OutBack Power Radian GS8048A User manual

Radian Series Inverter/Charger
GS8048A
GS4048A
Installation 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, batteries, accessories, and assembled systems.
Grid/Hybrid™
As a leader in off-grid energy systems designed around energy storage, OutBack Power is an innovator in
Grid/Hybrid system technology, providing the best of both worlds: grid-tied system savings during normal or
daylight operation, and off-grid independence during peak energy times or in the event of a power outage or an
emergency. Grid/Hybrid systems have the intelligence, agility and interoperability to operate in multiple energy
modes quickly, efficiently, and seamlessly, in order to deliver clean, continuous and reliable power to residential
and commercial users while maintaining grid stability.
Contact Information
Address:
Corporate Headquarters
17825 – 59th Avenue N.E.
Suite B
Arlington, WA 98223 USA
European Office
Hansastrasse 8
D-91126
Schwabach, Germany
Telephone:
+1.360.435.6030
+1.360.618.4363 (Technical Support)
+1.360.435.6019 (Fax)
+49.9122.79889.0
+49.9122.79889.21 (Fax)
Email:
[e-mail]
Website:
http://www.outbackpower.com
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.
OutBack Power Technologies 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
Radian Series Inverter/Charger Installation Manual © 2013 by OutBack Power Technologies. All Rights Reserved.
Trademarks
OutBack Power, the OutBack Power logo, FLEXpower ONE, and Grid/Hybrid are trademarks owned and used by
OutBack Power Technologies, Inc. The ALPHA logo and the phrase “member of the Alpha Group” are trademarks
owned and used by Alpha Technologies Inc. These trademarks may be registered in the United States and other
countries.
Date and Revision
February 2014, Revision A
Part Number
900-0160-01-00 Rev A

900-0160-01-00 Rev A 1
Table of Contents
Introduction.................................................................................................3
Audience .................................................................................................................................................................................3
Welcome to OutBack Power Technologies.................................................................................................................3
Components and Accessories .........................................................................................................................................4
Planning ......................................................................................................5
Applications ...........................................................................................................................................................................5
Input Modes............................................................................................................................................................................................ 6
Renewable Energy ...............................................................................................................................................................6
Battery Bank ...........................................................................................................................................................................7
Generator ................................................................................................................................................................................9
Maintenance Bypass Switching ................................................................................................................................... 10
Installation .................................................................................................11
Location and Environmental Requirements............................................................................................................ 11
Dimensions.......................................................................................................................................................................... 11
Tools Required.................................................................................................................................................................... 13
Mounting.............................................................................................................................................................................. 13
Component Mounting......................................................................................................................................................................15
Removing Front Cover .................................................................................................................................................... 16
Terminals and Ports.......................................................................................................................................................... 17
Wiring .................................................................................................................................................................................... 19
Grounding .............................................................................................................................................................................................19
DC Wiring...............................................................................................................................................................................................20
AC Wiring ...............................................................................................................................................................................................22
Accessory Wiring.................................................................................................................................................................................25
AUX Wiring............................................................................................................................................................................................26
Generator Control ..............................................................................................................................................................................27
AC Configurations............................................................................................................................................................. 31
Single-Inverter .....................................................................................................................................................................................31
Multiple-Inverter AC Installations (Stacking)...........................................................................................................................33
Functional Test................................................................................................................................................................... 38
Preventative Maintenance............................................................................................................................................. 38
Symbols, Terms, and Definitions ..................................................................39
Symbols Used ..................................................................................................................................................................... 39
Definitions............................................................................................................................................................................ 39
Index .........................................................................................................41

Table of Contents
2 900-0160-01-00 Rev A
List of Tables
Table 1 Components and Accessories......................................................................................................... 4
Table 2 Battery Bank Elements....................................................................................................................... 8
Table 3 Ground Conductor Size and Torque Requirements..............................................................19
Table 4 DC Conductor Size and Torque Requirements .......................................................................21
Table 5 Terms and Definitions ......................................................................................................................39
List of Figures
Figure 1 Radian Series Inverter/Charger.................................................................................................. 3
Figure 2 Radian Inverter and Accessories ............................................................................................... 4
Figure 3 Applications (Example)................................................................................................................. 5
Figure 4 Bypass Switching..........................................................................................................................10
Figure 5 Bypass Switching for Multiple Inverters ...............................................................................10
Figure 6 Dimensions.....................................................................................................................................11
Figure 7 System Dimensions .....................................................................................................................12
Figure 8 Installing the Mounting Plate...................................................................................................13
Figure 9 Mounting the Inverter ................................................................................................................14
Figure 10 Mounting for System Components........................................................................................15
Figure 11 Removing the Front Cover........................................................................................................16
Figure 12 DC Terminals, Ribbon Cables, and Auxiliary Terminals ...................................................17
Figure 13 AC Terminals, Ports, and Ground Bus....................................................................................18
Figure 14 Chassis Ground TBB.....................................................................................................................19
Figure 15 GS8048A and GS4048A Battery Terminals...........................................................................20
Figure 16 DC Cable Hardware (Radian inverter)....................................................................................21
Figure 17 AC Terminals ..................................................................................................................................22
Figure 18 AC Sources......................................................................................................................................24
Figure 19 Accessory Connections ..............................................................................................................25
Figure 20 ON/OFF Jumper and Connections..........................................................................................25
Figure 21 AUX Connections for Vent Fan (Example)............................................................................26
Figure 22 AUX Connections for Diversion (Example) ..........................................................................27
Figure 23 Two-Wire Generator Start (RELAY AUX)................................................................................28
Figure 24 Two-Wire Generator Start (12V AUX).....................................................................................28
Figure 25 Three-Wire Generator Start (Example)..................................................................................29
Figure 26 Single-Inverter AC System.........................................................................................................31
Figure 27 Single-Inverter AC Wiring with GS Load Center.................................................................32
Figure 28 OutBack Communications Manager and System Display..............................................33
Figure 29 Example of Parallel Stacking Arrangement (Three Inverters)........................................35
Figure 30 Parallel Wiring................................................................................................................................36
Figure 31 Parallel Wiring with GSLC ..........................................................................................................37

900-0160-01-00 Rev A 3
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.
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.
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 120/240 Vac or 60 Hz output.These are
intended as examples only.

Designed to be integrated as part of an OutBack
Grid/Hybrid™ system
Battery-to-AC inverting which delivers split-phase power
(100/200 Vac to 120/240 Vac at 60 or 50 Hz)
Model GS8048A can continuously produce 8 kVA (33 Aac)
Model GS4048A can continuously produce 4 kVA (16 Aac)
Mounts easily 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 purpose
Uses spring-based AC terminals instead of screw-based
terminals; this eliminates torque requirements and periodic
re-tightening
Uses the MATE3™ System Display and Controller (sold
separately) for user interface as part of a Grid/Hybrid system
Uses the HUB™ Series Communications Manager for
networking as part of a Grid/Hybrid system
Features versatile mounting locations for the MATE3, HUB,
FLEXmax charge controller, and GSLC
The venting on the cover allows mounting of multiple Radian
inverters side by side with minimal clearance between them
Up to 10 Radian inverter/chargers can be stacked together

Introduction
4 900-0160-01-00 Rev A
Components and Accessories
IMPORTANT:
This product is not compatible with the OutBack MATE or MATE2 System Display and
Controller. Use of these products is not supported with the Radian Series.
IMPORTANT:
This product is not stackable with the GS8048 inverter. See page 32.
Table 1 Components and Accessories
Included in Box
Radian Series Installation Manual (this book) RTS (Remote Temperature Sensor)
Radian Series Operator’s Manual Hardware Kit
Mounting Bracket
Optional Components for Attachment to Radian Inverter
MATE3 System Display and Controller FLEXmax Series Charge Controller
FW-MB3 (MATE3 bracket) FW-CCB or FW-CCB2 (charge controller brackets)
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
MATE3 System Display

900-0160-01-00 Rev A 5
Planning
Applications
The Radian Series Inverter/Charger is intended for both off-grid and grid-interactive (Grid/Hybrid)
applications. It is designed to use a battery bank to store energy. It can work in conjunction with
photovoltaic (PV) modules to harvest solar energy, as well as wind turbines and other renewable
sources. These sources charge the battery, which in turn 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 to the inverter. Other combinations of AC sources
are possible.
NOTE: The inverter can only accept one source at a time. The input marked Grid has priority,
although this can be changed.
The Radian inverter’s settings can be changed to accommodate many applications.
Figure 3 Applications (Example)

Planning
6 900-0160-01-00 Rev A
Input Modes
The Radian inverter has seven modes of operation. These modes determine how the Radian 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, so that
different applications can be supported.
Generator: This mode is intended for a wide range of AC sources, including generators with a rough or
imperfect AC waveform. The Radian can charge from the generator even when the generator is undersized
or substandard.
Support: This mode is intended for systems using the utility grid or a generator. AC source size, wiring, or
other limitations may require temporary assistance to run very large loads. The Radian adds inverter and
battery power to the AC source to ensure that the loads receive the power they require.
Grid Tied:This mode is intended for grid-interactive systems. When renewable energy sources charge the
batteries above a selected “target” voltage, the Radian inverter will send the excess energy to any loads. If
the loads do not use all the excess energy, then the Radian will return (sell) that energy to the utility grid.
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. The system will run off 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
Radian inverter will disconnect from the utility grid when the batteries are sufficiently recharged.
Grid Zero: This mode is intended for systems that have the utility grid as an input and a sizable amount of
renewable energy. The system 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. The batteries are discharged and recharged while remaining
grid-connected.
See the Radian Series Inverter/Charger Operator’s Manual for additional information on these modes,
including the reasons and considerations for using each mode.
Renewable Energy
The Radian Series Inverter/Charger cannot connect directly to photovoltaic arrays, wind turbines,
or other renewable sources. As a required part of a Grid/Hybrid system, the batteries are the inverter’s
primary source of power. However, if the renewable sources are used to charge the batteries, the
inverter can use their energy by drawing it from the batteries.
The renewable source is always treated as a battery charger, even if all of its power is used
immediately. The renewable source must have a charge controller or some way 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 mechanical and electrical connections for up to two FLEXmax charge
controllers. It can receive the electrical connections for two FLEXmax Extreme charge controllers.

Planning
900-0160-01-00 Rev A 7
Battery Bank
When planning a battery bank, consider the following:
Cables: Recommendations for battery cable size and length are shown on page 20. The maximum length
will determine the placement of the battery bank. Other local codes or regulations may apply and may take
priority over OutBack recommendations.
Battery Type: The Radian inverter/charger uses a three-stage charge cycle.
~The cycle was designed for lead-chemistry batteries intended for deep discharge. These include
batteries for marine, golf-cart, and forklift applications. They also include gel-cell batteries and
absorbed glass-mat (AGM) batteries. OutBack Power recommends the use of batteries designed
specifically for renewable energy applications. Automotive batteries are strongly discouraged and will
have a short life if used in inverter applications.
~Each stage of the charging cycle can be reconfigured or omitted from the cycle if necessary.
This programming is performed using the system display. The charger can be customized to charge a
wide range of battery technologies including nickel, lithium-ion, and sodium-sulfur batteries.
~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.
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 on the next page. 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 Technologies 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.
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 vapors which are corrosive over long periods of time. Installing the
inverter in the battery compartment may cause corrosion which is not covered by the
product warranty. (Sealed batteries may be an exception.)
Any losses are essentially amp-hour
capacity that the sy
stem cannot use.
The battery bank size can be
increased to account for losses.
These are the most basic
and essential factors used
to determine bank size.

Planning
8 900-0160-01-00 Rev A
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 amp-hours, is not usually a fixed number.
It is specified based on the rate of discharge.
For example, the OutBack EnergyCell 200RE is
rated at 154.7 Ahr when discharged at the
5-hour rate (to terminal voltage 1.85 Vpc). This is a high rate of discharge that would hypothetically
drain the battery in 5 hours. The same battery is rated at 215.8 Ahr when used at the 100-hour rate.
Use the appropriate discharge rate (correlated to the expected loads) to measure the capacity of a
battery. Use battery specifications for terminal voltage 1.85 Vpc whenever possible.
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.
To Calculate Minimum Battery Bank Size (refer to Table 2 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 x 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 1result by the system voltage
(item G).
3. Determine the daily load consumption in ampere-hours (amp-hours, or Ahr). Multiply the step 2
result by the daily usage hours (item B).
4. Adjust the total for required days of autonomy (the days the system must operate without
recharging) and the maximum DoD. Multiply the step 3result by C and divide by J.
The result is the total amp-hour capacity required for the battery bank.
5. Determine the number of parallel battery strings required. Divide the Ahr figure from step 4by the
individual battery capacity (I). Round the result to the next highest whole number.
6. Determine the total number of batteries required. Divide the system voltage by the battery voltage
(G ÷ H). Multiply the result by the step 5result.
The result is the total required quantity of the chosen battery model.
EXAMPLE #1
A. Backup loads: 1.0 kW (1000 W)
B. Hours of use: 8
C. Days of autonomy: 1
D. Grid-interactive system (GS4048A inverter)
E. Conductor efficiency: 98% (0.98)
F. Inverter efficiency: 93% (0.93)
G. System voltage: 48 Vdc
H. Batteries: OutBack EnergyCell 220GH (12 Vdc)
I. Capacity at 8-hour rate: 199.8 Ahr
J. Maximum DoD: 80% (0.8)
1) A ÷ [E x F] 1000 ÷ (0.98 x 0.93) = 1097.2 W
2) 1÷ G 1097.2 ÷ 48 = 22.9 Adc
3) 2x B 22.9 x 8 = 182.9 Ahr
4) [3x C] ÷ J [182.9 x 1] ÷ 0.8 = 228.6 Ahr
5) 4÷ I 228.6 ÷ 199.8 = 1.14 (rounded to 2)
6) [G ÷ H] x 5[48 ÷ 12] x 2 strings = 8 batteries
Table 2 Battery Bank Elements
Item
Source of information
A. Load Size
Site-specific
B. Daily Hours
Site-specific
C. Days of Autonomy
Site-specific
D. Application
Site-specific
E. Conductor Efficiency
Site-specific
F. Inverter Efficiency
Inverter manufacturer
G. System Vdc
Inverter manufacturer
H. Battery Vdc
Battery manufacturer
I. Capacity
Battery manufacturer
J. Maximum DoD
Battery manufacturer

Planning
900-0160-01-00 Rev A 9
EXAMPLE #2
A. Backup loads: 1.75 kW (1750 W)
B. Hours of use: 8
C. Days of autonomy: 2
D. Off-grid system (GS4048A inverter)
E. Conductor efficiency: 97% (0.97)
F. Inverter efficiency: 93% (0.93)
G. System voltage: 48 Vdc
H. Batteries: OutBack EnergyCell 200RE (12 Vdc)
I. Capacity at 8-hour rate: 167.5 Ahr
J. Maximum DoD: 50% (0.5)
Generator
These Radian models can work with any “split-phase” generator that delivers reliable AC power at the
appropriate voltage and frequency. They cannot work with a single-phase or three-phase generator.
The Radian 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 programmed using 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.
Generator Sizing
A generator should be sized to provide enough power for all the loads and the battery charger.
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.
The generator must be able to provide current to all inverters. Minimum generator wattage1is usually
recommended to be 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.
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. Installations in North
America are expected to bond the neutral and ground at the main electrical panel. See page 22 for more
information on neutral-ground bonding.
1This is the wattage value after deratings for the following: peak versus continuous power, load power factor considerations,
fuel type, altitude, and ambient temperature.
CAUTION: Equipment Damage
Use of a three-phase generator with this equipment may damage either the inverter or
the generator. This damage to the inverter is not covered by the product warranty.
1) A ÷ [E x F] 1750 ÷ (0.97 x 0.93) = 1939.9 W
2) 1÷ G 1939.9 ÷ 48 = 40.4 Adc
3) 2x B 40.4 x 8 = 323.3 Ahr
4) [3x C] ÷ J [323.3 x 2] ÷ 0.5 = 1293.3 Ahr
5) 4÷ I 1293.3 ÷ 167.5 = 7.7 (rounded to 8)
6) [G ÷ H] x 5[48 ÷ 12] x 8 strings = 32 batteries

Planning
10 900-0160-01-00 Rev A
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. This can minimize disruption to the system and avoids the need for extensive rewiring.
Figure 4 Bypass Switching
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.
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

900-0160-01-00 Rev A 11
Installation
Location and Environmental Requirements
Radian Series Inverter/Chargers must be located in a weather-proof enclosure or enclosed area. It is
not designed for exposure to water or excessive wind-blown dust and debris. It carries an Ingress
Protection (IP) rating of 20 and a Relative Humidity (RH) rating of 93%.
The Radian inverter must be wall-mounted in an upright position. The inverter is not approved for
mounting in any other position or orientation.
Recommended minimum clearance is 2 to 4 inches (5 to 10 cm) for the front and top of the inverter.
The sides and bottom may be enclosed or obscured with no restriction when mounting accessory devices or
one other Radian inverter. If more than two Radian inverters are installed side by side with the GSLC, the
inverters should be separated by at least 0.9 inches (2.3 cm) to accommodate the GSLC hinged doors.
The Radian inverter will function best if operated in a temperature range of -4°F to 77°F (–20°C to 25°C). At
temperatures up to 122°F (50°C), all inverter components meet their specifications, but the inverter’s power
is derated. It can function in environments as cold as –40°F (–40°C) and as warm as 140°F (60°C), but it may
not meet all component specifications. This temperature range also applies to storage.
The specifications are listed in the Radian Series Inverter/Charger Operator’s Manual.
Dimensions
Figure 6 Dimensions
Enclosure Height 28” (71.1 cm)
Mounting Hole Spacing 1.97" (5.0 cm)
Enclosure
Height with
Flange
29.1” (74 cm)
Width 16” (40.6 cm)
Depth
8.75"
(22 cm)
The dimensions of an assembled system with mounting plate and GSLC are shown on the next page.

Installation
12 900-0160-01-00 Rev A
Figure 7 System Dimensions
Width 16.0” (40.6 cm)
0.45” (1.1 cm)
0.45” (1.1 cm)
13.7”
(34.8 cm)
28”
(71.1 cm )
29.0”
(73.7 cm)
12.5”
(31.8 cm)
45.0”
(114.3 cm)
8.75”
(22.2 cm)
14.0” (35.6 cm)
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
900-0160-01-00 Rev A 13
Tools Required
The following tools may be required for this installation:
Wrench and socket sets; should include torque and ratchet
wrenches; also reversible (stubby) wrenches for narrow access
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.
The Radian inverter/charger comes equipped with a mounting plate, as shown in Figure 8.
Figure 8 Installing the Mounting Plate
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 is mounted using these
steps.
1. The mounting plate is to be screwed or
bolted directly to a solid mounting surface
such as wall studs. (See Figure 8.) Lag
screws are provided for this purpose.
~The plate is designed to mount on wall
studs with a spacing of 16” (40.6 cm).
If the studs have a different spacing,
plywood or similar material should be
installed over the studs. This material
should be1/2” size or thicker. The
mounting plate can be installed on the
plywood surface.
~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…
16.0” (40.6 cm)
Mounting Plate
8.0” (20.3 cm)
6.0” (15.2 cm
)
4.1”
(10.4 cm)
5.0”
(12.7 cm)

Insulated screwdriver set; should include
a #2 Phillips screwdriver 15 to16” long
Long-nose pliers
DVM or Voltmeter

Installation
14 900-0160-01-00 Rev A
Figure 9 Mounting the Inverter
Radian Inverter
Mounting Plate
x x
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 18.) Grounding other
chassis may involve metal-to-metal contact or separate ground wires.
…continued from the previous page…

Installation
900-0160-01-00 Rev A 15
Component Mounting
Figure 10 Mounting for System Components
For the FLEXmax charge controller:
To fit on the Radian inverter’s right side, the FLEXmax
charge controllers require the FW-CCB or FW-CCB2
mounting brackets. To accommodate many possible
mounting requirements, four sets of mounting holes
have been provided for the brackets.
For the MATE3:
To fit on the
Radian inverter’s
left side, the MATE3 requires
the FW
-MB3 mounting
b
racket. Holes are provided on
the upper and lower left side
to attach the FW
-MB3. For
more information, see the
FW
-MB3 instruction sheet.
For the HUB:
To fit on the
Radian inverter’s left side,
the HUB uses two mounting holes and
three knockouts.
NOTE: The OutBack FLEXmax Extreme should be installed on the wall to either side of the
GSLC for direct wiring access and does not require additional brackets.
The top of the GS Load Center (GSLC) connects to the
bottom of the Radian inverter using four keyhole slots. The
keyhole slots fit over four screws on the bottom of the inverter
that secure the GSLC to the inverter when they are tightened.
(The long screwdriver recommended on page 13 may
be needed to reach these screws.) The GSLC should
be secured to the wall using screws or wall anchors.
The GSLC also makes a mechanical connection to the
Radian using bus bars that bolt to the inverter’s DC
terminals. Other connections are wired as necessary.
Several system components can mount directly onto the Radian
inverter or the GSLC. The MATE3 System Display and the HUB
Communications Manager can easily be mounted on the left side
of the system. Up to two FLEXmax 60 or 80 charge controllers can
be mounted on its right side.
NOTE: The FLEXmax controller requires mounting brackets
(see below). The conduit provided with these brackets is long
enough to wire the FLEXmax directly to the GSLC. Additional
conduit may be necessary when mounting on the inverter. The
image on the right shows GSLC mounting. See Figure 2 on page 4
for other configurations.

Installation
16 900-0160-01-00 Rev A
Removing Front Cover
The front cover must be removed in order to access the Radian inverter’s AC terminals and other
connections. These include the Remote and Batt Temp ports, as well as several sets of auxiliary
terminals.
Twenty-two machine screws are located around the perimeter. Remove these screws with a #2
Phillips screwdriver. Once they are removed, the cover can be lifted off.
NOTE: The screws which secure the plastic plates to the cover do not need to be removed.
Figure 11 Removing the Front Cover
NOTE: The Radian inverter may ship with only a few screws installed to make it easier to perform the
initial installation. The remaining screws are included in the hardware kit.
Cover
Screws
(x22)
Plate
Screws
Plate
Screws

Installation
900-0160-01-00 Rev A 17
Terminals and Ports
Figure 12 DC Terminals, Ribbon Cables, and Auxiliary Terminals
WARNING: Shock Hazard and Equipment Damage
It may be necessary to remove the ribbon cables in the course of servicing the Radian. (This is detailed in
the Radian service manual.) The cables must never be removed until all power has been disconnected from
the Radian for a minimum of one minute. If the cables are removed prematurely, the Radian’s capacitors
will retain a sizable charge, which can cause electrical shock or severe equipment damage during normal
handling. This damage is not covered under the unit’s warranty.
12V AUX:Delivers 12 Vdc up to
0.7
amps (8.4 watts). The output can
be switched on and off for many
functions. See page 26 for details.
SWITCH INV eceives wires for a
manual
on/off switch to control the
inverte
r. See page 25 for instructions.
NOTE:
The ON/OFF INV jumper (J3)
overrides these terminals when installed.
(See above.)
RELAY AUX:Relay contacts with no
voltage (
10 amps at 250 Vac or 30 Vdc).
The relay can be
switched on and off for
many functions. See page 26 for details.
ON/OFF INV JUMPER (J3): Overrides the
SWITCH INV terminals when installed. When
installed, the inverter is ON. The ON or OFF
states can then only be controlled by the MATE3.
NOTE: J3 is installed to the ON position during
manufacture, but the Radian inverter is given an
external OFF command at the same time. Its
initial state will be OFF.
DC TERMINALS Connects to the battery cables and DC system. There are
two DC
positive and two DC negative terminals. Each DC positive terminal
requires separate cables and separate overcurrent protection. See page
20
for instructions.
RIBBON CABLES Connects the Radian’s power
modules and control board. See Warning below.
The functions for each set of AUX contacts can be programmed
using the system di
splay.

Installation
18 900-0160-01-00 Rev A
Figure 13 AC Terminals, Ports, and Ground Bus
WARNING: Shock Hazard
After installation, do not remove the covers while the inverter has any source of power. See the Operator’s
Manual for the shutdown procedure before removing the covers.
AC TERMINAL BLOCK
Receives AC input wires
for two input sources (L1,
L2, and neutral for each).
Also receives AC output
wires (L1, L2, and neutral).
All neutral wires are
electrically common. See
page 22 for instructions.
REMOTE and BATTERY TEMP
PORTS: Receive the RJ45 and
RJ11 plugs from the MATE3
system display and Remote
Temp Sensor. See page 25 for
instructions.
CONTROL WIRING TERMINAL
BLOCK
:Receives control wires for a
variety of functions
, including
ge
nerator control. See facing page for
terminal descriptions.
GROUND BUS
Receives ground wires
from multiple
locations. See page 19
for instructions.