OutBack Power Radian E Series Installation guide

Brand: OutBack Power

Model: Radian E Series

Type: Installation guide

Radian International Series

Inverter/Charger

GS7048E

GS3548E

Installation Manual

About OutBack Power

OutBack Power 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, batteries, accessories, and assembled systems.

Applicability

These instructions apply to OutBack inverter/charger models GS7048E and GS3548E only.

Contact Information

Address: 17825 – 59

Avenue N.E.

Suite B

Arlington, WA 98223 USA

Website: www.outbackpower.com

Disclaimer

UNLESS SPECIFICALLY AGREED TO IN WRITING, OUTBACK POWER:

(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.

OutBack Power cannot be responsible for system failure, damages, or injury resulting from improper

installation of their products.

Information included in this manual is subject to change without notice.

Notice of Copyright

Trademarks

OutBack Power and the OutBack Power logo are trademarks owned and used by OutBack Power,

an EnerSys company. These trademarks may be registered in the United States and other countries.

Date and Revision

September 2019, Revision A

Part Number

900-0144-01-02 Rev A

900-0144-01-02 Rev A 3

Table of Contents

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

Audience ......................................................................................................................................... 5

Symbols Used ................................................................................................................................. 5

General Safety ................................................................................................................................ 5

Welcome to OutBack Power .......................................................................................................... 6

Components and Accessories ........................................................................................................ 7

Planning ......................................................................................... 9

Applications ..................................................................................................................................... 9

Input Modes .............................................................................................................................................. 10

Renewable Energy ........................................................................................................................ 11

Battery Bank ................................................................................................................................. 11

Generator ...................................................................................................................................... 14

Generator Sizing ....................................................................................................................................... 14

Maintenance Bypass Switching .................................................................................................... 14

Installation ..................................................................................... 17

Location and Environmental Requirements .................................................................................. 17

Dimensions ................................................................................................................................... 17

Tools Required .............................................................................................................................. 1 9 

Mounting ....................................................................................................................................... 19

Component Mounting ............................................................................................................................... 21

Removing Front Cover .................................................................................................................. 22

Terminals and Ports ...................................................................................................................... 23

Wiring ............................................................................................................................................ 25

Grounding ................................................................................................................................................. 25

DC Wiring ................................................................................................................................................. 26

AC Wiring ................................................................................................................................................. 29

ON and OFF Wiring ...................................................................................................................... 32

Accessory Wiring ...................................................................................................................................... 33

AUX Wiring ............................................................................................................................................... 33

Generator Control ..................................................................................................................................... 35

AC Configurations ......................................................................................................................... 38

Single-Inverter .......................................................................................................................................... 38

Multiple-Inverter AC Installations (Stacking) ............................................................................................ 40

Stacking Configurations ........................................................................................................................... 43

Commissioning ............................................................................... 53

Pre-startup Procedures ............................................................................................................................ 53

Startup ...................................................................................................................................................... 53

Powering Down ........................................................................................................................................ 55

Adding New Devices ................................................................................................................................ 55

Operation ...................................................................................................................................... 55

Firmware Updates .................................................................................................................................... 56

.GIP File Installation for Grid Support ....................................................................................................... 57

Preventative Maintenance ............................................................................................................ 58

Definitions ..................................................................................................................................... 59

Index ............................................................................................ 61

Table of Contents

4 900-0144-01-02 Rev A

List of Tables

Table 1 Components and Accessories ............................................................................................ 7

Table 2 Battery Bank Elements ...................................................................................................... 12

Table 3 Ground Conductor Size and Torque Requirements .......................................................... 25

Table 4 DC Conductor Size and Torque Requirements ................................................................. 27

Table 5 Changing Master Power Save Levels (GS7048E) ............................................................ 52

Table 6 Terms and Definitions ....................................................................................................... 59

List of Figures

Figure 1 Radian Series Inverter/Charger....................................................................................... 6

Figure 2 Radian Inverter and Accessories .................................................................................... 7

Figure 3 Applications (Example) ................................................................................................... 9

Figure 4 Bypass Switching .......................................................................................................... 15

Figure 5 Bypass Switching for Multiple Inverters ......................................................................... 15

Figure 6 Dimensions ................................................................................................................... 1 7 

Figure 7 System Dimensions ...................................................................................................... 18

Figure 8 Installing the Mounting Plate ......................................................................................... 19

Figure 9 Mounting the Inverter .................................................................................................... 20

Figure 10 Mounting for System Components ................................................................................ 21

Figure 11 Removing the Front Cover ............................................................................................ 22

Figure 12 DC Terminals, Ribbon Cables, and Auxiliary Terminals ............................................... 23

Figure 13 AC Terminals, Ports, and Ground Bus .......................................................................... 24

Figure 14 Chassis Ground TBB .................................................................................................... 25

Figure 15 GS7048E and GS3548E Battery Terminals .................................................................. 27

Figure 16 DC Cable Hardware (Radian inverter) .......................................................................... 28

Figure 17 AC Terminals ................................................................................................................ 29

Figure 18 AC Sources ................................................................................................................... 3 1 

Figure 19 ON/OFF Jumper and Connections ................................................................................ 32

Figure 20 Accessory Connections .................................................................................................

33

Figure 21 AUX Connections for Vent Fan (Example) .................................................................... 34

Figure 22 AUX Connections for Diversion (Example) ................................................................... 34

Figure 23 Two-Wire Generator Start (R

ELAY AUX) ........................................................................ 35

Figure 24 Two-Wire Generator Start (12V

AUX) ............................................................................ 36

Figure 25 Three-Wire Generator Start (Example) ......................................................................... 37

Figure 26 Single-Inverter AC System ............................................................................................ 38

Figure 27 Single-Inverter AC Wiring with GS Load Center ........................................................... 39

Figure 28 OutBack Communications Manager and System Display ............................................. 40

Figure 29 Example of Parallel Stacking Arrangement (Three Inverters) ....................................... 43

Figure 30 Parallel Wiring ............................................................................................................... 44

Figure 31 Parallel Wiring with GSLC ............................................................................................. 45

Figure 32 Example of Three-Phase Stacking (Three Inverters) .................................................... 46

Figure 33 Example of Three-Phase Stacking (Nine Inverters) ...................................................... 46

Figure 34 Three-Phase AC System .............................................................................................. 48

Figure 35 Three-Phase AC Wiring with GS Load Centers ............................................................ 49

Figure 36 Power Save Levels and Loads ...................................................................................... 50

Figure 37 GS7048E Power Save Priority ...................................................................................... 51

Figure 38 AC Test Points .............................................................................................................. 54

Figure 39 Grid Support Screens .................................................................................................... 57

900-0144-01-02 Rev A

Introduction

Audience

This book provides instructions for the physical installation and wiring of this product.

These instructions are for use by qualified personnel who meet all local and governmental code

requirements for licensing and training for the installation of electrical power systems with AC and

DC voltage up to 600 volts. This product is only serviceable by qualified personnel.

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.

NOTE:

This type of notation indicates useful information. This symbol is not always used.

MORE INFORMATION

When this symbol appears next to text, it means that more information is available in other manuals relating to the

subject. The most common reference is to the Radian International Series Inverter/Charger Operator’s Manual.

Another common reference is the system display manual.

General Safety

WARNING: Limitations on Use

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

equipment or devices.

WARNING: Reduced Protection

If this product is used in a manner not specified by GS product literature, the product’s

internal safety protection may be impaired.

CAUTION: Equipment Damage

Only use components or accessories recommended or sold by OutBack Power or its

authorized agents.

Introduction

900-0144-01-02 Rev A

Welcome to OutBack Power

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.

Figure 1 Radian Series Inverter/Charger

NOTE

This product has a settable AC output range. In this book, many references to the output

refer to the entire range. However, some references are made to 230 Vac or 50 Hz output.

These are intended as examples only.

Outback Power Technologies Intuitive Control System for Renewable Energy

Designed to be integrated as part of an OutBack Grid/Hybrid™ system

Battery-to-A

C inverting which delivers single-phase power (220 to 240 Vac at 60 or 50 Hz)

Model GS7048E can continuously produce 7 kVA (30 Aac)

Model GS3

548E can continuously produce 3.5 kVA (1

5 Aac)

Mounts e

asily with supplied mounting plate

All terminals exit at the bottom of the inverter, allowing the

installer to use a single distribution box; the GS Load Center

(GSLC) is specifically designed for this purpo

Uses the MATE3™ class of System Display and

Controller product

s (see ne

xt page), or the AXS Port™

SunSpec Modbus Interface (sold separately) for user

interface as part of a Grid/Hybrid system

Suppo

rts the OPTICS RE™ online tool

for a cloud-based

remote monitoring and control application

 Requires MATE3-class device or AXS Port

 Vis

it www.outbackpower.com to download

Uses the HUB™ Series Communications Manager for

networking as part of a Grid/Hybrid system

Features versatile mounting locations for the MATE3 and

HUB products, FLEXmax charge controller, and GSLC

The venting on the cover allows mounting of multiple Radi

inverters side by side with minimal clearance between them

Uses spring-based AC terminals instead of screw-based terminals;

this eliminates torque requirements and periodic re-tightening

Up to 10 Radian inverter/chargers can be stacked together

Introduction

900-0144-01-02 Rev A

Components and Accessories

IMPORTANT:



The Radian inverter is only compatible with the MATE3 class of system display products.

Radian revision 001.005.004 or lower can be used with any revision of MATE3s but can only

be used with MATE3 revision 002.017.000 or higher.

 To operate a Radian with firmware revision 001.006.063 or higher, the following is required:

 A MATE3s system display with revision 001.001.000 or higher.

 A MATE3 system display with revision 003.0017.001 or higher.

 The Radian inverter is not intended for use with the OutBack MATE or MATE2 products. Use

of these products is not supported with the Radian Series.

Table 1 Components and Accessories

Included in Box

Radian International Series Inverter/Charger Quick Start Guide

Mounting Bracket

RTS (Remote Temperature Sensor) Hardware Kit

Optional Components for Attachment to Radian Inverter

MATE3-class System Display and Controller FLEXmax Series Charge Controller

GSLC (GS Load Center) series HUB Series Communications Manager

Figure 2 Radian Inverter and Accessories

NOTE: The system display is required if any Radian

functions need adjustment from the factory default settings.

GSLC

Charge Controllers

HUB

Communications

Manager

MATE3s System Display

Introduction

8 900-0144-01-02 Rev A

NOTES:

900-0144-01-02 Rev A

Planning

Applications

OutBack inverter/chargers are designed to use a battery bank to store energy. They work together

with power from the utility grid or from renewable energy sources, such as photovoltaic (PV)

modules, wind turbines, and other renewable sources. These sources charge the battery, which is

used by the inverter.

The Radian inverter has two sets of AC input terminals. Two AC sources, such as a gas or diesel

generator and the utility grid, can be connected. Other combinations of AC sources are possible.

NOTE:

The inverter can only accept one source at a time. The input marked

RID

has priority,

although this can be changed.

The Radian inverter’s settings can be changed to accommodate many applications. These include

off-grid, backup, and grid-interactive applications.

This product includes grid support functionality. See the

Operator’s Manual

for more information.

Contact the utility company for any specific installation requirements.

Figure 3 Applications (Example)

AC IN*

Utility Grid

AC Generator

AC OUT

AC IN*

Loads

AC OUT

DC OUT

Load

Support

Battery

Charging

AC or PV

PV Harvest

Charge

Controlle

DC IN

*Two sources utilizin

arate inverter in

uts with an internal selection function

Planning

10 900-0144-01-02 Rev A

Input Modes

The Radian inverter has many modes of operation. See the

Radian International Series

Inverter/Charger Operator’s Manual

for additional information on these modes, including reasons

and considerations for using each mode.

The modes determine how the inverter interacts with an AC source. Each mode has functions and

priorities that are intended for a designated application. Each of the Radian’s two AC inputs can be

set to a different operating mode to support different applications.

Generator

: This mode enables the battery charging function to tolerate a wider range of generator

performance and waveform irregularities than other modes. The Radian can use generator power even

when the generator is substandard.

Support

: This mode is intended for systems using 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. The inverter uses battery power and

additional sources to ensure that the loads receive the power they demand.

Grid Tied

: This mode is intended for grid-interactive systems that are net metered. Once the battery is

charged and protected loads are served, the inverter will export power to the utility grid. Grid support

functionality is available in this mode.

UPS

: This mode is intended for systems primarily intended to maintain power to the loads without any

interruption when switching between AC input and batteries. The response speed has been increased so

that if an AC disconnect occurs the response time will be minimized.

Backup

: This mode is intended for systems that have the utility grid or a generator available, but do not

have specialty requirements such as selling or support. The AC source will flow through the Radian

inverter to power the loads unless power is lost. If power is lost, then the Radian inverter will supply

energy to the loads from the battery bank until the AC source returns.

Mini Grid

: This mode is intended for systems that have the utility grid as an input and a sizable amount

of renewable energy. It behaves like an off-grid system using the utility grid as a backup generator. The

system will use the renewable energy until the battery voltage falls to a specified low level. When this

occurs, the Radian inverter will connect to the utility grid to power the loads. The inverter will disconnect

from the utility grid when the batteries are sufficiently recharged.

GridZero

This mode is intended for systems that have the utility grid as an input and a sizable amount of

renewable energy. The loads will remain connected to the utility grid, but will only draw power from it

when no other power is

available. The default power sources are the batteries and renewable energy,

which attempt to “zero” the use of the AC source. This mode does not allow the inverter to charge

batteries or sell. The batteries are discharged and recharged while remaining grid-connected.

Grid support functionality is available in this mode.

Programming

Selection of the input modes and all other inverter programming are performed using a system

display such as the MATE3s. This product can customize a wide range of parameters.

Planning

900-0144-01-02 Rev A

Renewable Energy

The Radian inverter cannot connect directly to PV, wind turbines, or other unregulated DC sources.

The batteries are the inverter’s primary source of power.

A renewable energy source is always treated as a battery charger, even if all of its power is used

immediately by the inverter. The renewable source must have a charge controller, or some other

regulation method, to prevent overcharging. OutBack Power’s FLEXmax family of charge

controllers can be used for this purpose, as can other products.

The GSLC will receive the electrical connections for up to two FLEXmax 60 or FLEXmax 80 charge

controllers. These can be mounted on the side of the system. It can receive the electrical

connections for two FLEXmax 100 controllers, which are mounted separately.

Battery Bank

When planning a battery bank, consider the following:

Cables:

Recommendations for battery cable size and length are shown on page 27. The maximum

length will determine the placement of the battery bank. Local codes or regulations may apply and may

take priority over OutBack recommendations.

o Battery Type: The Radian inverter/charger uses a three-stage charge cycle.

 The default inverter/charger settings assume a deep-cycle stationary lead-acid battery. The charging

configuration is highly customizable so that lithium-ion and other advanced chemistry charging cycles

can be accommodated. Consult the documentation for the specific batteries used in the system to

ensure that the settings are appropriate.

 The Radian inverter/charger is designed to work with a 48-volt battery bank. Before constructing a

battery bank, confirm the nominal voltage of individual batteries.

Charger Settings and Maintenance:

A vented battery enclosure may be required by electric code

and is usually recommended for safety reasons.

It may be necessary to use a fan to ventilate the

battery enclosure.

Batteries must be regularly maintained according to the instructions of the battery manufacturer.

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.

CAUTION: Hazard to Equipment

Batteries can emit flammable vapors. These vapors are also corrosive over long periods.

Installing the inverter in the battery compartment may cause corrosion which is not covered

by the product warranty. (Sealed batteries may be an exception.)

Planning

12 900-0144-01-02 Rev A

Bank Size:

Battery bank capacity is measured in amp-hours. Determine the required bank

specifications as accurately as possible, beginning with the items below. This avoids underperformance

or wasted capacity.

These ten items are obtainable in different places, summarized in Table 2. Some of the information is

specific to the site or application. Some can be obtained from the battery manufacturer. Information on

OutBack products is available from OutBack Power or its dealers.

A. Size of load:

B. Daily hours of use:

C. Days of autonomy:

D. Application: This often helps define or prioritize the previous three items. Off-grid systems often

require enough capacity to last for an extended period before recharging. Grid-connected systems

frequently need only enough capacity for short-term backup during outages.

E. Conductor efficiency: Wire size and other factors

will waste power due to resistance and voltage drop.

Typical acceptable efficiency is 96 to 99%.

F. Inverter efficiency: Radian specifications list

“Typical Efficiency” to help estimate operating loss.

G. System DC voltage: The Radian inverter

requires nominal 48 Vdc to operate.

H. Battery voltage: Most individual battery

voltages are less than the system DC voltage.

The batteries need to be placed in series to

deliver the correct voltage.

I. Capacity: Battery capacity, which is measured

in ampere-hours (amp-hours or Ah), is not

usually a fixed number. It is specified based

on the rate of discharge. For example, the

OutBack EnergyCell 200RE is rated at

139.6 Ah when discharged at the 4-hour rate

(to terminal voltage 1.75 volts per cell or Vpc).

This is a high rate of discharge that would

hypothetically drain the battery in 4 hours.

The same battery is rated at 178 Ah when

used at the 20-hour rate.

In general, use the 8-hour capacity or less.

The larger the load, the more severe the

discharge. In these cases conservative values

with faster discharge times from the table (for

example, the 2- or 3-hour capacity) are better.

To choose accurately, the best method is to divide each Ah figure by the discharge in hours. (An

example from Table 2 for the OutBack 200RE would be 132 ÷ 3 hours = 44 Adc.) If the number is

equal or greater than the load size (in DC amperes), that column can be used as the capacity.

NOTES:

 The battery’s selected rated capacity may have little to do with the actual hours of use; this figure

simply reflects the rate of discharge.

 Capacity ratings are for batteries at 25°C. Capacity is reduced at cooler temperatures.

J. Maximum depth of discharge (DoD): Most batteries cannot be discharged below a certain level

without damage. The bank requires enough total capacity to keep this from happening. DoD is

usually described as a percentage, although it is shown as a decimal in calculations.

Efficiency losses will amount to

redu

ction in the available amp-hour

capacity. The battery bank size can

be increased to account for losses.

These are the most basic

and essential factors used

to determine bank size.

Table 2 Battery Bank Elements

Item Source of information

. Load Size

Site-specific

. Daily Hours

Site-specific

. Days of Autonomy

Site-specific

. Application

Site-specific

. Conductor Efficiency

Site-specific

. Inverter Efficiency

Inverter manufacturer

. System Vdc

Inverter manufacturer

. Battery Vdc

Battery manufacturer

Capacity Ah

Battery manufacturer

Example:

Model

Discharge in Hours

2 3 4 8 20

200RE 103.0 120.0 132.0 139.6 158.4 178.0

220GH 133.5 — 166.2 173.2 188.8 214.0

. Maximum DoD

Battery manufacturer

Planning

900-0144-01-02 Rev A 13

To Calculate Minimum Battery Bank Size (refer to previous page for letter designations):

1. The load size, item A, is measured in watts. Compensate this figure for efficiency loss. Multiply the

conductor efficiency by the inverter efficiency (E × F). (These items are represented as percentages, but

may be displayed as decimals for calculation.) Divide item A by the result.

2. Convert the compensated load into amperes (Adc). Divide the step 1 result by the system voltage (G).

3. Determine the best battery capacity (I) by dividing each rated capacity by the time in hours (as shown in

Table 2). This is the estimated discharge rate at that battery capacity. The number is usable if the step 2

result (the actual load rate) does not exceed it. Choose the closest (or smaller) rated amp-hour capacity.

4. Determine the daily load consumption in ampere-hours (Ah). Multiply the step 2 result by the daily usage

hours (item B).

5. Adjust the total for required days of autonomy (the days the system must operate without recharging) and

the maximum DoD. Multiply the step 4 result by C and divide by J.

The result is the total amp-hour capacity required for the battery bank.

6. Determine the number of parallel battery strings required. Divide the Ah figure from step 5 by the

individual battery capacity (I) determined in step 3. Round the result to the next highest whole number.

7. Determine the total number of batteries required. Divide the system voltage by the battery voltage

(G ÷ H). Multiply the result by the step 6 result.

The result is the total required quantity of the chosen battery model.

EXAMPLE #1

. Backup loads: 0.9 kW (900 W)

. Hours of use: 8

. Days of autonomy: 1

. Grid-interactive system

(GS3548E inverter)

. Conductor efficiency: 98% (0.98)

. Inverter efficiency: 92% (0.92)

. System voltage: 48 Vdc

. Batteries: OutBack EnergyCell

220GH (12 Vdc)

. Capacity determined at 8-hour rate: 188.8 Ah

. Maximum DoD: 80% (0.8)

EXAMPLE #2

. Backup loads: 1.65 kW (1650 W)

. Hours of use: 8

. Days of autonomy: 2

. Off-grid system (GS3548E inverter)

. Conductor efficiency: 97% (0.97)

. Inverter efficiency: 92% (0.92)

. System voltage: 48 Vdc

. Batteries: OutBack EnergyCell

200RE (12 Vdc)

. Capacity determined at 3-hour rate: 132 Ah

. Maximum DoD: 50% (0.5)

1. A ÷ [E × F] 900 ÷ (0.98 × 0.92) = 998.2 W

2. 1 ÷ G 998.2 ÷ 48 = 20.8 Adc

3. I = Ah ÷ hours 188.8 ÷ 8 = 23.6 Adc (larger than 20.8;

Compare to 2 this means 188.8 Ah is acceptable)

4. 2 × B 20.8 × 8 = 166.4 Ah

5. [4 × C] ÷ J [166.4 × 1] ÷ 0.8 = 208.0 Ah

6. 5 ÷ I 208.0 ÷ 188.8 = 1.10 (rounded to 2)

7. [G ÷ H] × 6 [48 ÷ 12] × 2 strings = 8 batteries

1. A ÷ [E × F] 1650 ÷ (0.97 × 0.92) = 1848.9 W

2. 1 ÷ G 1848.9 ÷ 48 = 38.5 Adc

3. I = Ah ÷ hours 132 ÷ 3 = 44 Adc (larger than 38.5;

Compare to 2 this means 119.1 Ah is acceptable)

4. 2 × B 38.5 × 8 = 308.2 Ah

5. [4 × C] ÷ J [308.2 × 2] ÷ 0.5 = 1232.6 Ah

6. 5 ÷ I 1232.6 ÷ 132 = 9.3 (rounded to 10)

7. [G ÷ H]

× 6 [48 ÷ 12] × 10 strings = 40 batteries

Planning

14 900-0144-01-02 Rev A

Generator

These Radian models can work with any single-phase generator that delivers reliable AC power

at the appropriate system voltage and frequency. These models can work with three-phase

generators when stacked for three-phase output.

The inverter/charger can provide a start signal to control an automatic start generator. If automatic

generator starting is required, the generator must be an electric-start model with automatic choke. It

should have two-wire start capability. For other configurations, additional equipment may be required.

In any configuration, the inverter may need to be specifically programmed with the system display.

Perform all programming according to the specifications of the generator and the required operation of

the inverter. Parameters to be programmed may include generator size, automatic starting requirements,

and potential fluctuations in generator AC voltage.

A generator that is to be installed in a building usually should not have a bond between the neutral and

ground connections. The generator should only be bonded if there is a specific need. See page 25 for

more information on neutral-ground bonding.

Generator Sizing

A generator should be sized to provide enough power for all expected use.

A conservative estimate assumes that both the loads and charging will be maximized at the same time.

However, this can result in an oversized generator with inefficient operation.

A smaller generator may be used for average loads with the inverter’s

Support

mode providing support

from the batteries during peak loads. The loads can be manually disconnected while charging.

In general, the generator should be sufficiently powerful to handle all necessary load surges.

Other considerations:

Available generator power may be limited by ratings for circuit breakers and/or generator connectors.

The maximum allowed AC circuit breaker size is 50 Aac per Radian inverter/charger.

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. This statement may not apply to inverter-based generators,

which typically have more stable voltage and frequency regulation.

Maintenance Bypass Switching

Inverter systems are often equipped with AC maintenance bypass switches or interlocks. If the

inverter system ever needs to be shut down or removed, the AC sources and loads must be

disconnected. A bypass device allows the AC source to deliver power directly to the loads,

bypassing the inverter as shown in Figure 4. This can minimize disruption to the system and avoids

the need for extensive rewiring.

The GS Load Center (GSLC) can be equipped with bypass circuit breakers for this purpose.

However, if multiple Radian inverters are stacked in a single system, then the GSLC bypass kits

should not be used. The bypass function must be simultaneous for all inverters. The GSLC bypass

kits operate independently, not simultaneously.

Planning

900-0144-01-02 Rev A

Figure 4 Bypass Switching

Both manual and automatic double-throw bypass switches are commonly available in a range of

sizes and options. These are highly recommended for systems with more than a single inverter.

WARNING: Shock Hazard or Equipment Damage

Using independent bypass devices on multiple inverters can result in power being routed to

inappropriate places. This could create an electric shock hazard or damage the equipment.

Figure 5 Bypass Switching for Multiple Inverters

AC Source

AC Loads

GSLC Bypass

Inoperative

Radian

Inverter

Input Wiring Output Wiring

AC Source AC Loads

Output Wiring

Inactive Radian

Inverters

GSLC Bypass Devices

(not to be used)

External Bypass Device

Input Wiring

Planning

16 900-0144-01-02 Rev A

NOTES:

900-0144-01-02 Rev A

Installation

Location and Environmental Requirements

Radian series inverter/chargers must be located indoors or in a weather-proof enclosure. They

are not designed for exposure to water, salt air, or excessive wind-blown dust and debris.

The Radian inverter must be wall-mounted in an upright position. The inverter is not approved for

mounting in any other position or orientation.

These inverters will perform more efficiently in locations offering plenty of air circulation. The minimum

recommended clearance is 5 cm (2 inches) on all sides of the inverter.

The sides and bottom may be enclosed or obscured with no restriction when mounting accessory devices

or one other inverter. If more than two Radian inverters are installed side by side with the GSLC, the

inverters should be separated by at least 2.3 cm (0.9 inches) to accommodate the GSLC hinged doors.

These inverters will operate normally in a range of –20°C to 50°C (–4°F to 122°F). Maximum output will

begin to decline at ambient temperatures above 25°C (77°F).

The allowable temperature range for storage is –40°C to 60°C (–40°F to 140°F).

These inverters carry an Ingress Protection (IP) rating of 20 and a Relative Humidity (RH) rating of 93%

(non-condensing).

The specifications are listed in the Radian International Series Inverter/Charger Operator’s Manual.

Dimensions

Figure 6 Dimensions

Enclosure Height

71.1 cm (28”)

Mounting Hole Spacing 5.0 cm (1.97")

Enclosure

Height with

Flange

74 cm (29.1”)

Width 40.6 cm

(16”)

Depth 22 cm

(8.75")

The dimensions of an assembled system with mounting plate and GSLC are shown on the next page.

Installation

900-0144-01-02 Rev A

Figure 7 System Dimensions

Width 40.6 cm (16.0”)

1.1 cm (0.45”)

1.1 cm

(

0.45”

)

34.8 cm

(

13.7”

)

71.1 cm

(28”)

73.7 cm

(29.0”)

31.8 cm

(12.5”)

114.3 cm

(45.0”)

22.2 cm

(8.75”)

35.6 cm (14.0”)

This illustration can be used as a basic template

for planning layouts, marking mounting holes, etc.

when installing a system.

The requirements for mounting the Radian

inverter are described beginning on the next page.

Installation

900-0144-01-02 Rev A

Tools Required

The following tools may be required for this installation:

Wrench and socket sets; should include

 torque and ratchet wrenches

 reversible (stubby) wrenches for narrow access

 offset box wrench, ½” or 13 mm

Wire cutters/strippers

Mounting

Two or more people may be needed to install the Radian inverter/charger due to its weight.

Mount and secure each component before attaching any wiring. Local or national wiring codes may

require the bottom of the inverter to be enclosed. The GS Load Center was specifically designed for

this purpose.

Avoid large air gaps behind the Radian inverter/charger and its mounting plate. These can result

in louder mechanical noise during heavy inverting or charging. Mount the plate on a flat, solid

mounting surface.

IMPORTANT:

Use correct fasteners to secure the mounting plate and the Radian inverter/charger to the

mounting surface. OutBack cannot be responsible for damage to the product if it is attached with

inadequate fasteners.

The Radian inverter/charger comes equipped with a mounting plate, as shown in Figure 8.

Figure 8 Installing the Mounting Plate

Mount the Radian inverter using

these steps.

1. The mounting plate is to be

screwed or bolted directly to a

solid mounting surface such as

wall studs. Lag screws are

provided for this purpose.

 The plate is designed to mount

on wall studs with a spacing of

40.6 cm (16”). If the structure or

mounting surface is constructed

differently, then ensure the

mounting surface is reinforced for

the appropriate amount of weight.

 If multiple Radian inverter/chargers

are being installed, all mounting

plates should be installed first.

The inverters can be mounted

and secured one at a time when

this is done.

Continued on the next page…

40.6 cm

(

16.0”

)

Mounting

20.3 cm

(

8.0”

)

15.2 cm

(6.0”

)

10.4 cm

(4.1”)

12.7 cm

(5.0”

)

Insulated screwdriver set (flat and Phillips);

should include

 #2 Phillips screwdriver 38 to 41 cm long

Long-nose pliers

High-resolution voltmeter

Installation

900-0144-01-02 Rev A

Figure 9 Mounting the Inverter

Radian

Mountin

× ×

3. Align the left edge of the inverter with the left edge of

the mounting plate. This will expose the right edge of

the plate, allowing easy installation of another Radian

inverter/charger in the future. All additional inverters

are mounted to the right of the existing unit.

The unit shown to the right is not aligned with the

mounting plate, as the plate is still visible. In this

example, it should slide to the left so that the plate is

entirely covered.

NOTE: If the GS Load Center is used with

the Radian inverter, the following step should

be omitted.

4. Once aligned, secure the Radian inverter

to the stud using a lag screw (provided) in the left

corner of the inverter’s bottom flange.

Securing the inverter this way will prevent it from

dislodging from the mounting plate in the event of an

earthquake or similar event.

NOTE: The left corner is used for securing the

inverter to a stud. If the Radian inverter is mounted

on plywood or a similar wide-area mounting surface

as shown, any of the slots in the mounting flange

may be used.

2. Place the Radian inverter against the wall and slide

it directly over the upper lip of the mounting plate.

The inverter’s mounting flange should come to rest

within the lip so that it hangs securely.

To assist in alignment, dimples have been placed

on the side of the unit to mark the lower edge of the

flange. In the picture to the left, the two x symbols

show the location of the dimples.

WARNING: Shock Hazard

When the inverter is used with other metal chassis, make sure that all chassis are grounded

appropriately. (See the grounding instructions on page 25.) Grounding other chassis may

involve metal-to-metal contact or separate ground wires.

…continued from the previous page…

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