess renewable energy if it is available from the batteries. (See the previous page and page 19 for more information on the Offset function.)



This mode is similar to to the high-battery transfer (HBX) mode used by the MATE3 system display, but it has several differences (see below).

NOTES



The Support and grid-interactive functions of the Radian inverter are unavailable in this mode.



This mode has similar priorities to the high-battery transfer (HBX) mode used by the MATE3 system display. However, it is not compatible with HBX mode and cannot be used at the same time. When using mode, HBX mode should be disabled to prevent conflicts.



When deciding whether to use

 Mini Grid logic is based in the Radian inverter and can function in the absence of the MATE3. HBX logic

is based in the MATE3 and cannot function unless the MATE3 is installed and operating.

 Mini Grid can use utility grid power to fully recharge the batteries on reconnection. HBX can only do so

under specific circumstances.

 HBX set points have a wide range of settings. Mini Grid uses settings which tend to prevent the

 HBX works more efficiently when the renewable source is larger, but there is no specific requirement for

renewable size. Mini Grid is unable to work properly unless the renewable source is larger than the size of the loads. (See previous page.) If this condition is not met, Mini Grid will not disconnect the inverter from the utility grid.

 HBX can be combined with the settings of any other Radian input mode (Generator, UPS, etc.). The

Mini Grid input mode is naturally limited to its own settings and does not have access to certain functions of other modes. (See the first bullet above.)

 See page 32 and the MATE3 Owner’s Manual for more information on HBX.

mode allows a system to take full advantage of renewable energy. Dependence on the utility grid

Mini Grid

batteries from excessive discharge; however, most of its settings are automatic and do not allow customization.

mode or HBX, the user should consider various advantages of each.

14 900-0020-01-00 Rev A

Operation

Functions

The items in this section are states of operation common to all Radian inverters. These functions can be used in most or all of the input modes described in the preceding section. Some can be manually selected or enabled; others are automatic.

All items identified as settable or adjustable have set points which can be accessed using the remote system display. (See the MATE3 Owner’s Manual for instructions on locating these set points.) The default settings and ranges of adjustment are listed beginning on page 47 of this manual.

Inverting

The Radian inverter converts DC voltage from batteries into AC voltage that is usable by AC appliances. It will continue to do this as long as the batteries have sufficient energy. The batteries can be supplied or recharged from other sources, such as solar, wind, or hydroelectric power.

The inverter’s design uses two transformers and two high-frequency H-Bridge FET modules to achieve the required high-wattage output. When not in use, the dual design allows half the inverter to shut down for lower idle consumption.

The Radian inverter requires batteries to operate

that are consistent enough for the inverter to operate reliably.

. Other sources may not maintain DC voltages

CAUTION: Equipment Damage

Do not substitute other DC sources in place of the batteries. High or irregular voltages may damage the inverter. It is normal to use other DC sources in conjunction with the batteries and the inverter, but not in place of the batteries.

Certain features will affect the inverter’s operation. These features only operate when the inverter is generating AC power on its own. They do not function when the inverter is being supplied by an AC source.



Low Battery Cut-Out

functioning and give a This appears as an Event on the MATE3 system display, as described in the MATE3 Owner’s Manual. It is one of the Error messages described on page 39. This function is intended to protect both the batteries and the inverter’s output. (Continuing to invert on a low DC voltage may produce a distorted waveform.) This item is adjustable.



Low Battery Cut-In

specified level for 10 minutes, the low battery error will clear and the inverter will resume functioning. This item is adjustable.

 Connecting an AC source to charge the batteries will also clear a low battery error.



Output Voltage

for conditions. This item is adjustable.



The inverter is also controlled by a high battery cut-out function. If the DC voltage rises above a specified level, the inverter will immediately stop functioning and give a Event on the MATE3 system display, as described in the MATE3 Owner’s Manual. This is one of the Error messages displayed on page 39 of this manual. (If the voltage drops below this point, the inverter automatically recovers.)

For the standard GS8048 inverter, the high battery cut-out voltage is 68 volts. It cannot be changed.

This function is intended to protect the inverter’s output and loads. Continuing to invert on a high DC voltage may produce a distorted waveform. Note that the inverter’s high battery cut-out does not alleviate or solve the high battery condition itself; the cause is an external condition.

900-0020-01-00 Rev A 15

: This feature prevents the inverter from draining the batteries completely. It will stop

Low Battery V

: The recovery point from Low Battery Cut-Out. When the DC voltage rises above a

: The inverter’s AC output voltage can be adjusted up or down by a certain amount, to allow

error when the DC voltage drops below a specified level for 5 minutes.

High Battery V

error. This appears as an

Operation

An automated search circuit is available to minimize the power draw when no loads are present. When enabled, the inverter does not always deliver full output. The output is reduced to brief pulses with a delay between them. These pulses are sent down the output lines to see if a resistance is present. Basically, the pulses “search” for a load. If a load is detected on either the L1 or L2 outputs, the inverter’s output increases to full voltage so that it can power the load. When the load is turned off, the inverter “goes to sleep” and begins searching again.

The sensitivity of Search mode is in increments of approximately 0.1 Aac. The default is 6 increments, or about 0.6 Aac. A load which draws this amount or greater will “wake up” the inverter.

NOTE:

Due to load characteristics, these increments are only approximate and may not function

exactly as listed.

The pulse duration and the delay both have a time period that is measured in AC cycles. These two items and the load detection threshold are adjustable.



Search mode may not be useful in larger systems with loads that require continuous power (e.g., clocks, answering machines, fax machines). Search mode may cause nuisance shutdowns, or it may sleep so rarely that there is no benefit.



Some devices may not be easily detected by Search mode.

Input

When the Radian inverter input terminals are connected to a stable AC source, the inverter will synchronize itself with that source and use it as the primary source of AC power. (See AC Source Acceptance on page 17.) Its transfer relay will engage, linking the AC source directly with the inverter’s output. It can also use the source to charge batteries. (See Transfer on page 18 and Battery Charging on page 20.)



Two sets of AC input terminals are available. Both inputs are identical and can be used for any AC source. However, for easy reference, the first input has been labeled GRID (for the utility grid). The second input is labeled GEN (for a generator). These designations are also used in the menus of the MATE3 system display. Each input has a separate set of input criteria and input modes. The programming for each input also has identical content.



The independent inputs are intended to simplify the connection to multiple AC sources; however, only one input can be used at a time. If both inputs are powered, the default setting is for the inverter to accept the GRID input. This can be changed. In the MATE3 system display, these priorities are selected using

Priority



Six input modes are available which affect the Radian inverter’s interactions with AC input sources. The

Grid Tied

battery power to assist a smaller AC source. See page 9 for descriptions of these and other input modes.



There are a number of considerations when selecting the type and size of an AC generator. (See the section entitled Generator on page 18.)



The AC input current is used to power both loads and battery charging. The combined amount should not exceed the size of the AC overcurrent device or AC source. These devices should be sized appropriately during planning. (See AC Current Settings on the next page. See the Radian Series Inverter/Charger Installation Manual for more information.)



The loads powered by the inverter entitled “Transfer” on page 18.)

in the

AC Input and Current Limit

mode allows the Radian to sell power using the input connection. The

must not

menu.

Support

exceed the size of the inverter’s transfer relay. (See the section

mode can use

Input

CAUTION: Equipment Damage

Current draw in excess of the inverter’s transfer relay rating can damage the transfer relay. This damage is not covered by warranty.

16 900-0020-01-00 Rev A

Operation

AC Current Settings

The AC current settings control the amount of current that the inverter draws from the source(s). The amount of current is controlled by the grid or generator limit settings. These settings should be adjusted to match the size of the input circuit breaker. In the MATE3 system display, if the

Input Priority

If the menus are set to



This is intended to protect a generator or source that may not be large enough to supply enough current for both charging and loads. If the combined charging and loads exceed this setting, the inverter will reduce its charge rate and give priority to the loads. If the loads exceed this number on their own, the charge rate will be reduced to zero.



The

Support

See page 10.



If multiple parallel inverters are installed with an AC source of limited amperage, the total combined amperage settings for all units must be less than the AC input circuit. The Configuration Wizard in the MATE3 can perform this calculation. However, the inverters do not perform this calculation. If the MATE3 or the Configuration Wizard are not used, it is necessary to divide the input size by the number of inverters and assign an equal part of the amperage to each port.

AC Input and Current Limit

input mode allows the Radian inverter to support the AC source with power from the batteries.

menus are set to

, the inverter uses the generator settings.

Gen

Inverter

, the inverter uses the grid settings.

Grid

AC Source Acceptance

The input source must meet the following specifications to be accepted:

 L1 (to neutral) 120 Vac, ± 12 Vac (default setting), and  L2 (to neutral) 120 Vac, ± 12 Vac (default setting), and  60 Hz, ± 6 Hz

When these conditions are met, the inverter will close its transfer relay and accept the input source. This occurs after a delay which is specified below. If the conditions are not met, the inverter will not accept the source. If it was previously accepted and then rejected, the inverter will open the relay and return to inverting power from the batteries.



The voltage limits can be adjusted to allow (or exclude) a source with weak or irregular voltages. These items are adjustable in the appropriate menu of the MATE3 (

Input Mode and Limits

adjusted, it applies equally to L1 and L2.

There can be side effects to changing the range of allowed voltages. See page 18.



Each of the AC inputs has a settable connection delay. This is intended as a warmup period which allows an input source to stabilize before connection.

 The default setting for the Grid input is 0.2 minutes (12 seconds).  The default setting for the Gen input is 0.5 minutes (30 seconds).

These items are adjustable in the appropriate menu of the MATE3 (Grid AC Input Mode and Limits or Gen AC Input Mode and Limits).

). The settings are titled

Voltage Limit Lower

Grid AC Input Mode and Limits

and

. When this setting is

Upper

Gen AC

NOTES:



Certain input modes conditions are met. (See page 13.)



Several items external to the inverter may prevent the inverter from accepting AC power even if electrical conditions are met. One is the High Battery Transfer mode, which is operated by the MATE3 system display. (See page 32 and the MATE3 Owner’s Manual.) Another is the MATE3’s order all inverters to disconnect when set to



The inverter has additional criteria that control whether it sells power. The inverter may accept AC power but refuse to sell if the acceptance criteria are met, but the grid-interactive criteria are not. (See the input mode on page 11.)

uch as

Mini Grid

may prevent the inverter from accepting AC power even if electrical

hot key menu, which can

Grid Tied

. (See the MATE3 manual.)

Drop

AC INPUT

900-0020-01-00 Rev A 17

Operation

Generator

A generator should be sized to provide enough power for all inverters, both for loads and for battery charging.

It is usually recommended that the generator be sized at twice the wattage of the inverter system. Many generators may not be able to maintain AC voltage or frequency for long periods of time if they are loaded more than 80% of rated capacity.

The generator is required to have a stable output before its power is accepted by the inverter. Some generators with less stable or uneven outputs may not be accepted. The use of the mode may assist with this problem.

Generator

input

Transfer

The inverter uses a transfer relay to alternate between the states of inverting and of accepting an AC source. Until the relay energizes, the L1 and L2 output terminals are electrically isolated from the input that is in use. When it closes, the L1 input and output terminals become electrically common. The same is true for the L2 input and output terminals. (The terminals for the unused input remain isolated during this time.) When the relay changes states, the physical transfer delay is approximately 12 milliseconds (with the exception of the

input mode).

UPS

The relay contacts are limited to 55 amps per phase or leg. The continuous loads on that output should never exceed this number. When connected to an AC source, the Radian inverter cannot limit the load current. An overload condition is possible.

CAUTION: Equipment Damage

Current draw in excess of the inverter’s transfer relay rating can damage the transfer relay. This damage is not covered by warranty.

The inverter does not filter or clean up the power from the AC source. The voltage and power quality received by the output loads is the same as that of the source. If the voltage or quality do not meet the inverter’s input requirements (see page 17), it will disconnect and return to the inverting mode.



If the AC source meets the inverter’s requirements but is irregular, any fluctuations will be transferred to the loads. If the loads are sensitive, it may be necessary to improve the quality of the AC source.



To ensure a smoother transition, it may be advisable to raise the inverter’s lower acceptance limit. The default setting is 108 Vac on each leg. A higher setting will cause the inverter to transfer sooner in the event of a quality problem.



The

Generator

than other modes. Since it will transfer the irregular power to the output as noted above, this should be considered before using this mode with sensitive loads. (See page 9.)

In a stacked system, slaves are ordered to transfer at the same time as the master. If a slave does not sense an AC source at the same time as the master, it will continue inverting, and will experience a

Phase Loss

in the MATE3 Owner’s Manual.

input mode is intended to accept irregular or unfiltered AC sources and is more likely to do so

error (see page 39). This appears as an Event on the MATE3 system display, as described

18 900-0020-01-00 Rev A

Operation

Offset

This function is designed to use excess battery energy to power the loads, even when an AC source is present. This allows the system to take advantage of renewable energy sources, in effect “offsetting” dependence on the AC source.

When a renewable source of energy raises the batteries above a designated reference point (or “target”), the inverter exports power to the loads in order to bring the voltage back down or to prevent it from rising further.

The inverter uses several set points as targets for the offset function, particularly the battery charger settings. In the MATE3, the

Absorb Voltage, Float Voltage

as reference voltages. While the battery charger is operating, it will regulate the voltage at a level appropriate for the target setting.

If none of the battery charger’s timers are active, the target voltage used by the Radian inverter is

Sell Voltage

in the

Grid-Tie Sell

import AC power to raise the batteries to the

menu. Unlike the other target voltages, the Radian inverter cannot

Sell Voltage

if it is available, and export it as AC power.

(See page 21 for more information on how Offset relates to the battery charger. See the MATE3 Owner’s Manual to change any of these settings.)

, and

Equalize Voltage

settings are all used

set point. It can only use excess DC power,

NOTES



If the Radian inverter is in the offset by the loads, the inverter will sell the remainder to the utility grid. Although the inverter can use the

Sell Voltage

unless the

If the inverter is in the available than can be offset by the loads, it means the inverter is capable of running all of its loads using renewable energy. The inverter will disconnect from the AC source as long as the excess renewable energy is present.

The Offset function is not active when the

setting as a target in most input modes (see below), it is unable to sell power to the utility grid

Grid Tied

mode is selected.

Support, UPS, Backup

Grid Tied

input mode and more renewable energy is available than can be

, or

Mini Grid

Generator

input modes and more renewable energy is

input mode is selected.

900-0020-01-00 Rev A 19

Operation

Battery Charging

IMPORTANT:

Battery charger settings need to be correct for a given battery type. Always follow battery manufacturer recommendations. Making incorrect settings, or leaving them at factory default settings, may cause the batteries to be undercharged or overcharged.

The inverter uses a “three-stage” battery charging process. The three stages are Bulk, Absorption, and Float. These stages follow a series of steps, which are shown on graphs (see page 21).

NOTES



The process shown in Figure 3 also includes the step of selling power back to the utility, as this is integrally tied with the battery charger. This step, and Figure 3, are only applicable when the Radian inverter is in the

Grid Tied

The process shown in Figure 4 eliminates Silent, Float Timer, and other parts of the process. Figure 4 is only applicable when the Radian inverter is in the

The target points and time limits cited under various steps are also used by the inverter’s Offset function. (See page 19.) These items are settable using the MATE3 system display. (See the MATE3 Owner’s Manual.)

input mode.

Generator

input mode.

Charging Steps

No Charging

If the inverter is not charging, any of the following conditions may apply:



The unit is inverting or not connected to a qualified AC source.



The unit is connected to an AC source but is in a mode or stage that does not use the charger. (Silent mode is one example.)



The unit is connected to an AC source but the charger has been turned off.

Bulk Stage

This stage activates the charger. This is the first stage in the three-stage charge cycle. It is a constant-current stage which drives the battery voltage up. This stage typically leaves the batteries at 75% – 90% of their capacity, depending on conditions.

Target point:

The initial DC current is the maximum current the charger can deliver. It will begin at the charger’s specified maximum, but will gradually decrease as the voltage increases. This is a tradeoff in wattage and is normal for the charger.

Absorb Voltage

setting. The default setting is 57.6 Vdc.

Absorption Stage

This is the second stage of charging. It is a constant-voltage stage. Current varies as needed to maintain the voltage, but will typically decrease to a very low number over time. This “tops off the tank”, leaving the batteries at essentially 100% of capacity.

Target point: Time limit:

Absorb Voltage

Absorb Time

until it reaches zero. The timer can be viewed. (See the MATE3 manual.)

For multiple inverters only:

The charging of multiple stacked inverters is synchronized and is governed by the master. When the master inverter reaches the end of Absorption (and other stages), the slaves will exit Absorption as

20 900-0020-01-00 Rev A

setting.

setting. This timer counts down from the inception of the Absorption stage

Voltage

Operation

Absorption Set Point

Float Set Point Sell Set Point

Re-Float Set Point

Bul

Charge

Voltage

Absorption Set Point

Float Set Point

Bul

Charge

Absorption

Time

Absorption

Time

Offset

Silent

Float

Float Timer

Figure 3 Charging Stages Over Time

Float

Silent

Offset

No Charge

Figure 4 Charging Stages Over Time1 (Generator mode)

well, even if their timers have not expired. The remaining time for the slaves will be retained in the timer for each inverter.

The Absorption timer does not reset to zero when AC power is disconnected or reconnected. It only resets to zero if it runs out, or if an external STOP BULK command is sent. The rest of the time, it retains any remaining time. It adds more time to the Absorption period whenever the batteries fall below a certain voltage. (See page 23 for more information on how the timer works.)

Offset

This is not a charging stage. The Offset function is designed to use excess battery energy to power the loads, even when an AC source is present. Offset can operate in any stage of charging, but is shown in Figure 3 to display the function when no charging stages or timers are active. This function is described more fully on page 19.

Offset is a constant-voltage mode of operation. The inverter cannot import current to charge the batteries to a target voltage, but it can export any excess current to constantly hold them at this value. The target voltage used when no other stages are active, as shown in Figure 3, is the

Sell Voltage

setting. (Excess current typically comes into the batteries from a PV array, wind turbine, or similar renewable energy source.)

Target point:

Sell Voltage

setting. The default setting is 52.0 Vdc.

The points where the dark blue line intersects the vertical dotted line indicate a change from one step to the next. The

points where they also intersect with a horizontal dotted line indicate that the charger has switched to a new target voltage.

900-0020-01-00 Rev A 21

Operation

This setting is typically lower than the Float voltage setting. Although the batteries are not discharged, they are maintained at a somewhat lower voltage so that the maximum amount of power can be exported. It is recommended that this item be set at the batteries’ natural rest voltage.

In the

Grid Tied

Offset function (see page 19). If the exported power exceeds the load requirements, the excess is sold back to the utility grid, using the inverter’s AC input terminals. The unit will maintain this activity for as long as excess power is available. See page 11 for more notes on the

Regardless of the input mode setting, if no renewable energy is present, the inverter will exit (or skip) this step and enter Silent.

input mode, excess power is sent first to any loads on the inverter’s output, using the

Grid Tied

input mode.

Silent

This is not a charging stage, but a quiescent period between stages. The inverter remains on the AC source, but the charger is inactive. It enters this condition upon completing the Absorption stage and concluding (or skipping) Offset operation.

In Silent, the batteries are not in significant use by the inverter, but they are also not being charged. The battery voltage will naturally decrease when not maintained by another means such as a renewable source.

The term “Silent” is also used in the context of stacking inverters and Power Save levels. See page 28.

Target point:

charger becomes active again. The default set point is 50.0 Vdc.

If the Radian inverter is placed in the

NOTE

proceeds directly to Float stage (see Figure 4 on page 21). It will remain in Float until AC power is disconnected, which usually means that the generator was stopped manually or automatically. See page 9 for more information on this mode.

Re-Float Voltage

setting. When the battery voltage decreases to this point, the

Generator

input mode, the charger skips Silent and

Float Stage

This is the third stage of charging. It is a constant-voltage stage. Current varies as needed to maintain the voltage, but typically drops to a low number. This stage offsets the batteries’ tendency to self-discharge (as well as offsetting the draw of any other DC loads), and maintains them at 100% of capacity.

Target point:

Time limit:

The remaining stages below do not apply in the

NOTE

can occur is a new charging cycle. The criteria for beginning a new cycle are described on page 23.

Float Voltage

Float Time

setting. The default set point is 54.4 Vdc.

setting.

Generator

input mode. The next activity that

Float Timer

This is part of Float stage and is not a separate stage of charging. On the charts on page 21, it is marked as a separate step to note that the timer only begins running upon reaching the Float set point. It does maximum amount whenever the batteries drop to the Re-Float voltage.)

begin running at the beginning of Float stage. (The Float timer is reset to its

not

Repeated Silent

The unit re-enters the Silent stage as it did previously. The unit remains on the AC source, but the charger is inactive.

Target point:

Re-Float Voltage

setting. The default set point is 50.0 Vdc.

22 900-0020-01-00 Rev A

Operation

The unit will continue cycling between Float and Silent for as long as the AC source is present. However, if excess DC power is available and the battery voltage rises above the

Sell Voltage

point, the unit can resume Offset activity as described on page 21.

The unit can only enter Offset when none of the timers are active. If any of the timers have accumulated time while in Silent, the unit will enter the highest stage with accumulated time and proceed from that point.

Voltage

Absorption Set Point

Float Set Point

Sell Set Point

Refloat Set Point Rebulk Point

Charge

Bulk

Absorption

Offset

AC Loss

Absorption

Bul

Offset

Silent

set

Float

Timer

Time

Figure 5 Repeated Charging Cycles

New Charging Cycle

If the AC source is lost or disconnected, the unit will return to inverting mode if enabled. The battery voltage will begin to decrease due to loads or natural loss. When the AC source is restored, the inverter will return to the charging cycle. If the batteries drop below the Rebulk voltage (see below), the inverter will restart the cycle, beginning at Bulk stage. If the batteries do not drop below Rebulk, the charger will not enter the Bulk stage and will return to its previous stage.

New Absorption Stage

When entering the second stage, Absorption, the charger will not necessarily run through its full duration. The timer will count down whatever time remains from the previous cycle, or whatever time it has accumulated since then.

Absorption Timer

The Absorption timer does not reset to its maximum like the Float timer does. Instead, the timer counts upward (gaining time) whenever the battery voltage drops below the Rebulk point. This means that the Absorption period may not always be the same, depending on how much time it has acquired.

The Rebulk voltage is 48.8 Vdc. This is a fixed setting and cannot be changed. For as long as the inverter remains below this voltage, the Absorption timer will gain an equal amount of time. This dictates the duration of the Absorption stage. Note that in Figure 5, the duration of time spent below the Rebulk voltage is the same as the subsequent Absorption period (as shown by the small arrows).

If the battery voltage drops below 48.0 Vdc, the timer increments (counts upward) at double the normal rate. For example, if the batteries spent 8 minutes below this voltage, 16 minutes would be added to the Absorption timer. Similarly, if the battery voltage drops below 47.2 Vdc, the timer increments at quadruple the normal rate.

900-0020-01-00 Rev A 23

Operation

The Absorption timer continues this behavior even if the charger is still on. For example, if the charger is in Float stage and there is a significant battery drain, the charger may not be able to maintain the batteries at the Float voltage. Once the batteries fall below the Rebulk point, the Absorption timer will begin accumulating time. (However, the accumulation will be minor, as this will also cause the charger to re-enter the Bulk stage.)

The timer will stop incrementing when it reaches the duration of the Absorption stage. This means that regardless of the voltage, the timer will always run for the full Absorption period if the batteries dropped below the appropriate voltage for that amount of time. If significant battery drain caused the batteries to drop below the set points for doubling or quadrupling the rate, the charger may run for the full Absorption period even after a lesser amount of time.

The rest of the charging stages will proceed as described on the previous few pages.

Absorb Time

setting. This is the maximum

Equalization

Equalization is a controlled overcharge that is part of regular battery maintenance. Equalization brings the batteries to a much higher voltage than usual and maintains this high voltage for a period of time. This has the result of removing inert compounds from the battery plates, and reducing stratification in the electrolyte.

Equalization follows the same pattern as standard three-stage charging, as shown in the figures on page 21. However, instead of the Absorption voltage and time set points, it is controlled by the

Equalize Voltage

This process must be started manually using the MATE3. The inverter cannot be programmed for automatic battery equalization. This is a safety measure.

Equalization is normally performed only on flooded lead-acid batteries. The schedule for equalization varies with battery use and type, but it is usually performed every few months. If performed correctly, this process can extend battery life by a considerable amount.

and

Equalize Time

settings in the MATE3.

Equalization is not normally performed on nickel-technology batteries or any sort of sealed battery.

CAUTION: Battery Damage



Do not equalize any sealed battery types (VRLA, AGM, Gel, or other) unless

approved by the manufacturer. Some batteries may suffer severe damage from equalization.



Contact the battery manufacturer for recommendations on equalization

voltage, duration, schedule, and/or advisability. Always follow manufacturer recommendations for equalization.

Battery Temperature Compensation

Temperature compensation is a process that corrects for changes in battery performance caused by varying temperature.

When batteries are cooler than room temperature (77°F or 25°C), the electrolyte reaction slows down. This causes the battery to accept charging energy less readily. Delivering the usual amount of energy that would fully recharge a battery at room temperature will undercharge a cool one.

24 900-0020-01-00 Rev A

Operation

Conversely, when batteries are warmer than room temperature, the electrolyte reaction is somewhat hyper-reactive. It takes less energy than usual to charge them. Delivering the full (room-temperature) amount of energy would overcharge them and can be hard on them over time.

The Radian inverter, when equipped with the Remote Temperature Sensor (RTS) will compensate for changes in temperature. The RTS is attached to a single battery near the center of the bank, to achieve a representative temperature. If installed in a multiple-inverter system, only a single RTS is necessary. It must be plugged into the master inverter and will control the charging of all slaves and all charge controllers. (See the Radian Series Inverter/Charger Installation Manual for locating the RTS port.) This process is automatic.

When charging, an inverter system with an RTS will increase or decrease the charge voltage by 5 mV per degree Celsius per battery cell. This setting affects the Absorption, Float, and Equalization set points. The Sell Voltage and Re-Float Voltage set points are not temperature compensated. The Equalization set points are not compensated in OutBack charge controllers.



In a 48 Vdc system (24 cells, 2 volts each), this means 0.12 volts per degree Celsius above or below 25°C. Maximum compensation is ± 2.4 Vdc.

EXAMPLES:



A 48 Vdc system with batteries at 15°C will compensate its charging to 1.2 Vdc



A 48 Vdc system with batteries at 40°C will compensate its charging to 1.8 Vdc

than the set points.

higher

than the set points.

lower

900-0020-01-00 Rev A 25

Operation

Additional Ports

Port 1

MATE

Port

HUB4

MATE

Multiple-Inverter Installations (Stacking)

Multiple inverters in a single system can support larger loads than a single inverter can handle. Installing inverters in this configuration is called “stacking”. Stacking inverters does not refer to physically placing one on top of another. It refers to how they are wired within the system and then programmed to coordinate activity. Stacking allows all units to work together as one system.

The Radian inverter can be stacked in parallel to increase capacity. Up to ten units can be stacked to operate in a single system. Each inverter is programmed to operate at certain times.

Stacking requires an OutBack HUB product, as well as a MATE3 system display (sold separately). A system of four or fewer units may use the HUB4. Systems of up to ten units require the HUB10. All interconnections are made using CAT5 non-crossover cable. (See the Radian SeriesInverter/Charger Installation Manual for more stacking instructions.)

Each inverter needs to be assigned a status — “master” or “slave”. The master is the primary and most heavily used unit. Slave inverters provide assistance when the loads are more than the master can handle alone. Programming involves using the MATE3 to assign a status and stacking value to the inverter on each port. See the MATE3 and HUB manuals for programming instructions.

Figure 6 OutBack HUB4 and MATE3

IMPORTANT:



The master inverter must always be connected to port 1 on the HUB. Connecting

it elsewhere, or connecting a slave to port 1, will result in backfeed or output voltage errors which will shut the system down immediately.



Installing multiple inverters without stacking them (or stacking them incorrectly)

will result in similar errors and shutdown.



Although stacking allows greater capacity, the loads, wiring, and overcurrent

devices must still be sized appropriately. Additional terminations and bus bars may be required. Overloading may cause circuit breakers to open or the inverters to shut down.

26 900-0020-01-00 Rev A

Operation

In parallel stacking, two or more inverters are stacked to create a single, common 120/240 Vac bus.



The master provides the primary output. The slaves are connected to the same output and assist the master.



The slave inverters can be programmed to activate on demand, reducing idle-power consumption. They will

remain off until the loads exceed a certain threshold.



A two-inverter system can continuously power 16 kVA of loads.



Up to ten inverters may be installed in a parallel arrangement.

24 kVA

120/240 Vac

8 kVA

120/240 Vac

8 kVA

120/240 Vac

8 kVA

120/240 Vac

Figure 7 Example of Parallel Stacking Arrangement (Three Inverters)

900-0020-01-00 Rev A 27

Operation

Power Save Levels

Each inverter consumes approximately 30 watts of idle power while it remains on, even if it is not actively inverting or charging. The Power Save function allows the option to put some or all slave inverters into a quiescent state known as Silent mode. This mode minimizes the inverter’s idle consumption. The inverters will come on again when the loads require power. (The term “Silent” is also used in the context of battery charging. See page 22.)



The master inverter remains active unless specifically ordered to turn off. It does not enter Silent mode.



When the majority of the inverter’s wattage is consumed by loads, the master turns on one or more slaves for assistance. When the load drops back to a lesser wattage (as detected by the master), the slaves return to Silent mode.



The order in which slaves turn on (or return to Silent mode) is controlled by programming in the MATE3. The

slaves are given a “rank”, or level number. The lower the number, the sooner a slave will be turned on.

IMPORTANT:

It is highly recommended to use the MATE3 Configuration Wizard to set up this function. It is essential to set the slave Power Save Levels in sequential order. Failure to set them up correctly will cause erratic system behavior. The Configuration Wizard automatically programs the correct priorities. (See the MATE3 Owner’s Manual.)

If it is necessary to set these items manually:

In the MATE3 system display, the items. These are

Master

and

Slave

Inverter Stacking

. Both items have a settable range of values. (See the MATE3

screen contains two

Power Save Level

manual for more information.)



The first item, navigation key. This should be the master inverter. Although the item is still visible when other (slave) ports are available, it should not be programmed when other ports are selected. The range of rank numbers is 0 to 31. The default value is 0. The master is normally left at this value.



The second item, Although the item is still visible when the P01 (master) port is selected, it should not be programmed for P01. The range of rank numbers is 1 to 31. The default value for all ports is 1.



The ranks are prioritized so that lower-numbered ranks turn on sooner and higher ranks turn on later. The lowest-ranked unit will not go silent and will remain on unless ordered otherwise. The lowest-ranked unit is expected to be the master. The priorities are the same across both screens; thus, if P01 (master) is set at 0 and P02 (slave) is set at 1, the slave will turn on later. Since the is easy to ensure that all other units besides the master go silent.



It is highly recommended to rank the slave inverters in order (1, 2, 3, 4, etc.).

automatically makes 4 kW of power instantly available (from the master). If a slave is prioritized higher than the master (by raising the master level to 2 and the slave to 1, for example), that slave will not go silent. This will keep the power save mode from functioning. In general, setting the number higher than 0 will activate an additional 4 kW of power for every increment. If the slave settings have not been programmed correctly, the master may override them and begin turning on unnecessary slaves. This defeats the purpose of the Power Save feature.

It is also recommended that slaves do not share rank numbers. If, for example, multiple slaves were all ranked at 1, they would all come on at the same time. Once they came on, the divided load would cause the master to detect a minimal load on its output, so it would shut off all the slaves, at which point the master would read a high load again. This could quickly escalate into a rapid on/off cycling of inverters and could cause long-term system problems.

Master Power Save Level

Slave Power Save Level

, must only be used when port P01 is selected with the

, must only be used when ports other than P01 are selected.

Master

item is the only one that goes to 0, it

Leaving the master at 0

<PORT>

28 900-0020-01-00 Rev A

Operation

Auxiliary Terminals

The Radian inverter has two sets of terminals which can respond to different criteria and control many functions. The 12V AUX terminals provide a 12 Vdc output that can deliver up to 0.7 Adc to control external loads. The RELAY AUX terminals are “dry” relay contacts with no voltage. Each set of terminals has its own set of programmed criteria. Each has identical options available. (When the options described below refer generically to the “AUX output”, it can mean either set of terminals.)

Each AUX output has three states available: continuous

, continuous On, and

Off

, which allows

Auto

that output to be activated using the automatic auxiliary functions. (All functions on both sets of terminals are defaulted to

.) These functions are based in the Radian inverter and accessed using

Off

the MATE3. The MATE3 and other devices also have programming, such as AGS, that can control the AUX outputs. To avoid conflicts, the output should be turned

when the AGS function is active.

Off

(See page 32.)

For the Radian automatic functions, typical applications include signaling a generator to start, sending a fault alarm signal, or running a small fan to ventilate the batteries. See the Radian Series

Inverter/Charger Installation Manual for more information on hooking up each set of terminals. See the MATE3 Owner’s Manual for instructions on programming each function.

The AUX terminals have a series of set points which are used by various functions. Both sets of terminals have the same options available, but they are programmed independently. Not all set points are used by all functions. Each AUX mode description below will detail the set points that are used for that mode.

 Low DC voltage settings  High DC voltage settings  On delay settings, in increments of 0.1 minutes  Off delay settings, in increments of 0.1 minutes

There are nine functions, each geared toward a different application. The first item on this list may not be the default function displayed in either menu.



Load Shed

the AUX output is activated after a settable delay. The AUX output is used to energize a relay, which is connected to non-vital loads. The AUX output will be deactivated once the battery voltage falls below a low voltage setting for a settable delay period.

Load Shed

voltage drops below 105 Vac for more than three seconds. It will also turn off if the input current exceeds the

Input AC Limit

Parameters include:

 Low and high DC voltage  On and off delay

900-0020-01-00 Rev A 29

can perform load management. When battery voltage rises above a settable high voltage level,

will turn off when the inverter enters a high-temperature condition or when the AC output

setting while the inverter is using an AC source.

Operation



Gen Alert

functionality. (The generator recharges batteries using the inverter’s battery charger.) When the battery voltage falls to a low set point for a settable delay, the AUX output is activated. The AUX output is used to energize a relay. The relay contacts then activate the remote start/stop circuit on the generator. This is illustrated in the Radian Series Inverter/Charger Installation Manual.) The AUX output will be deactivated once the battery voltage rises to a high voltage setting for a settable delay period.

Parameters include:

 Low and high DC voltage  On and off delay

Gen Alert control logic is located in the inverter. It has the advantage of functioning when the system display is removed. However, it may not completely charge the batteries and does not have all the advantages of the Advanced Generator Start (AGS) feature that is found in the system display. For many users, the AGS feature may prove more useful than Gen Alert. Gen Alert, however, could be used as a literal “Generator Alert”, a signal to the user to manually start a generator.

is used as a controller for an AC generator with a remote start feature, although it has limited



enables the AUX output when the inverter shuts down due to an error condition (see page 39). It can

Fault

activate a light or alarm to show that the inverter has failed. With the appropriate devices, it could send an alarm signal through a radio, pager, or telephone dialer.

 This function does not have settable parameters.  This function is not triggered by the Phase Loss error, as that error does not shut down the inverter.

Vent Fan

to ventilate the battery compartment to eliminate gases that result from battery charging. When the voltage falls below this set point for a settable delay period, the AUX output turns off.

Parameters include:

 High DC voltage  Off delay

Cool Fan

trigger a small external fan for additional cooling. See the Warning Troubleshooting table on page 40 for a description of the fan criteria.

 This function does not have settable parameters.

DC Divert

heater, or a fuel cell. When battery voltage rises above a settable high voltage level, the AUX output is activated after a settable delay. The AUX output controls a larger relay, which allows current to flow from the batteries to a dedicated DC load when energized. (This is illustrated in the Radian Series Inverter/Charger Installation Manual.) Diversion is activated by high DC voltage and is usually used to regulate battery charging. The resistor must be sized to dissipate all of the energy from the renewable source if necessary. Diversion will turn off following a delay when a low DC voltage setting is reached.

enables the AUX output in response to a high DC (battery) voltage set point. It can run a small fan

enables the AUX output when the inverter reaches a high internal temperature. It is intended to

enables the AUX output to divert excess renewable energy to a DC load, such as a resistor, a

Parameters include:

 Low and high DC voltage  On and off delay



30 900-0020-01-00 Rev A

enables the AUX function as an alert that the utility grid does not meet IEEE parameters for the

IEEE

grid-interactive function (see page 46). It can activate a light or alarm to show that the grid-interactive function has shut down and that there may be problems with the grid. The AUX output will cycle on and off if IEEE parameters are met and the IEEE timer is counting down.

 This function does not have settable parameters.

Operation



Source Status

alarm to show that the utility grid is present or that a generator has started. Alternately, it could be used to show that the source has disconnected.

 This function does not have settable parameters.



AC Divert

powered by the inverter itself. When battery voltage rises above a settable high voltage level, the AUX output is activated after a settable delay. The AUX output controls a larger relay, which allows current to flow from the batteries to a dedicated AC load when energized. Diversion is activated by high DC voltage following a delay. This function is usually used to regulate battery charging. The AC device is usually wired to the output or load panel and must be left on. It must be sized to dissipate all of the energy from the renewable source if necessary. Diversion will turn off following a delay when a low DC voltage setting is reached.

The AUX output will automatically turn on to run the loads if the inverter accepts an AC source.

Parameters include:

 Low and high DC voltage  On and off delay

During variable conditions, the AUX output is triggered no more than once per minute (if voltage conditions are still met). This prevents rapid nuisance cycling of the AC load in the event of rapidly changing conditions.

AC Divert should not be used as the sole source of battery regulation. If the inverter shuts down or fails, the batteries could suffer severe damage. This function should be supported by an external regulator.

enables the AUX output whenever the inverter accepts an AC source. It can activate a light or

enables the AUX output to divert excess renewable energy to an AC load, usually an AC device

 If the inverter shuts down due to overload, the AUX output will also shut down. If the inverter load

exceeds 30 Aac, the AUX output will turn off to prevent an overload condition.

 If either the FETs or the capacitors (see page 40) become too hot, the AUX will turn off due to

diminished inverter wattage capacity.

Note that even if every function in the menu is set to

, the AUX output may still be triggered by an

Off

external function such as AGS (see page 32).

900-0020-01-00 Rev A 31

Operation

System Display-Based Functions

Advanced Generator Start (AGS)

As noted under the

Gen Alert

the inverter system can use the Advanced Generator Start (AGS) feature, which runs through the entire three-stage charging cycle. It can start according to battery voltage, inverter load, time of day, and other criteria. It has a quiet time feature which restricts the generator from starting at inconvenient times. Additional features are also available.

Because this is an advanced function with capabilities beyond the inverter’s logic for AGS is based in the MATE3 system display, not the inverter. See the MATE3 Owner’s Manual for more information on programming and using the AGS mode.

simply starts and stops the generator based on battery voltage. For more advanced control,

Gen Alert

High Battery Transfer

In High Battery Transfer mode, the system is connected to an AC source such as the utility grid; however, it will use battery power as the first priority. The AC source is locked out until needed.

In this mode, the system runs on battery-supplied power for as long as the batteries can be sustained. It is expected that the system will be supplied by renewable sources such as PV power. When the batteries become depleted, the system reconnects to the AC source to operate the loads.

The batteries may be recharged during this time using the renewable source. When the batteries are recharged to a high enough voltage, the system transfers back to the batteries as the primary source (hence the name High Battery Transfer).

NOTE:

renewable source for charging batteries. Renewable charging is the motivator for returning to battery (and renewable) operation. Use of the inverter’s charger interferes with this priority. It also may not charge effectively.

The inverter’s charger should be off. High Battery Transfer mode is intended to use only the

feature (see page 31), the system is capable of starting a generator.

Gen Alert

, the control

This mode has similar priorities to the Either mode may achieve similar results, but they are not identical. See page 14 for the advantages and disadvantages of each mode.

Because this is a system-wide function and not a function of individual inverters, the control logic for High Battery Transfer is based in the MATE3 system display. See the MATE3 Owner’s Manual for more information.

Mini Grid

input mode contained within the Radian inverter.

Grid Use Time

The inverter system is capable of connecting to, or disconnecting from, the utility grid based on time of day. It can also be programmed to connect at different times on weekdays and on weekends.

Because this is a system-wide function and not a function of individual inverters, the control logic for Grid Use Time is based in the MATE3 system display. See the MATE3 Owner’s Manual for more information.

32 900-0020-01-00 Rev A

Troubleshooting

Basic Troubleshooting

Table 2 is organized in order of common symptoms, with a series of possible causes. Each possible cause also shows possible troubleshooting remedies, including system display checks where appropriate.

In troubleshooting, AC voltages can be measured at this series of test points

usin

a narrow probe

Figure 8 AC Test Points

Table 2 Troubleshooting

Symptom Possible Cause Possible Remedy

No DC Voltage. Use a DC voltmeter to check the voltage directly on the DC

terminals. If not present, the problem is external. If present, the inverter could be damaged. Contact OutBack Technical Support (see inside front cover of this manual).

Jumper J3 missing. See the Installation Manual for the location of J3. Confirm the

jumper is present. If missing, replace the jumper. Or follow the

No AC output (will not invert).

One or more inverters will not invert while others do (in multi-inverter system).

Unit defaulted off (No MATE3 present; initial install; J3 confirmed present).

Inverter set to

Inverter set to mode).

Unit is slave and is in Power Save mode.

. MATE3 system display only: Set to On with the

Off

(Search

Installation Manual instructions to install an external switch.

The Radian inverter is given an initial OFF command in the factory. With DC present, use narrow pliers to remove jumper J3 from its pins. Once removed, install it again. This is the equivalent of “jiggling the switch.”

MATE3 system display only: If constant power is required, set to On with the no action is required.)

MATE3 system display only: Check Power Save levels in the

Inverter Stacking

inverter comes on at the appropriate levels. (If this setting was intentional, then no action is required.)

INVERTER

menu and test with loads. Determine if the

hot key. (If this setting was intentional, then

INVERTER

hot key.

900-0020-01-00 Rev A 33

Troubleshooting

Table 2 Troubleshooting

Symptom Possible Cause Possible Remedy

No AC input. Check the AC voltage on the inverter’s input test points. (See

page 33.) If not present, the problem is external. If present, the inverter could be damaged. Contact OutBack Technical Support (see inside front cover of this manual).

Will not connect to the AC source.

AC input not connected on both L1 and L2.

AC source is not 120/240 Vac split-phase, or the AC source neutral is not connected to the inverter.

Inverter’s L1 output has been connected to its L2 input, or the other way around. This problem is accompanied by shifts in frequency.

AC source does not meet requirements.

AC source meets requirements but is “noisy” or irregular.

Inverter was manually set to disconnect from AC.

Check the AC voltage on the inverter’s input test points. (See page 33.) Both L1 and L2 must have voltage. The inverter will not accept an input from only one leg.

Confirm the nature of the AC source. Check the AC voltage between L1, L2, and neutral on the inverter’s input test points. (See page 33.) L1-neutral and L2-neutral voltages should be 120 Vac. L1-L2 voltage should be 240 Vac. Other voltages or combinations, such as two phases of a three-phase source (208 Vac), or 240 Vac without a neutral, will not be accepted.

Disconnect the wires from the inverter’s AC input terminals or AC output terminals, or both. If the problem immediately disappears, it is an external wiring issue. The inverter’s input and output terminals must remain isolated from each other.

MATE3 system display only: Check the

Drop

AC INPUT

Warning

menu (using the Inverter soft key from the

with the

Use

hot key and the

AC INPUT

(using the reason for disconnection. If the unit never originally connected, check the Home screen). Confirm source voltage and frequency.

MATE3 system display only: The irregular AC power. Select that mode for that input.

MATE3 system display only: Change the AC Input Control setting from was intentional, then no action is required.)

Last AC Disconnect

Discon

Generator

input mode can accept

hot key. (If this setting

selection) for the

screen

Grid use function has disconnected from AC.

High Battery Transfer (HBX) mode has disconnected from AC.

Mini Grid

disconnected from AC.

Offset function has caused the inverter to disconnect from AC. (

Support, Backup, UPS

Mini Grid

Conflicting programming. MATE3 system display only: Check to see if more than one of the

input mode has

, and

input modes.)

MATE3 system display only: If activated prematurely, check both the MATE3’s in the action is required.)

MATE3 system display only: Check the to see if HBX mode is in use. If activated prematurely, check the settings of HBX mode. (If this setting was intentional, then no action is required.)

MATE3 system display only: Check the menu to see if check the settings of intentional, then no action is required.)

The Offset function sends excess renewable energy to the loads to augment the AC source. If more renewable energy is produced than the loads can consume, the AC source is judged unnecessary and the inverter disconnects from it. (See page 19.)

following are enabled: conflicting priorities and only one can be used at a time.

Grid Use Time

menu. (If this setting was intentional, then no

System

Mini Grid

settings and the MATE3 clock settings

AC INPUT

Inverter

mode is in use. If activated prematurely,

Mini Grid

mode. (If this setting was

Mini Grid

, HBX, Grid Use Time. These have

hot key screen

part of the

Settings

34 900-0020-01-00 Rev A

Table 2 Troubleshooting

Symptom Possible Cause Possible Remedy

Troubleshooting

Low charge rate.

Will not charge.

Unusual voltage on hot or neutral output line.

Charge complete or nearly complete.

MATE3’s DC meter reads significantly higher than actual battery voltage.

High output loads. If total loads and charge exceed the AC input setting, charge rate decreases to give priority to the loads.

Generator

No AC input. See “Will not connect to AC” category.

Charger set to

System neutral and ground may not be bonded.

input mode in use.

. MATE3 system display only: Check the

Off

Check the DC voltage and charging stage using the MATE3, if present. Confirm with DC voltmeter.

Check the DC voltage on the inverter’s DC terminals. If different from the MATE3 reading, the inverter could be damaged. Otherwise, check the DC voltage on batteries with a voltmeter. If different from the reading on the inverter, this could be a DC connection problem.

Turn off some of the output loads and test the charge rate again.

Radian charge rate is limited in this mode (see page 9.)

CHARGER

the intentional, then no action is required.)

Test L1 OUT, L2 OUT, and NEU test points with AC voltmeter. (See page 33.) These measurements should give full voltage. Test NEU and ground connections. This measurement should read zero volts. Any other result means neutral and ground are not bonded correctly. If this is the case, usually the hot line reads 60-75 Vac and the neutral reads 45-60 Vac, with respect to ground.

hot key and set to On or

Charger Mode

. (If this setting was

Auto

screen with

Unusual and different voltages on AC hot input lines.

Will not sell power to the utility grid.

Input neutral is not connected correctly. The inverter also may not connect to the AC source.

Grid-tied function has been manually disabled.

Grid Tied

the appropriate input.

AC source does not meet requirements.

Inverter priority.

High output loads will consume power before it is returned to the utility grid.

mode not in use on

Test L1 input and NEU connections with AC voltmeter. Test L2 input and NEU connections with AC voltmeter. (This can be on Grid or Gen input, depending where the symptoms appear.) Test L1 to L2 input. From hot to neutral should be approximately

Vac. L1 to L2 should be approximately 240 Vac. If the two

120 legs are different voltages but still add up to 240 Vac, the neutral is not connected to the inverter.

MATE3 system display only: Check the the

Grid-Tie Sell

MATE3 system display only: Check the menu to see if selected for the correct Radian input terminals.

Verify grid voltage and frequency. Determine if they are within the inverter’s approved limits. If not, the inverter is behaving correctly. Contact the utility company if necessary.

MATE3 system display only: The program selections for limits are

IEEE

user

MATE3 system display only: Check Home screen’s soft keys. The inverter may be behaving correctly.

Turn off some output loads and observe the sell function.

menu. Confirm it is set to Y.

Grid Tied

. They are found in the inverter’s

mode is in use. Confirm that it has been

Grid-Tie Enable

Inverter

Sell Status

Grid-Tie Sell

screen using the

setting in

part of the

Settings

menu.

900-0020-01-00 Rev A 35

Troubleshooting

Table 2 Troubleshooting

Symptom Possible Cause Possible Remedy

Reduced power sold to the utility grid.

Loads drop out or crash during transfer.

AC source voltage is driven high when the inverter sells large amounts of power.

Erratic AC source voltage. Check AC voltage on the inverter’s input test points. (See page

Inverter set to mode).

Loads sensitive to inverter’s transfer time. use on the appropriate input.

(Search

mode not in

UPS

When the inverter senses a rise in grid voltage while selling, it reduces the sell current, to avoid forcing the voltage to unacceptable levels. Check AC input voltage while selling. The inverter may be behaving correctly.

33.) If not consistent, the problem is external.

MATE3 system display only: AC source voltage may have dipped or hovered at a low enough point to crash a sensitive load before the inverter could take over. This can happen if the inverter’s

AC Input Voltage Limits

turned down to accommodate a problematic AC source. To make the inverter respond sooner, raise the lower limit setting in the appropriate menu. (If this setting was intentional, then no action is required.)

The unit will take a moment to come out of Search mode after transferring.

MATE3 system display only: If constant power is required, set to

with the

then no action is required.)

MATE3 system display only: Most of the inverter’s input modes feature an approximately 12 ms transfer time. Certain loads (such as highly sensitive computers) may not respond well. The input mode has a transfer time of less than 4 ms. Select this mode for the appropriate input. (See page 12.)

INVERTER

Gen AC Input Voltage Limits

hot key. (If this setting was intentional,

were

UPS

Grid

Unit reads AC input, even though no source is present.

Inverter clicks repeatedly. AC output voltage rises or drops to unusual levels with every click.

Loads too large. The unit can transfer more power than it can invert. If loads are

oversized, the unit will falter or crash when switching to batteries. Reduce the size of the loads.

Undersized battery cables. Battery cables smaller than recommended will cause a significant

voltage drop when switching to batteries, acting like either an overload or a low-battery condition. Size all cables correctly.

Internal transfer relay may be damaged.

Inverter’s output has been connected to its input. Voltage shifts are the result of trying to match its own voltage.

Low AC input voltage. Can be caused by weak AC source, or by faulty input connection.

A generator is connected to the input terminals while the unit is in the Grid Tied input mode.

Disconnect AC input wires and turn inverter on. Test the AC input and neutral test points with an AC voltmeter. (See page 33.) If voltage appears there, the transfer relay may be jammed. Contact OutBack Technical Support (see inside front cover of this manual). This problem is not common. If this occurs, it will likely occur on only the Grid or Gen input — not both.

Disconnect the wires from the inverter’s AC input or AC output terminals, or both. If the problem immediately disappears, it is an external wiring issue. The inverter’s AC HOT IN and AC HOT OUT must remain isolated from each other.

Test AC hot and neutral input test points with an AC voltmeter. (See page 33.) If low or fluctuating, this is an external problem.

The inverter is not intended to sell power to a generator. The selling activity will drive the generator voltage up to the disconnection point. It will then reconnect to the generator and try again. Change input modes, or move the generator to an input with a different mode selected.

36 900-0020-01-00 Rev A

Table 2 Troubleshooting

Symptom Possible Cause Possible Remedy

Troubleshooting

Inverter hums loudly. System display may show messages for high battery voltage, low battery voltage, or backfeed error.

Generator, external fan, etc. fails to start when triggered by AUX output.

Inverter output is being fed with an external AC source that is out of phase.

Inverter has been incorrectly stacked with another unit on the same output. All units come defaulted as master.

AUX output is not connected. Test the generator or device to confirm functionality. Test the

Wrong AUX terminals have been programmed.

Wrong AUX terminals are in use. If generator or external device requires 12 Vdc, confirm the 12V

Disconnect AC output wires. Turn the inverter off and then on. If the problem clears, reconnect the AC output wires. If the problem recurs when reconnected, an external AC source is connected to the output.

Check HUB ports and make certain the master inverter is plugged into port 1.

MATE3 system display only: Check stacking settings in the

Stacking

appropriate AUX terminals with a DVM. (If the RELAY AUX terminals are in use, test for continuity. If the 12V AUX terminals are in use, test for 12 Vdc.) If the proper results are present when the menu indicates the function is On (and the device still does not work), then there is an external connection problem. If the proper results are not present with the function On , the AUX circuit may be damaged. Contact OutBack Technical Support (see inside front cover of this manual).

MATE3 system display only: Confirm that the AUX menu that was programmed matches the terminals that are in use. The

Output Relay

AUX terminals have been connected. The RELAY AUX terminals do not provide voltage.

menu. Only one master is allowed per system.

menu programs the 12V AUX terminals. The

menu programs the RELAY AUX terminals.

Inverter

Auxiliary

Automatic Generator Start fails to trigger when conditions are met (or starts when conditions are not met).

MATE3 system display only: AGS function does not work if a valid input is present.

MATE3 system display is not present.

Check both inputs for a second AC source (utility grid). If the inverter detects an acceptable AC source, it will not allow AGS. This is true even if it is internally disconnected from the source (due to HBX mode,

AGS programming is located in MATE3 and cannot function if it is removed.

Mini Grid

mode, or similar programming).

900-0020-01-00 Rev A 37

Troubleshooting

NOTES:

38 900-0020-01-00 Rev A

Troubleshooting

Error Messages

An Error is caused by a critical fault. In most cases when this occurs, the unit will shut down. The MATE3 system display will show an Event and a specific Error message. This screen is viewed using the MATE3 Home screen’s soft keys. (See the MATE3 manual for more instructions.) One or more messages will display Y (yes). If a message says N (no), it is not the cause of the error.

NOTE:

The Radian series has no external indicators and requires a system display to identify an Error.

It is possible to clear an error by resetting the inverter. The inverter must be turned off, and then on, to reset it. Other possible steps are shown below (although it is still necessary to reset the inverter).

Table 3 Error Troubleshooting

Message Causes Possible Remedy

Low Output Voltage

AC Output Shorted

AC Output Backfeed

Stacking Error

Low Battery V

Inverter’s AC regulation cannot be maintained under high load conditions.

Inverter exceeded its maximum surge current due to severe overload.

Usually indicates another AC power source (out of phase with the inverter) was connected to the unit’s AC output.

Programming problem among stacked units. (Often occurs if there is no master.)

Can also occur when occurs.

DC voltage is below low battery cut-out set point, usually due to battery discharge.

This error can be triggered by other causes. It can appear along with

Output Shorted

AC Output Backfeed

Low Output Voltage, AC

, or

AC Output Backfeed

errors.

Check loads and measure current draw. Remove loads as necessary.

Check the loads and wiring. This issue is usually the result of a wiring problem (a short), as opposed to a poorly-sized load.

Disconnect the AC OUT wires from the inverter. Check the wires (not the inverter) with an AC voltmeter. If an AC source is present, shut it off.

Check stacking programming and designation of master. (See page 25.)

Check for output backfeed from an external source. Donnect output if necessary.

If this error accompanies other errors, treat those conditions as appropriate.

If it occurs by itself: Recharge the batteries. The error will clear automatically if an external AC source is connected and the inverter’s charger comes on.

High Battery V

Over Temperature

Phase Loss

900-0020-01-00 Rev A 39

DC voltage exceeded acceptable level (specified on page 15).

Inverter has exceeded its maximum allowed operating temperature.

A slave was ordered to transfer to AC by the master, but no AC is present. The unit continues inverting. This is the only “Error” that is not accompanied by a shutdown.

Check the charging source. This problem is usually the result of external charging. This error will clear automatically if conditions are removed.

Allow the inverter to remain off for a short time to reduce the temperature, or add external cooling.

Check the AC voltage on the inverter input terminals. If AC voltage is not present, problem is external. If AC voltage is present, the unit may be damaged. Contact OutBack Technical Support (see inside front cover of this manual).

Troubleshooting

Warning Messages

A Warning message is caused by a non-critical fault. When this occurs, the unit will not shut down, but the MATE3 system display will show an Event and a specific Warning message. This screen is viewed using the MATE3 Home screen’s soft keys. (See the MATE3 manual for more instructions.) One or more messages will display Y (yes). If a message says N (no), it is not the cause of the warning.

NOTE:

The Radian series has no external indicators and requires the MATE3 system display to identify

a Warning.

Some warnings can become errors if left unattended. Frequency and voltage warnings are meant to warn of a problematic AC source. Often the inverter will disconnect from the source. This will occur if the condition lasts longer than the inverter’s transfer delay settings. If the inverter disconnects, the warning will display as long as the source is present, accompanied by a Disconnect message. (See next page.)

Warning screens can only display warnings; they cannot clear them. The way to correct the fault may be obvious from the message.

Table 4 Warning Troubleshooting

Message Definition Possible Remedy

AC Freq Too High

The AC source is above the upper acceptable frequency limit (66 Hz) and prevents connection.

Check the AC source. If it is a generator, reduce its speed.

AC Freq Too Low

Voltage Too High

Voltage Too Low

Input Amps > Max

Temp Sensor Bad

Comm Fault

The AC source is below the lower acceptable frequency limit (54 Hz) and prevents connection.

The AC source is above the upper acceptable voltage limit on either L1 or L2 (132 Vac default setting) and prevents connection.

The AC source is below the lower acceptable voltage limit on either L1 or L2 (108 Vac default setting) and prevents connection.

AC loads are drawing more current from the AC source than allowed by the input setting.

An internal inverter temperature sensor may be malfunctioning. One of the three internal sensor meters may give an unusual reading.

The inverter has suffered an internal communication failure.

Check the AC source. If it is a generator, increase its speed.

Check the AC source. The inverter’s acceptance range is adjustable.

Adjusting the range may accommodate a

NOTE:

problematic AC source, but it will not fix it.

Check the AC source. Check the AC wiring. The inverter’s acceptance range is adjustable.

Adjusting the range may accommodate a

NOTE:

problematic AC source, but it will not fix it.

Check the loads. Oversized loads can open circuit breakers. If they exceed the inverter’s transfer relay size, the relay can be damaged.

This issue is usually the result of a poorly-sized load, as opposed to a wiring problem.

In the MATE3, the three readings are labeled

Transformer, Output FETs,

These values are given in degrees Celsius. See next page.

Unit still functions, but may require repair. Contact OutBack Technical Support (see inside front cover of this manual).

and

Capacitors

40 900-0020-01-00 Rev A

Troubleshooting

Table 4 Warning Troubleshooting

Message Definition Possible Remedy

Fan Failure

Transformer

(in

menu)

Temps

Output FETs

(in

Capacitors

(in

Temps

menu)

The inverter’s internal cooling fan is not operating properly. Lack of cooling may result in derated inverter output wattage.

isplays the ambient temperature around the

inverter’s transformer.

Displays the temperature of the FETs (Field Effect Transistors) and heat sink.

Displays the temperature of the inverter’s ripple capacitors.

Turn the battery disconnect off, and then on, to determine if the fan self-tests. After this test, contact OutBack Technical Support for the next step. (The next step will depend on the results of the test.)

The system can continue to operate if the

NOTE:

inverter can be run at reasonable levels. External cooling may also be applied.

In the MATE3, these values are given in degrees Celsius.

If any reading does not seem to reflect the inverter’s temperature or conditions, contact OutBack Technical Support (see inside front cover of this manual).

900-0020-01-00 Rev A 41

Troubleshooting

Disconnect Messages

Disconnect messages explain the reason that the inverter rejected an AC source. The unit returns to inverting mode if turned on. This screen is viewed using the

AC INPUT

the MATE3 manual for more instructions.) One or more messages will display Y (yes). If a message says N (no), it is not the cause of the disconnect. The MATE3 system display may generate a concurrent Event and Warning message following the disconnect. (See previous page.) If the AC source is removed, the Warning will be blank, but the cause of the last disconnect will remain.

Disconnect messages only display the reason for the disconnection; they cannot correct it. It is usually the result of external conditions, not an inverter fault. If the condition is corrected, the inverter will reconnect. A few settings can be changed to accommodate problems with the AC source.

The reasons shown in the Sell Status menu for ceasing to sell power (see next page) are not the same as disconnect messages, although they may be caused by the same circumstance. A grid-interactive unit can stop selling and still remain connected to the utility grid.

Table 5 Disconnect Troubleshooting

Message Definition Possible Remedy

hot key on the MATE3. (See

Frequency Too High

Frequency Too Low

Voltage > Maximum

Voltage < Minimum

Backfeed

Phase Lock

The AC source has exceeded 66 Hz.

The AC source has dropped below 54 Hz.

The AC source has exceeded 140 Vac (default value) on either L1 or L2.

The AC source has dropped below 108 Vac (default value) on either L1 or L2.

Usually indicates another AC power source (out of phase with the inverter) was connected to the unit’s AC output.

Can also occur if an out-of-phase AC source is connected to the inverter’s AC input.

The unit cannot remain in phase with an erratic AC source.

This is not an “Error” as

NOTE:

defined on page 39 and is not accompanied by a shutdown.

Check AC source. If it is a generator, reduce speed.

Check AC source. If it is a generator, increase speed.

Check AC source. The inverter’s acceptance range is adjustable.

Adjusting the range may accommodate a

NOTE:

problematic AC source, but it will not fix it.

Check AC source. The inverter’s acceptance range is adjustable.

Adjusting the range may accommodate a

NOTE:

problematic AC source, but it will not fix it.

Disconnect the AC OUT wires. Check the wires (not the inverter) with an AC voltmeter. If an AC source is present, shut it off. (This is more often accompanied by an

Check input source and wiring. This can be caused by a source with phase problems. It can also be caused by transferring from one AC source to another before the inverter can synchronize itself.

Check AC source. This can be caused by a generator with a poorly regulated output. Some generators behave this way when running out of fuel. If necessary, set the Radian inverter to the

Generator

input mode. (See page 9.)

AC Output Backfeed

error.)

Island Detect

The unit detects something other than normal grid conditions. This is usually the result of an open AC input circuit.

Check all input circuit breakers for an open circuit. This may (rarely) happen with a generator. If necessary, set the inverter to the mode. (See page 9.)

Generator

input

42 900-0020-01-00 Rev A

Troubleshooting

Sell Status

Sell Status messages describe conditions relating to the inverter’s grid-interactive mode. This screen is viewed using the MATE3 Home screen’s soft keys. (See the MATE3 manual for more instructions.) One or more messages will display Y (yes). If a message says N (no), it is not the cause of the disconnect.

If the inverter has stopped selling or charging unexpectedly, this screen may identify the reason. More often these messages are used by a normally functioning inverter to identify external conditions that are preventing selling or charging. (If nothing has stopped, the messages will indicate that as well.)

The acceptable limits for AC source voltage and frequency are displayed on page 47. If the AC source exceeds these limits, the inverter will stop selling and display the appropriate code. After the source returns to the acceptable range, the screen will begin a 5-minute timer. When the timer expires, the inverter will begin selling power again.

If the AC source is unstable, it may become unacceptable before the timer expires. This may cause the timer to continually reset. It is possible for brief fluctuations to occur that are too fast to be seen on a DVM. If this happens, the appropriate message will still appear on the system display for a short time to help troubleshoot the problem.

Additionally, undersized wires or bad connections can result in local voltage problems. If a

Too Low

Voltage Too High

message is accompanied by voltage changes that do not appear at the

main utility connection, check the wiring.

Table 6 Sell Status Messages

Sell Status Definition

Selling Disabled

Qualifying Grid

Frequency Too Low

Frequency Too High

Voltage Too Low

Voltage Too High

The

Grid-Tie Enable

All utility grid conditions are acceptable. The inverter is running a 5-minute test during which it confirms the grid quality. The timer is shown on the screen. At the end of that time, the inverter may be ready to sell.

The utility grid’s AC frequency is below the acceptable range for selling. (See page 47.)

The utility grid’s AC frequency is above the acceptable range for selling. (See page 47.)

The utility grid’s AC voltage is below the acceptable range for selling. (See page 47.)

The utility grid’s AC voltage is above the acceptable range for selling. (See page 47.)

command has been set to N (no).

Voltage

Battery < Target

The battery voltage is below the target voltage for that stage (Float, Selling, etc.). No excess energy is available to sell.

900-0020-01-00 Rev A 43

Troubleshooting

NOTES:

44 900-0020-01-00 Rev A

Specifications

Specifications for Model GS8048

Table 7 Electrical Specifications for Model GS8048

Specification Value

Nominal DC Input Voltage Continuous Output Power at 25°C AC Output Voltage AC Output Frequency Continuous AC Output Current at 25°C Waveform CEC Weighted Efficiency Total Harmonic Distortion (maximum) Harmonic Distortion (maximum single voltage) Output Voltage Regulation ± 2 % Maximum Output Current (1 ms peak) Maximum Output Current (100 ms RMS) Overload Capability (100 ms surge) Overload Capability (5 second) Overload Capability (30 minute) Idle Consumption - Invert mode, no load Idle Consumption - Search Mode AC Input Voltage Range (Adjustable) AC Input Frequency Range AC Input Current (Maximum) Grid-Interactive Voltage Range (Default) Grid-Interactive Frequency Range (Default) Battery Charger Maximum AC Input Battery Charger Maximum DC Output DC Input Voltage Range DC Input Current at Rated Power Maximum DC Input Current on Surge Auxiliary Output Auxiliary Relay

48 Vdc 8000 VA 120/240 Vac 60 hz

33.3 Aac at 240 Vac True Sinewave 90% < 5% < 2%

100 Aac at 240 Vac, 200 Aac at 120 Vac

70.7 Aac at 240 Vac

16.97 kVA 12 kVA 9 kVA 30 watts

9.9 watts (L1 or L2) 108 – 132 Vac 54 – 66 Hz 55 Aac at 240 Vac (L1 or L2) 108 – 132 Vac (L1 or L2) 59.3 – 60.5 Hz 30 Aac at 240 Vac 115 Adc 40 – 64 Vdc 200 Adc

424.2 Adc

0.7 Adc at 12 Vdc 10 A at 250 Vac or 30 Vdc

Table 8 Mechanical Specifications for Model GS8048

Specification Value

Inverter Dimensions (H x W x L) Shipping Dimensions (H x W x L) Inverter Weight Shipping Weight Accessory Ports Non-volatile Memory Neutral-Ground Bond Switching Chassis Type

900-0020-01-00 Rev A 45

16” x 28” x 8.75” (40.6 cm x 71.1 cm x 22.2 cm) 21” x 34.5” x 14.5” (53.3 cm x 87.6 cm x 36.8 cm) 125 lbs (56.8 kg) 140 lbs (64 kg) RJ11 (batt temp) and RJ45 (remote) Yes No Vented

Specifications

Environmental Specifications

Table 9 Environmental Specifications for All Models

Specification Value

Rated Temperature Range (meets all specifications) 32°F to 122°F

(0°C to 50°C)

Operational Temperature Range (functions, but does not necessarily meet all specifications) –40°F to 140°F

(–40°C to 60°C)

Storage Temperature Range –40°F to 140°F

(–40°C to 60°C)

Regulatory Specifications

 Canadian Electrical Code, Part I (CSA C22.2 No. 107.1-01 (R2006)  UL 1741, 2

Power Systems

Edition, Revised January 28, 2010, Static Inverter and Charge Controllers for Use in Photovoltaic

Inverters intended for grid-interactive use in the United States and Canada must comply with the established standards of UL 1741 and IEEE 1547 and 1547.1. These standards provide regulation for acceptable output voltage ranges, acceptable output frequency, total harmonic distortion (THD) and anti-islanding performance when the inverter is exporting power to a utility source.

The OutBack grid-interactive models are tested using the procedures listed in IEEE 1547.1 to the standards listed in both UL 1741 and IEEE 1547. The following specifications have been validated through compliance testing and refer to exporting power to a simulated utility source of less than 1% voltage total harmonic distortion (THD).



The output of the Radian series exceeds the minimum power factor of 0.85 with a typical power factor of 0.96 or better.



The individual harmonics do not exceed the limits specified in Table 3 of IEEE 1547 Section 4.3.3. The THD of the root mean square (RMS) current is less than 5%.



The Radian inverters cease to export power to the simulated utility source under islanding conditions specified in IEEE 1547 Section 4.4.1.



The Radian inverters also cease to export power to the simulated utility source after the output voltage or frequency of the simulated utility source are adjusted to each of the conditions specified in IEEE 1547 Section

4.2.3 Table 1 and Section 4.2.4 Table 2 within the times specified in those tables. All Radian inverters manufactured for use in the United States and Canada are tested to comply with the table below.

Table 10 Radian Series Interconnection Response Times to

Abnormal Voltages or Frequencies (per leg)

Voltage Range

(AC Volts)

V < 60.0 60.0 0.16 9.6

60.0 < V < 105.6 60.0 2.0 120.0

105.6 < V < 132.0 60.0 no cessation no cessation

132.0 < V < 144.0 60.0 1.0 60.0 V > 144.0 60.0 0.16 9.6

120.0 < 59.3 0.16 9.6

120.0 > 60.5 0.16 9.6

46 900-0020-01-00 Rev A

Frequency

(Hz)

Seconds

Allowed

Cycles

Allowed

Specifications

The acceptance ranges are selected using the system display. In the MATE3, the options are and

user.

IEEE

 

The

option allows a range of 108 – 132 Vac at 59.3 – 60.5 Hz

IEEE

option does not have a fixed voltage setting. It follows the upper and lower limit settings in the

user

Grid AC Input Mode and Limits menu. The default is a range of 108 – 132 Vac.

Reconnection delay is 6 seconds. Sell delay is 5 minutes. These settings are not adjustable.

Firmware Revision

This manual applies to Radian series inverter/chargers with a firmware version of 001.000.xxx or higher.

Default Settings and Ranges

Table 11 GS8048 Inverter Settings

Field Item Default Minimum Maximum

INVERTER

CHARGER

AC Input

AC Input and Current Limit

Grid AC Input Mode and Limits

Gen AC Input Mode and Limits

AC Output

Low Battery

Battery Charger

Battery Equalize

Hot Key Inverter Mode

Hot Key Charger Control

Hot Key AC Input Mode

Sensitivity (see page 16 for increments)

Pulse Length

Pulse Spacing

Input Priority Grid Grid or Gen

Grid Input AC Limit

Gen Input AC Limit Charger AC Limit

Input Mode Grid Tied

Voltage Limit Lower

(Voltage Limit)Upper

Transfer Delay

Connect Delay

Input Mode Generator

Voltage Limit Lower

(Voltage Limit) Upper

Transfer Delay

Connect Delay

Output Voltage

Cut-Out Voltage

Cut-In Voltage

Absorb Voltage

(Absorb) Time

Float Voltage

(Float) Time

Re-Float Voltage

Equalize Voltage (Equalize) Time

Off On, Off, or Search

On On or Off

Use Drop or Use

10 0 250

8 AC cycles 4 AC cycles 20 AC cycles

60 AC cycles 4 AC cycles 120 AC cycles

50 Aac 5 Aac 55 Aac 50 Aac 5 Aac 55 Aac 30 Aac 0 Aac 30 Aac

Generator, Support, Grid Tied, UPS, Backup,

Mini Grid

108 Vac 70 Vac 110 Vac

132 Vac 125 Vac 140 Vac

6 AC cycles 0 AC cycles 240 AC cycles

0.2 minutes 0.2 minutes 15 minutes

Generator, Support, Grid Tied, UPS, Backup,

Mini Grid

108 Vac 70 Vac 110 Vac

140 Vac 125 Vac 140 Vac

6 AC cycles 0 AC cycles 240 AC cycles

0.5 minutes 0.2 minutes 15 minutes

240 Vac 220 Vac 260 Vac

42 Vdc 36 Vdc 48 Vdc 50 Vdc 40 Vdc 56 Vdc

57.6 Vdc 52 Vdc 64 Vdc

1.0 hours 0.0 hours 24.0 hours

54.4 Vdc 48 Vdc 60 Vdc

1.0 hours 0.0 hours 24.0 hours

50 Vdc 48 Vdc 52 Vdc

58.4 Vdc 56 Vdc 68 Vdc

1.0 hours 0.0 hours 24.0 hours

900-0020-01-00 Rev A 47

Specifications

Table 11 GS8048 Inverter Settings

Field Item Default Minimum Maximum

Aux Control Off Off, Auto or On

Load Shed, Gen Alert, Fault, Vent Fan, Cool Fan,

DC Divert, IEEE, Source Status, AC Divert

Load Shed, Gen Alert, Fault, Vent Fan, Cool Fan,

DC Divert, IEEE, Source Status, AC Divert

Auxiliary Output

Auxiliary Relay

Inverter Stacking

Power Save

(in Stacking Menu)

Grid-Tie Sell

Calibrate

Aux Mode Vent Fan

(Load Shed) ON: Batt > (Load Shed ON) Delay (Load Shed) OFF: Batt < (Load Shed OFF) Delay (Gen Alert) ON: Batt < (Gen Alert ON) Delay (Gen Alert) OFF: Batt > (Gen Alert OFF) Delay (Vent Fan) ON: Batt > (Vent Fan) Off Delay (DC Divert) ON: Batt > (DC Divert ON) Delay (DC Divert) OFF: Batt < (DC Divert OFF) Delay (AC Divert) ON: Batt > (AC Divert ON) Delay (AC Divert) OFF: Batt < (AC Divert OFF) Delay

Aux Control Off Off, Auto or On

Aux Mode Gen Alert

Stack Mode Master Master, Slave

Master Power Save Level

Slave Power Save Level

Grid-Tie Enable Y Y or N

Sell Voltage Grid-Tie Window IEEE IEEE or user

Input Voltage

Output Voltage

Battery Voltage

56 Vdc 40 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

18 Secs 6 Secs 1500 Secs

44 Vdc 40 Vdc 56 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

18 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

44 Vdc 40 Vdc 56 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

44 Vdc 40 vdc 56 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 40 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

18 Secs 6 Secs 1500 Secs

44 Vdc 40 Vdc 56 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

18 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

44 Vdc 40 Vdc 56 Vdc

30 Secs 6 Secs 1500 Secs

56 Vdc 48 Vdc 72 Vdc

30 Secs 6 Secs 1500 Secs

44 Vdc 40 vdc 56 Vdc

30 Secs 6 Secs 1500 Secs

0 0 31 1 1 31

52 Vdc 40 Vdc 60 Vdc

0 -7 7 0 -7 7 0 -0.8 0.8

48 900-0020-01-00 Rev A

Product Registration

The purchase of an OutBack Power Technologies product is an important investment. Registering the products will help us maintain the standard of excellence you expect from us in terms of performance, quality and reliability.

Please take a moment to register and provide us with some important information.

Registration can be done as follows:



Go to the following web site.

100H101Hhttp://www.outbackpower.com/resources/warranty/ or



Fill out the information on this form (pages 49 and 50) and return a paper copy using a postal service to the following address:

OutBack Power Technologies

Attn: Warranty Registration

5917 – 195

Arlington, WA 98223 USA

Be sure to keep a copy for your records.

SYSTEM OWNER

Name

Address

City, State,

Postal or Zip Code

Country

Telephone Number

E-mail

SYSTEM PURCHASE

Street N.E., #7

Product Model Number

Product Serial Number

Sold by

Purchase Date

900-0020-01-00 Rev A 49

Product Registration

INSTALLATION INFORMATION

System Install/Commission Date

System Array Size

System Array Nominal Voltage

Type of PV Modules

System Battery Bank Size (Amp-Hours)

Brand and Model of Batteries

Does this system include an auxiliary AC generator?

If yes, please specify brand and model of generator

INSTALLER INFORMATION

Contractor Number

Installer Name

Installer Address

Installer City, State, Postal or Zip Code, Country

Installer Telephone/E-mail

Please check ALL factors affecting purchase decision:

 Grid-Interactive Capability  Product Reputation  Back-up Capability  Reputation of OutBack Power Technologies  Value  Looks  Other

Extended Warranty

For areas where it is a requirement of local programs, OutBack Power Technologies offers a five-year (5) extension to the standard five-year (5) Limited Warranty for the Radian Series Inverter/Charger. To request a 5-year limited warranty extension for a total effective warranty coverage period of ten (10) years, please include a payment in the amount of Technologies, Inc. along with the Product Registration. Please submit within 90 days of the first retail sale of the inverter(s). Please indicate the quantity of each product.

Be sure to keep a copy for your records.

50 900-0020-01-00 Rev A

USD per inverter, payable to OutBack Power

$899

Warranty

5-Year Limited Warranty for Radian Products

OutBack Power Technologies, Inc. (“OutBack”) provides a five-year (5) limited warranty (“Warranty”) against defects in materials and workmanship for its Radian Series products (“Product”) if installed in fixed location applications.

The term of this Warranty begins on the Product(s) initial purchase date, or the date of receipt of the Product(s) by the end user, whichever is later. This must be indicated on the invoice, bill of sale, and/or warranty registration card submitted to OutBack. This Warranty applies to the original OutBack Product purchaser, and is transferable only if the Product remains installed in the original use location. The warranty does not apply to any Product or Product part that has been modified or damaged by the following:

 Installation or Removal;  Alteration or Disassembly;  Normal Wear and Tear;  Accident or Abuse;  Corrosion;  Lightning;  Repair or service provided by an unauthorized repair facility;  Operation or installation contrary to manufacturer product instructions;  Fire, Floods or Acts of God;  Shipping or Transportation;  Incidental or consequential damage caused by other components of the power system;  Any product whose serial number has been altered, defaced or removed; 

Any other event not foreseeable by OutBack.

OutBack’s liability for any defective Product, or any Product part, shall be limited to the repair or replacement of the Product, at OutBack’s discretion. OutBack does not warrant or guarantee workmanship performed by any person or firm installing its Products. This Warranty does not cover the costs of installation, removal, shipping (except as described below), or reinstallation of Products or parts of Products.

THIS LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY APPLICABLE TO OUTBACK PRODUCTS. OUTBACK EXPRESSLY DISCLAIMS ANY OTHER EXPRESS OR IMPLIED WARRANTIES OF ITS PRODUCTS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. OUTBACK ALSO EXPRESSLY LIMITS ITS LIABILITY IN THE EVENT OF A PRODUCT DEFECT TO REPAIR OR REPLACEMENT IN ACCORDANCE WITH THE TERMS OF THIS LIMITED WARRANTY AND EXCLUDES ALL LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION ANY LIABILITY FOR PRODUCTS NOT BEING AVAILABLE FOR USE OR LOST REVENUES OR PROFITS, EVEN IF IT IS MADE AWARE OF SUCH POTENTIAL DAMAGES. IF YOU ARE A CONSUMER THAT PURCHASED THIS PRODUCT IN A MEMBER STATE OF THE EUROPEAN UNION, YOU MAY HAVE ADDITIONAL STATUTORY RIGHTS UNDER DIRECTIVE 1999/44/EC. THESE RIGHTS MAY VARY FROM EU MEMBER STATE TO EU MEMBER STATE. SOME STATES (OR JURISDICTIONS) MAY NOT ALLOW THE EXCLUSION OR LIMITATION OF WARRANTIES OR DAMAGES, SO THE ABOVE EXCLUSIONS OR LIMITATIONS MAY NOT APPLY TO YOU.

900-0020-01-00 Rev A 51

Warranty

How to Arrange for Warranty Service

During the warranty period beginning on the invoice date, OutBack Power Technologies will repair or replace products covered under this limited warranty that are returned to OutBack Power Technologies’ facility or to an OutBack Power Technologies authorized repair facility, or that are repaired on site by an OutBack Power Technologies authorized repair person.

IMPORTANT:

For full Warranty description, see previous page.

Contacting OutBack

To request warranty service, contact OutBack Technical Support at

+1.360.618.4363

be within the effective warranty period. If service is required, the OutBack Technical Support representative will issue a Return Material Authorization (RMA) number.

support@outbackpower.com

. To ensure warranty coverage, this contact must

+1.360.435.6030

or direct at

Troubleshooting

In the event of a Product failure, the customer will need to work with an OutBack Technical Support representative to perform the necessary troubleshooting. This is a required step before a return can be performed. Troubleshooting requires a qualified technician to be present at the site of the Product, with a quality voltmeter that measures both DC and AC. The OutBack representative will request voltmeter readings, Product error messages, and other information. Many, many problems can be resolved on-site. If the customer is not willing or able to provide these readings (or is not willing or able to visit the site), and the Product is found to have no problems upon return, OutBack may choose to charge additional labor and handling fees up to $180.00 U.S.

Return Material Authorization (RMA)

A request for an RMA number requires all of the following information:

1. Product model and serial number;

2. Proof-of-purchase in the form of a copy of the original Product purchase invoice or receipt

confirming the Product model number and serial number;

3. Description of the problem; and

4. Shipping address for the repaired or replacement equipment.

Upon receiving this information, the OutBack representative can issue an RMA number.

52 900-0020-01-00 Rev A

Warranty

Returning Product to OutBack

After receiving the RMA number, the customer must pack the Product(s) authorized for return, along with a copy of the original purchase invoice and warranty certificate, in the original Product shipping container(s) or packaging providing equivalent or reasonable protection. The RMA number must be written on the outside of the packaging where it is clearly visible.

If Product is within the warranty period, OutBack will cover pre-paid shipping with prior arrangement.

The Product(s) must be shipped back to OutBack Power Technologies in their original or equivalent packaging, to the following address:

OutBack Power Technologies

RMA # ____________________

6115 192nd Street NE

The customer must insure the shipment, or accept the risk of loss or damage during shipment. If a shipping box is needed for return of a Product, OutBack will send a shipping box upon request.

IMPORTANT:

OutBack is not responsible for shipping damage caused by improperly packaged Products, the repairs this damage might require, or the costs of these repairs.

Arlington, WA 98223 USA

If, upon receipt of the Product, OutBack determines the Product or Product part is defective and that the defect is covered under the terms of this Warranty, OutBack will then, and only then, ship a repaired or replacement Product or Product part to the purchaser freight prepaid, non-expedited, using a carrier of OutBack’s choice, where applicable.

If Product fails in ninety (90) or fewer days from original purchase date, OutBack will replace with a new Product. If Product fails after ninety (90) days and up to expiration of warranty, OutBack will, at its discretion, either repair and return a Product, or ship a replacement Product. OutBack will determine whether a Product is to be repaired or replaced in accordance with Product age and model. OutBack will authorize advance shipment of a replacement based on Product age and model.

In cases where an OutBack dealer or distributor replaces a Product more than ninety (90) days old with a new Product, OutBack will NOT compensate that dealer or distributor with new stock unless the exchange was authorized in advance by OutBack.

Out of Warranty

If Product is out of warranty, OutBack will repair and return Product for a fee. Alternately, if applicable, OutBack will advance-ship replacement parts for a fee upon request.

If a shipping box is needed for return of out-of-warranty Product, OutBack will send a shipping box upon request. The customer is responsible for paying shipping to OutBack.

The warranty period of any repaired or replacement Product or Product part is ninety (90) days from the date of shipment from OutBack, or the remainder of the initial warranty term, whichever is greater.

This Warranty is void for any Product that has been modified by the customer without authorization by OutBack. A Product with a voided warranty will be treated the same as one with an expired warranty.

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Warranty

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54 900-0020-01-00 Rev A

Index

10-year Warranty...............................................................50

12V AUX................................................................................30

Absorption Stage...............................................................21

AC Drop ................................................................................31

AC Input,...............................................................................17

AC Source Acceptance..............................................18, 47

AC Test Points.....................................................................33

Adding New Devices........................................................10

AGS.........................................................................................32

Audience ................................................................................1

AUX...........................................................................................2

AUX ........................................................................................30

AUX Functions

AC Drop...........................................................................31

Cool Fan..........................................................................30

Diversion.........................................................................30

Fault..................................................................................31

GenAlert...................................................................31, 32

LoadShed........................................................................31

Remote............................................................................31

Vent Fan..........................................................................31

Backup...................................................................................14

Battery Charging.........................................................21, 22

Battery Charging Graph ..................................................22

Charging

Absorption Stage.........................................................21

Float Stage .....................................................................23

Float Timer .....................................................................24

New Bulk.........................................................................24

None.................................................................................21

Compliance Testing..........................................................46

Cool Fan................................................................................30

CSA .................................................................................... 2, 46

Default Settings .................................................................47

Definitions..............................................................................2

Design ...................................................................................16

Disconnect...........................................................................42

Diversion ..............................................................................30

DVM................................................................................... 9, 10

Equalization.........................................................................25

Errors......................................................................................39

ETL ........................................................................................2, 7

Extended Warranty...........................................................50

Features .................................................................................. 7

Float Stage...........................................................................23

Functional Test.....................................................................9

Functions

AC Input Limit...............................................................17

AC Transfer.....................................................................19

Battery Charging..........................................................22

Inverting..........................................................................16

LBCO.................................................................................16

Offset................................................................................20

Search..............................................................................17

GenAlert.........................................................................31, 32

Generator.............................................................................11

Sizing................................................................................19

Grid Tied ...............................................................................12

Grid Use Timer....................................................................32

Grid-Interactive .................................................................... 2

HBX.........................................................................................32

High Battery Cut-Out........................................................16

High Battery Transfer (HBX) ...........................................15

900-0020-01-00 Rev A 55

Index

IEEE.................................................................................... 2, 46

Input Modes........................................7, 11, 17, 20, 22, 23

Input Priorities....................................................................17

Inverting ...............................................................................16

LBCO (Low Battery Cut-Out)..........................................16

Levels, Power Save............................................................29

LoadShed .............................................................................31

MATE or MATE2.................................................................... 7

MATE3 .....................................................................................8

Minigrid..........................................................................15, 32

Modes...................................................................................... 7

Backup.............................................................................14

Generator .......................................................................11

Grid Tied..........................................................................12

Minigrid....................................................................15, 32

Support ...........................................................................12

UP ......................................................................................14

Offset .....................................................................................20

Settings.................................................................................47

Silent...............................................................................23, 29

Specifications

Electrical..........................................................................45

Mechanical.....................................................................45

Environmental ..............................................................46

Regulatory......................................................................46

Stacking ................................................................................27

Parallel.............................................................................28

Startup.....................................................................................9

Support.................................................................................12

Symbols Used .......................................................................1

System Display .................................................................2, 8

Target ....................................................................................20

Temperature ................................................................40, 46

Temperature Compensation.........................................26

Terms and Definitions........................................................ 2

Test Points............................................................................33

Three-Stage Charging......................................................22

Timers

Absorption ..............................................................21, 24

Equalize...........................................................................25

Float..................................................................................24

Transfer Relay...............................................................17, 19

Troubleshooting.........................................................33, 52

Disconnect Messages.................................................42

Error Messages..............................................................39

Sell Status Messages...................................................43

Warning Messages ......................................................40

Parallel Stacking.................................................................28

Power Save ..........................................................................29

Powering Down .................................................................10

Registration .........................................................................49

Regulatory............................................................................46

RELAY AUX...........................................................................30

Remote System Display..................................................... 2

Remote Temperature Sensor (RTS) .............................26

Response Times .................................................................46

RTS............................................................................................2

Safety.......................................................................................1

General..............................................................................3

Search....................................................................................17

Sell Status.............................................................................43

56 900-0020-01-00 Rev A

UL ...................................................................................3, 7, 46

UP (Uninterruptible Power)............................................14

Utility Grid..............................................................................3

Vent Fan Control................................................................31

Warnings .............................................................................40

Warranty...............................................................................51

10-Year ............................................................................50

Contacting .....................................................................52

Extended.........................................................................50

Registration....................................................................49

RMA ..................................................................................52

Shipping..........................................................................53

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900-0020-01-00 Rev A

North America: 5917 – 195 Arlington, WA 98223 USA +1.360.435.6030

900-0020-01-00 Rev A

St NE, #7

Outback Power Systems GS8048 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual