OutBack Power Technologies FXR 2012A, FXR 2524A, FXR 3048A, VFXR 2812A, 3524A, 3648A inverter/charger Installation Manual

FXR Series Inverter/Charger
FXR2012A
FXR2524A
FXR3048A
VFXR2812A
VFXR3524A
VFXR3648A
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.
Applicability
These instructions apply to OutBack inverter/charger models FXR2012A, FXR2524A, FXR3048A, VFXR2812A,
VFXR3524A, and VFXR3648A only.
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:
[email protected]
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
FXR Series Inverter/Charger Installation Manual © 2015 by OutBack Power Technologies. All Rights Reserved.
Trademarks
OutBack Power, the OutBack Power logo, FLEXpower ONE, Grid/Hybrid, and OPTICS RE 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
September 2015, Revision B
Part Number
900-0166-01-00 Rev B
Table of Contents
Introduction ................................................................................................. 5 Audience ................................................................................................................................................................................. 5 Welcome to OutBack Power Technologies ................................................................................................................. 5 Models ...................................................................................................................................................................................... 6 Inverter Model Names .................................................................................................................................................................... 6 Components and Accessories ..................................................................................................................................................... 6 Planning ...................................................................................................... 9 Applications ........................................................................................................................................................................... 9 Input Modes .....................................................................................................................................................................................10 Renewable Energy .........................................................................................................................................................................10 Battery Bank .....................................................................................................................................................................................11 Generator ..........................................................................................................................................................................................13 Installation ................................................................................................. 15 Location and Environmental Requirements............................................................................................................ 15 Tools Required.................................................................................................................................................................... 15 Mounting.............................................................................................................................................................................. 16 Dimensions .......................................................................................................................................................................... 16 Terminals and Ports .......................................................................................................................................................... 17 Wiring .................................................................................................................................................................................... 18 Grounding ........................................................................................................................................................................................18 DC Wiring ............................................................................................................................................................................. 20 AC Wiring.............................................................................................................................................................................. 23 AC Sources........................................................................................................................................................................................24 ON and OFF Wiring ........................................................................................................................................................... 25 Accessory Wiring ............................................................................................................................................................................25 AUX Wiring .......................................................................................................................................................................... 26 Generator Control ..........................................................................................................................................................................27 AC Configurations ............................................................................................................................................................. 29 Single-Inverter.................................................................................................................................................................................29 Multiple-Inverter AC Installations (Stacking) ........................................................................................................................30 Stacking Configurations ..............................................................................................................................................................31 Commissioning .......................................................................................... 41 Functional Test ................................................................................................................................................................... 41 Pre-startup Procedures ................................................................................................................................................................41 Startup ...............................................................................................................................................................................................41 Powering Down ..............................................................................................................................................................................43 Adding New Devices.....................................................................................................................................................................43 'JSNXBSF6QEBUFT............................................................................................................................................................. 44 Operation ............................................................................................................................................................................. 44 Definitions............................................................................................................................................................................ 45 Symbols Used ..................................................................................................................................................................... 46 Index ......................................................................................................... 47 900-0166-01-00 Rev B
3
Table of Contents
List of Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Models ................................................................................................................................................................. 6
Components and Accessories .................................................................................................................... 6
Battery Bank Elements.................................................................................................................................12
Ground Conductor Size and Torque Requirements .........................................................................18
DC Conductor Size and Torque Requirements...................................................................................20
Terms and Definitions .................................................................................................................................45
List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31
Figure 32
4
FXR Series Inverter/Charger ........................................................................................................................ 5
Components ..................................................................................................................................................... 7
Applications (Example) ................................................................................................................................. 9
Dimensions ......................................................................................................................................................16
Terminals, Ports, and Features..................................................................................................................17
DC Ground Lug ..............................................................................................................................................19
Chassis Ground/PE ........................................................................................................................................19
Required Order of Battery Cable Hardware .........................................................................................21
Battery Terminal Covers ..............................................................................................................................21
DC Cover Attachment ..................................................................................................................................22
Turbo Fan Wiring ...........................................................................................................................................22
AC Terminals ...................................................................................................................................................23
AC Sources .......................................................................................................................................................24
AC Sources and Transfer Relay .................................................................................................................24
ON/OFF Jumper and Connections ..........................................................................................................25
Accessory Connections ...............................................................................................................................25
AUX Connections for Vent Fan (Example) ............................................................................................26
AUX Connections for Diversion (Example)...........................................................................................26
Two-Wire Generator Start (Example) .....................................................................................................27
Three-Wire Generator Start (Example) ..................................................................................................28
Single-Inverter Wiring..................................................................................................................................29
OutBack HUB10.3 and MATE3 ..................................................................................................................30
Example of Series Stacking Arrangement ............................................................................................31
Series Wiring (Two Inverters) ....................................................................................................................32
Example of Parallel Stacking Arrangement (Three Inverters) .......................................................33
Parallel Wiring (Four Inverters) .................................................................................................................34
Example of Series/Parallel Stacking Arrangement (Four Inverters) ............................................35
Series/Parallel Wiring ...................................................................................................................................36
Example of Three-Phase Stacking Arrangement (Three Inverters) .............................................37
Example of Three-Phase Stacking Arrangement (Nine Inverters) ...............................................37
Three-Phase Wiring (Three Inverters) ....................................................................................................39
AC Terminals ...................................................................................................................................................42 900-0166-01-00 Rev B
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 FXR 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.

12-, 24-, and 48-volt models

Output power from 2.0 kVA to 3.6 kVA

Designed to be integrated as part of an OutBack Grid/Hybrid™
system using FLEXware™ components

Battery-to-AC inverting with single-phase adjustable output for
such standards as 120 Vac, 100 Vac, or 127 Vac (at 60 or 50 Hz)

AC-to-battery charging (FXR systems are battery-based)

Uses battery energy stored from renewable resources
~
Can utilize stored energy from PV arrays, wind turbines, etc.
~
OutBack FLEXmax charge controllers will optimize PV output

Inverter load support for a small AC source

Sell-back to utility (grid-interactive function)
~
Available in 24- and 48-volt models

Rapid transfer between AC source and inverter output with minimal delay time

Uses the MATE3™ System Display and Controller or the AXS Port™ SunSpec Modbus Interface (sold
separately) for user interface as part of a Grid/Hybrid system

Supports the OPTICS RE™ online tool1 for a cloud-based remote monitoring and control application


Requires the MATE3 or the AXS Port

Visit www.outbackpower.com to download
Uses the HUB10.3™ Communications Manager for stacking as part of a Grid/Hybrid system
~

Stackable in series, parallel, series/parallel, and three-phase configurations
Listed to UL 1741 (2nd Edition) and CSA 22.2 by ETL
Figure 1
FXR Series Inverter/Charger
NOTE: This product has a settable AC output range. In this manual, many references to the output refer
to the entire range. However, some references are made to 120 Vac or 60 Hz output. These are intended
as examples only.
1
Outback Power Technologies Intuitive Control System for Renewable Energy
900-0166-01-00 Rev B
5
Introduction
Models
Vented FXR (VFXR) models are intended for indoor or protected installation only. Vented inverters
have an internal fan and use outside air for cooling. On average, the power of the vented models is
rated higher than sealed models due to their greater cooling capabilities.
Sealed FXR models are designed for harsher environments and can survive casual exposure to the
elements. However, enclosed protection is still recommended. (See page 15.) Sealed inverters
have an internal fan, but do not use outside air for cooling. To compensate, sealed models are also
equipped with the OutBack Turbo Fan assembly, using external air to remove heat from the chassis.
(Vented models are not equipped with the Turbo Fan and cannot use it.)
Table 1
Model
Type
Power
Models
Battery
Application
FXR2012A
Sealed
2.0 kVA
12 Vdc
Off-grid, backup
VFXR2812A
Vented
2.8 kVA
12 Vdc
Off-grid, backup
FXR2524A
Sealed
2.5 kVA
24 Vdc
Off-grid, backup, grid-interactive
VFXR3524A
Vented
3.5 kVA
24 Vdc
Off-grid, backup, grid-interactive
FXR3048A
Sealed
3.0 kVA
48 Vdc
Off-grid, backup, grid-interactive
VFXR3648A
Vented
3.6 kVA
48 Vdc
Off-grid, backup, grid-interactive
Inverter Model Names
FXR series model numbers use the following naming conventions.

The model number includes “FXR” as the inverter series. “R” indicates that the FXR was designed for
renewable applications. Off-grid and grid-interactive functions are integrated in the same inverter.

Vented models are preceded with “V”, as in “VFXR3648A”. If a model number does not begin with “V”, it is a
sealed model and is equipped with a Turbo Fan. This is not indicated otherwise.

The first two digits show the power of that model. For example, “FXR2012A” is 2000 watts.

The second pair of digits shows the inverter’s nominal DC voltage. For example, “FXR2524A” is 24 volts.

The model number is followed by “A”. This designates the inverter’s output as nominally 120 Vac (used in
North America, Latin America, Asia, and other regions).
Components and Accessories
Table 2
Components and Accessories
Components to be Installed
Accessories Included
Battery Terminal Cover, red
FXR Inverter/Charger Installation Manual (this book)
Battery Terminal Cover, black
FXR Inverter/Charger Operator’s Manual
AC Plate
“WARNING ELECTRICAL SHOCK” sticker
DC Cover (DCC) or Turbo Fan
Silicone Grease Packet
Remote Temperature Sensor (RTS)
6
900-0166-01-00 Rev B
Introduction
DCC (DC Cover)
This covers the DC terminal area on vented inverters. The
DCC provides space to mount other components such as a
DC current shunt.
AC Plate
This plate is used for installations which do not utilize OutBack’s
optional FLEXware conduit boxes. The knockouts are used to
install strain relief for flexible cable.
NOTE: This plate is not to be connected to conduit.
Battery Terminal Cover
These protect the terminals from accidental contact. They are
made of stiff plastic with a snap-on design.
Always keep covers installed during normal operation.
Turbo Fan Cover
Included in place of the DCC on sealed inverters. Convectively cools
chassis with the external OutBack Turbo Fan to allow maximum power.
NOTE: Do not install the Turbo Fan on a vented inverter.
NOTE: The DC Cover or Turbo Fan does not replace the battery terminal
covers. These covers must be installed in addition to the DCC or fan.
Figure 2
900-0166-01-00 Rev B
Components
7
Introduction
NOTES:
8
900-0166-01-00 Rev B
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 in turn is used
by the inverter.
FXR series inverters have been designed to work with all types of renewable systems. These include
off-grid, backup, and grid-interactive applications. The inverter’s settings can be changed to
accommodate many applications. Changes are made with the system display.
The FXR inverter has one set of terminals for a single AC source. However, it can use two different AC
sources when an external transfer switch is installed. The inverter can be independently programmed
for each source. It is common to use utility grid power and a gas or diesel generator. Other
combinations of AC sources are possible.
Utility Grid
PV Array
AC IN
DC IN
OR
AC OUT
Charge
Controller
AC Generator
AC IN
Battery Charging
AC or PV
PV Harvest
Battery Bank
Loads
AC OUT
DC OUT
Load Support
Figure 3
Applications (Example)
In Figure 3, the inverter uses a bidirectional AC input to sell power back to the utility grid. The power
being delivered to the grid (labeled “AC Out”) is excess AC power not being used by the AC loads.
Selling requires an inverter/charger with Grid Tied mode available and active.
900-0166-01-00 Rev B
9
Planning
Input Modes
The FXR inverter has many modes of operation. See the FXR 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 inverter’s input selections can be
set to a different operating mode to support different applications.

Generator: This mode is intended for a wide range of AC sources, including generators with a rough or
imperfect AC waveform. The inverter can use generator power 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 inverter adds renewable or
battery power to the AC source to ensure that the loads receive the power they require. This mode can
reduce peak load demand from the utility.

Grid Tied: This mode is intended for grid-interactive systems. When renewable energy sources charge the
batteries above a selected “target” voltage, the inverter will send the excess energy to any loads. If the loads
do not use all the excess energy, then the inverter will send (sell) that energy to the utility grid.

NOTE: This mode is only available in 24-volt and 48-volt models.

UPS: This mode is intended for systems primarily intended to maintain power to the loads with minimal
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 inverter to
power the loads unless power is lost. If power is lost, then the 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 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.

Grid Zero: 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 restrict the grid use except
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 (from renewable
sources) while remaining grid-connected. This mode does not allow the inverter to charge batteries or sell.
Programming
Selection of the input modes and all other inverter programming are performed using a system
display such as the MATE3. The system display can customize a wide range of parameters.
Renewable Energy
The inverter cannot connect directly to PV, wind turbines, or other renewable sources. 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 other regulation method,
to prevent overcharging. OutBack Power’s FLEXmax family of charge controllers can be used for this
purpose, as can other products.
10
900-0166-01-00 Rev B
Planning
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. Local codes or regulations may apply and may take
priority over OutBack recommendations.

Battery Type: The FXR 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.
~
Using OutBack’s Advanced Battery Charging (ABC), most charging stages can be reconfigured or
omitted from the cycle if necessary. The charger can be customized to charge a wide range of battery
technologies including nickel, lithium-ion, and sodium-sulfur batteries. This programming is performed
using the system display.

Nominal Voltage: These inverters are designed to work with specific battery bank voltages, which are
different depending on inverter model. Before constructing a battery bank, check the inverter model and
confirm nominal battery voltage.

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 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.)

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 3 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:
These are the most basic
and essential factors used
to determine bank size.
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.
F.
Conductor efficiency: Wire size and other factors
will waste power due to resistance and voltage drop.
Typical acceptable efficiency is 96 to 99%.
Inverter efficiency: FXR specifications list “Typical
Efficiency” to help estimate operating loss.
900-0166-01-00 Rev B
Any losses are essentially amp-hour
capacity that the system cannot use.
The battery bank size can be
increased to account for losses.
11
Planning
G. System DC voltage: Each inverter model
requires a specific DC voltage to operate.
H. Battery voltage: Most individual battery
voltages are less than the system DC voltage.
The batteries may need to be placed in series to
deliver the correct voltage.
I.
Table 3
Battery Bank Elements
Item
A. Load Size
B. Daily Hours
C. Days of Autonomy
D. Application
E. Conductor Efficiency
F. Inverter Efficiency
G. System Vdc
H. Battery Vdc
I. Capacity
J. Maximum DoD
Source of information
Site-specific
Site-specific
Site-specific
Site-specific
Site-specific
Inverter manufacturer
Inverter manufacturer
Battery manufacturer
Battery manufacturer
Battery manufacturer
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.
NOTE: 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.
To Calculate Minimum Battery Bank Size (refer to Table 3 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 1 result 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 3 result 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 4 by 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 5 result.
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 (FXR3048A inverter)
1) A ÷ [E x F]
1000 ÷ (0.98 x 0.93) = 1097.2 W
2) 1 ÷ G
1097.2 ÷ 48 = 22.9 Adc
3) 2 x B
22.9 x 8 = 182.9 Ahr
E.
Conductor efficiency: 98% (0.98)
4) [3 x C] ÷ J
[182.9 x 1] ÷ 0.8 = 228.6 Ahr
F.
Inverter efficiency: 93% (0.93)
5) 4 ÷ I
228.6 ÷ 199.8 = 1.14 (rounded to 2)
6) [G ÷ H] x 5
[48 ÷ 12] x 2 strings = 8 batteries
G. System voltage: 48 Vdc
H. Batteries: OutBack EnergyCell 220GH (12 Vdc)
12
I.
Capacity at 8-hour rate: 199.8 Ahr
J.
Maximum DoD: 80% (0.8)
900-0166-01-00 Rev B
Planning
EXAMPLE #2
A. Backup loads: 720 W
B.
Hours of use: 3
C.
Days of autonomy: 2
D. Off-grid system (VFXR3524A inverter)
1) A ÷ [E x F]
720 ÷ (0.97 x 0.9) = 801.8 W
2) 1 ÷ G
824.7 ÷ 24 = 34.4 Adc
3) 2 x B
34.4 x 3 = 103.1 Ahr
E.
Conductor efficiency: 97% (0.97)
4) [3 x C] ÷ J
[103.1 x 2] ÷ 0.5 = 412.4 Ahr
F.
Inverter efficiency: 92% (0.9)
5) 4 ÷ I
412.4 ÷ 167.5 = 2.5 (rounded to 3)
6) [G ÷ H] x 5
[24 ÷ 12] x 3 strings = 6 batteries
G. System voltage: 24 Vdc
H. Batteries: OutBack EnergyCell 200RE (12 Vdc)
I.
Capacity at 8-hour rate: 167.5 Ahr
J.
Maximum DoD: 50% (0.5)
Generator

FXR inverters can accept power from a single-phase generator that delivers clean AC power in the range of
voltage and frequency specified for that model.
~
Inverters stacked for split-phase output (120/240 Vac) can work with both output lines of a
split-phase generator.
~
Inverters stacked for three-phase output can work with three-phase generators.

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 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.
 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 18 for more
information on neutral-ground bonding.
Generator Sizing
A generator should be sized to provide enough power for all the loads and the battery charger.
The generator size should assume maximum loads and maximum charging at the same time.

Available generator power may be limited by ratings for circuit breakers and/or generator connectors.

The generator must be able to provide current to all inverters on a given phase or output. Minimum
generator size2 is usually recommended to be twice the power of the inverter system. For example, a 2 kVA
inverter should have a 4 kVA generator. 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.

In addition, if a split-phase 120/240 Vac generator is powering a single-phase 120 Vac inverter system with
no other compensation, it is required to be at least twice the power of the inverters. A split-phase
generator that is heavily loaded on one output line may suffer severely from balancing issues. The OutBack
FW-X240 or PSX-240 balancing transformers may compensate for this condition.
2
This is the generator size after derating for environment, use, and other factors.
900-0166-01-00 Rev B
13
Planning
NOTES:
14
900-0166-01-00 Rev B
Installation
Location and Environmental Requirements
Sealed (FXR) models are resistant to water and other elements but are not designed for permanent
outdoor installations. If outdoor installation is required, the FXR inverter must be installed under
cover and protected from direct exposure to the environment. Vented (VFXR) models are not resistant
to water and other elements. They must be installed indoors.

The inverter can often be mounted in any position or orientation. If there is any exposure to moisture or
condensation, the inverter must not be mounted upside-down. This ensures that water will not accumulate
under the DC cover. However, it can still be mounted in other positions or orientations.

For installations where the inverter may be exposed to water spray, a sealed model must be used and
mounted either with the base down (shelf mounting) or with the AC wiring compartment facing down
(wall mounting). If mounted with the base down, water cannot be allowed to accumulate around the
inverter’s base. There is a drainage system on the base of the inverter to dispel condensation. If submerged,
water can enter this drain and cause failure.

Vented inverters must be installed in a weather-proof enclosure or enclosed area. These models are not
designed for exposure to water or excessive wind-blown dust and debris.

When inverters are installed with an OutBack FLEXpower system, the system must be installed in the upright
orientation due to the requirements of the circuit breakers.

Any inverter will perform more efficiently in locations offering plenty of air circulation. The recommended
minimum clearance is 2 inches (5 cm) on all sides of the inverter.

Any inverter will function to all of its specifications if operated in a range of –4°F to 122°F (–20°C to 50°C).

The inverter will function, but will not necessarily meet its specifications, if operated in a temperature range
of –40°F to 140°F (–40°C to 60°C). This is also the allowable temperature range for storage.

The FXR series of inverters carry an Ingress Protection (IP) rating of 20 and a Relative Humidity (RH) rating of
93% (non-condensing).

Inverter specifications are listed in the FXR Series Inverter/Charger Operator’s Manual.
Tools Required

Wire cutters/strippers

Torque wrenches

Assorted insulated screwdrivers

DVM or standard voltmeter
900-0166-01-00 Rev B
15
Installation
Mounting

One person can install the FXR inverter, but installation may be easier with two people.

The unit has four mounting holes, one in each corner. Use fasteners in all corners for a secure installation.
IMPORTANT:
Use correct fasteners to secure the inverter to the mounting surface,
regardless of the type of surface. OutBack cannot be responsible for
damage to the product if it is attached with inadequate fasteners.

Due to the variance in other mounting methods, OutBack only endorses the use of FLEXware mounting
products or previous versions of OutBack mounting plates. Use M6 x 20 mm machine screws, one per
corner, to attach the inverter to the mounting plate. Follow the instructions with each mounting system.

Mount and secure each component before attaching any wiring.

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.
If using an OutBack FLEXware Mounting Plate, avoid large air gaps behind the plate. These can result
in louder mechanical noise during heavy inverting or charging. Mount the plate on a flat, solid
mounting surface.
Dimensions
Height
without
Turbo
12” (30.5 cm)
Length 16.25” (41 cm)
Width
8.25” (21 cm)
Height
with Turbo
13” (33 cm)
Figure 4
16
Dimensions
900-0166-01-00 Rev B
Installation
Terminals and Ports
DC and AC
GROUND TERMINALS
DC TERMINALS
These terminals connect to the
battery cables and the DC system.
See page 20 for instructions.
These terminals connect to
a grounding system for
both batteries and AC. See
page 18 for instructions.
CONTROL WIRING TERMINAL BLOCK
These terminals receive control wires for a
variety of functions including generator control.
See pages 26 and 27 for instructions and the
Operator’s Manual for more information.
AC TERMINAL BLOCK
These terminals receive AC
input and output wires. See
page 23 for instructions.
The Terminal Block can be unplugged from the
AC board for convenience. While installed, keep
screws tight and the block itself secured tightly
to the AC board to prevent malfunction.
XCT+/XCTNon-operational terminals.
Do not connect anything
to them.
INVERTER ON/OFF
These terminals receive wires for a manual on/off
switch to control the inverter.
MATE/HUB and RTS PORTS
ON/OFF JUMPER
These ports receive the RJ45
and RJ11 plugs from the
system display and Remote
Temp Sensor. See page 25
for instructions.
The jumper alongside these terminals overrides
them and turns the inverter on. (See page 25 for
instructions.) With the jumper installed, a switch
cannot turn the inverter off, but the system
display can turn it off or on. The system display
cannot turn it on if the jumper is not installed.
The ports are mounted
sideways. When viewed
from the left side, they
appear as shown below.
AUX OUTPUT (AUX+/AUX-)
These terminals deliver 12 Vdc up to 0.7 amps
(8.4 watts). The output can be switched on and
off for many functions. The default function is to
drive a cooling fan or the Turbo Fan.
See page 26 for details.
The functions for the AUX output can be
programmed using the system display.
AUX LED INDICATOR
Orange LED indicator turns on when
12 Vdc output is present.
LED INDICATORS
These indicators display the inverter status and battery voltage.
Figure 5

The three BATTERY LED indicators (green, yellow, and red) are based on
DC voltage, and provide a very general idea of battery state.

The green INVERTER LED indicator shows if the inverting function is on.

The yellow AC IN LED indicator shows if an AC source is present.

The red ERROR LED indicator shows either a Warning or an Error. A
Warning is an alert for a problem that is not severe enough for
shutdown. An Error usually accompanies inverter shutdown.
Terminals, Ports, and Features
NOTE: The INVERTER ON/OFF Jumper is installed to the ON position during manufacture, but the FXR
inverter is given an external OFF command at the same time. Its initial state is OFF.
900-0166-01-00 Rev B
17
Installation
Wiring
It will be necessary to remove knockouts from the AC Plate to run wires. The AC Plate has one
knockout of ½” size and two knockouts of ¾” size. Install appropriate bushings to protect the wires.
Use copper wire only. Wire must be rated at 75°C or higher.
Grounding
WARNING: Shock Hazard

This unit meets the IEC requirements of Protection Class I.

The unit must be connected to a permanent wiring system that is grounded
according to the IEC 60364 TN standard.

The input and output circuits are isolated from ground. The installer is responsible for
system grounding according to all applicable codes.

For safety, the neutral and ground conductors should be mechanically bonded.
OutBack does not bond these conductors within the inverter. Some codes require
the bond to be made at the main panel only. Make sure that no more than one bond
is present in the AC system at any time.
WARNING: Shock Hazard
For all installations, the negative battery conductor should be bonded to the grounding
system at only one point. If the OutBack GFDI is present, it can provide the bond.
IMPORTANT:
Not all OutBack products can be used in a positive-ground system. If it is necessary to
build a positive-ground system with OutBack products, contact OutBack Technical
Support at +1.360.618.4363 before proceeding. Additionally, consult the online forum
at www.outbackpower.com/forum/, where this subject has been discussed extensively.
Table 4
Terminal Location
Ground Conductor Size and Torque Requirements
Minimum Conductor Size
Torque Requirements
Central AC Terminals
#10 AWG (0.009 in2) or 6 mm2
25 in-lb (2.8 Nm)
DC Box Lug
#6 AWG (0.025 in2) or 16 mm2
45 in-lb (5.1 Nm)
Table 4 contains OutBack’s recommendations for minimum safe cable sizes. Other codes may
supersede OutBack’s recommendations. Consult applicable codes for final size requirements.
18
900-0166-01-00 Rev B
Installation
The inverter’s DC ground is a box lug located next to the negative DC battery terminal. This lug
accepts up to 1/0 AWG (70 mm2 or 0.109 in2) wire. Local codes or regulations may require the DC
ground to be run separately from the AC ground. Also, if present, it will be necessary to remove the
DC Cover or Turbo Fan before making the ground connection. (See page 22.)
Box Lug
Figure 6
DC Ground Lug
CHASSIS GROUND/PE
The two CHASSIS GROUND/PE terminals
are electrically common. If connecting to an
external ground bus, only one terminal needs
to be used. The other terminal may be used if
connecting to a device with its own ground
wire, such as a generator.
Figure 7
900-0166-01-00 Rev B
Chassis Ground/PE
19
Installation
DC Wiring
WARNING: Shock Hazard
Use caution when working in the vicinity of the inverter’s battery terminals.
CAUTION: Equipment Damage
Never reverse the polarity of the battery cables. Always ensure correct polarity.
CAUTION: Fire Hazard


The installer is responsible for providing overcurrent protection. Install a
circuit breaker or overcurrent device on each DC positive (+) conductor to
protect the DC system.
Never install extra washers or hardware between the mounting surface
and the battery cable lug. The decreased surface area can build up heat.
See the hardware diagram on page 21.
IMPORTANT:


The DC terminals must be encased in an enclosure to meet the requirements
of some local or national codes.
Table 5 contains OutBack’s recommendations for minimum safe cable sizes.
Other codes may supersede OutBack’s recommendations. Consult applicable
codes for final size requirements.
Table 5
DC Conductor Size and Torque Requirements
Inverter
Nominal DC Amps
Conductor Size3
Breaker Size
(Wattage/Voltage)
(Derated 125%)
(Minimum)
(Minimum)
FXR2012A
200
4/0 AWG (120 mm2) or 0.186 in2
250 Adc
VFXR2812A
280
4/0 AWG (120 mm2) or 0.186 in2
250 Adc
FXR2524A
125
2/0 AWG (70 mm2) or 0.109 in2
175 Adc
VFXR3524A
175
4/0 AWG (120 mm2) or 0.186 in2
250 Adc
FXR3048A
75
1/0 AWG (70 mm2) or 0.109 in2
125 Adc
VFXR3648A
90
1/0 AWG (70 mm2) or 0.109 in2
125 Adc
Terminal Location
Torque Requirements
Inverter DC Terminals
60 in-lb (6.9 Nm)
Battery Terminals
See battery manufacturer’s recommendations
When installing DC cables:

Battery positive and negative cables should be no longer than 10 feet (3 meters) each, to minimize voltage
loss and other possible effects.

Turn off DC circuit breakers or remove fuses before proceeding.

Tie, tape, or twist cables together to reduce self-inductance. Run positive and negative cables through the
same knockouts and conduit.

The inverter’s battery terminal is a threaded stud which accepts a ring terminal lug. Use crimped and sealed
copper ring lugs with 5/16 inch (0.79 cm) holes, or use compression lugs.

Install all overcurrent devices on the positive cable.
3
Cable sizes are for each inverter in a system. In a system with multiple inverters, each inverter requires its own cables and overcurrent
devices of the size indicated.
20
900-0166-01-00 Rev B
Installation
To install DC cables and hardware:
1. Install all DC cables.
Do not install hardware in a different order from Figure 8. The battery cable lug should be the first
item installed on the stud. It should make solid contact with the mounting surface.
Do not close the main DC disconnect until wiring is complete and the system is prepared for
commissioning.
M8 x 1.25 Stud
13 mm Nut
Lock Washer
Flat Washer
Battery Cable Lug
Mounting Surface
Insulator
Figure 8
Required Order of Battery Cable Hardware
CAUTION: Fire Hazard
Never install extra washers or hardware between the mounting surface and the
battery cable lug. The decreased surface area can build up heat.
2. Install the battery terminal covers. These are made of stiff plastic with a snap-on design.
REMOVAL SLOT
If it is necessary to remove the covers, remove
carefully using a flat screwdriver.
Insert the screwdriver into the slot on the
side of each cover and unsnap the cover.
Figure 9
900-0166-01-00 Rev B
Battery Terminal Covers
21
Installation
DC Cover or Turbo Fan Attachment
COVER ATTACHMENT
FXR inverters are equipped with either the
DC Cover or the Turbo Fan. To attach
either cover, put the cover in place and
insert a screw at each corner using a
Phillips screwdriver.
As part of attaching the Turbo Fan, follow
the wiring instructions in Figure 11.
Figure 10
DC Cover Attachment
TURBO FAN WIRING
Install the wires in the AC Wiring Compartment to
make the Turbo Fan operational. The AUX+ and
AUX– terminals receive the red (+) and black (–)
wires. Tighten with a Phillips screwdriver.
To safely run the wires into the AC compartment,
pass the wires through the notch in the
compartment cover.
Edge of Cover
Notch
If necessary, the green terminal block can be unplugged
by pulling it gently away from the AC board.
Compartment
Make certain the AUX programming is
correct for proper fan operation.
Figure 11
Turbo Fan Wiring
If it is necessary to remove the Turbo Fan:
1. Remove the compartment cover.
2. Unscrew the AUX+ and AUX– terminal screws.
3. Remove the wires.
4. Remove the screws at the four corners of the Turbo Fan.
5. Remove the Turbo Fan.
22
900-0166-01-00 Rev B
Installation
AC Wiring
WARNING: Shock Hazard


The neutral and ground conductors should be mechanically bonded.
Ensure there is no more than one AC neutral-ground bond at any time.
Local or national codes may require the bond to be made at the main panel only.
IMPORTANT:
The AC input and output may need to be protected with branch-rated circuit
breakers of maximum 60 Aac size to meet applicable code requirements.
IMPORTANT:
Applicable codes may prevent grid-interactive inverters from using an input circuit
breaker larger than 40 amps. Confirm local requirements before installation.
IMPORTANT:
This page contains OutBack’s recommendations for minimum safe cable sizes.
Other codes may supersede OutBack’s recommendations. Consult applicable
codes for final size requirements.
All system wiring must comply with national and local codes and regulations.
The FXR inverter’s AC terminal block has six positions for AC wires. The minimum recommended size
is #6 AWG (16 mm2) or 0.021 in2 wire. This is also the largest size that the terminal will accept.
NEUTRAL
The two NEUTRAL
terminals are
electrically common.
AC HOT OUT
The AC HOT OUT
terminal connects to the
output load panel.
If connecting to an
external neutral bus,
only one terminal
needs to be used. An
external neutral bus is
often located in the
main electrical panel.
The terminal can carry
up to 60 amps using the
inverter’s transfer relay.
Use the inverter
power to size the actual
maximum output load.
Size the circuit breakers
accordingly.
Use the other terminal
if connecting to a
device that has its own
neutral wire, such as a
generator.
AC HOT IN
The AC HOT IN terminal brings current from the AC source. It powers both battery
charger and loads. Use the source size to determine actual current draw. Size all
circuit breakers accordingly.
Figure 12
900-0166-01-00 Rev B
AC Terminals
23
Installation
AC Sources
The inverter has a single set of AC terminals which are intended to connect to a single AC source.
It cannot be directly wired to more than one AC source at the same time. If multiple sources are
used, it is usually required to have a selector switch that changes from one to the next. The switch
should be the “break before make” type which disconnects from one source before contacting
another. This prevents the risk of connecting to two out-of-phase sources at the same time or
connecting them to each other.
Utility Grid
Generator
Inverter
GND NEU HOT
NEU HOT (internal connections)
GND NEU HOT
Single-Pole
Double-Throw
Switch
Internal
Transfer Relay
OUTPUT
Loads
NEU
GND
Figure 13
AC Sources
The inverter’s transfer relay is normally set to provide inverter power to the output. This is shown in
Figure 13, where the internal transfer relay is switched to the inverter function.
Utility Grid
Generator
Inverter
GND NEU HOT
NEU HOT (internal connections)
GND NEU HOT
Single-Pole
Double-Throw
Switch
Internal
Transfer Relay
OUTPUT
NEU
Loads
GND
Figure 14
AC Sources and Transfer Relay
When an AC source is connected and accepted, the internal transfer relay switches to transfer the AC
source power to the loads. Figure 14 shows the utility grid switch closed. The internal transfer relay
has switched accordingly so that the loads receive utility power. (See the Operator’s Manual for the
inverter’s acceptance criteria.)
24
900-0166-01-00 Rev B
Installation
ON and OFF Wiring
The INVERTER ON/OFF jumper bridges two pins. The ON/OFF jumper
parallels the two INVERTER ON/OFF terminals on the Control Wiring
Terminal Block. If either connection is closed, the inverter is ON. The
jumper is installed in the factory, but the inverter is given an
external OFF command at the same time. Its initial state will be OFF.
(An inverter in the OFF state will not invert. However, it may still transfer
power to loads and charge batteries from an AC source.)
To turn the inverter initially ON, remove the
jumper briefly and then replace it. This
requires long-nose pliers or a similar tool.
After this, removing the
jumper will immediately
turn the inverter OFF.
Jumper Off
Jumper On
Once the jumper has been removed, the
INVERTER ON/OFF terminals on the Control
Wiring Terminal Block can be used to wire a
manual on/off switch. These terminals can
also be used to control an Emergency Power Off
(EPO) device instead of a standard switch.
Figure 15
ON/OFF Jumper and Connections
Accessory Wiring
The AC Wiring Compartment Board has ports for both
the Remote Temperature Sensor (RTS) and the system
display. The system display port is labeled MATE/HUB.
If a HUB Communications Manager is in use, it occupies
the inverter’s MATE/HUB port.
RTS port
RTS cable
RJ11,
4-conductor,
telephone)
MATE/HUB port
MATE cable
RJ45, 8-conductor,
CAT5 non-crossover
See the
Operator’s
Manual for more
information on
the RTS.
When a HUB product occupies the inverter’s MATE/HUB port,
the system display connects directly to the HUB product.
Inverters plug into ports 1 and above. Charge controllers and
other devices plug into unassigned ports not used by inverters.
Additional ports
MATE
port
Figure 16
900-0166-01-00 Rev B
See Stacking on page 30 for information on connecting
inverters. See the HUB product literature for other devices.
Accessory Connections
25
Installation
AUX Wiring
The AUX+ and AUX– terminals are a switched 12 Vdc supply. The AUX can respond to different
criteria and control many functions. These include cooling fans, vent fans, load diversion, fault alarms,
and the Advanced Generator Start (AGS) function.
The terminals can supply up to 0.7 amps at 12 Vdc (8.4 watts). This is sufficient to drive a small fan or a
relay controlling a larger device. The terminals accept wire up to #14 AWG (2.5 mm2). The AUX circuit
contains electronic overcurrent protection, which resets after being overloaded. No additional fuses
are required for the AUX terminals.
The default setting for the AUX output is to control the Turbo Fan included with sealed models.
(See Figure 17.) The AUX output can only control one function at a time. It cannot be used for
anything else if the Turbo Fan is connected.
The control logic for the AUX output is not always located in the same device. Inverter AUX functions
are located within the inverter itself and are described accordingly. Although inverter-based functions
require the system display for programming, they will function even if the display is removed. However,
AGS programming is located within the system display and will not work if the display is removed. Other
devices may also be able to control the terminals. For generator control, see page 27.
In this example, the AUX directly
drives a 12-volt vent fan. The
+ and – wires on the fan are
connected to the AUX+ and
AUX– terminals.
AUX LED INDICATOR
The AUX indicator
illuminates when the AUX
output becomes active.
Fan
Figure 17
AUX Connections for Vent Fan (Example)
In this example, the AUX output drives a relay that
diverts wind power. The relay’s coil is connected to the
AUX+ and AUX– terminals. When the AUX output closes
the relay (based on battery voltage), the relay diverts the
excess wind power to a water heating element.
Turbine
Relay
NOTE: Relays and elements shown are examples only and may
vary depending on the installation.
Figure 18
26
Element
AUX Connections for Diversion (Example)
900-0166-01-00 Rev B
Installation
Generator Control
The AUX terminals can provide a signal to control an automatic-start generator. The control function
can be Advanced Generator Start (AGS), which is situated in the system display. AGS can start the
generator using settings from the system display, or it can use battery readings from the FLEXnet DC
battery monitor. Alternately, the control function can be Gen Alert, which is a simpler function based
directly in the FXR inverter. The choice of control function depends on system needs and the
capabilities of each device.
The generator must be an electric-start model with automatic choke. It is recommended to have
“two-wire” start capability. A two-wire-start generator is the simplest type, where the cranking and
starting routine is automated. It usually has a single switch with two positions that is turned ON to
start, OFF to stop.
Two-Wire-Start
The 12 Vdc signal provided by the AUX output can be switched on and off to provide a start signal. It
is possible to send a 12-Vdc signal directly to the generator. However, this should never be done if it
connects the AUX output directly to the generator’s own battery. It is more common to use the AUX
terminals to energize the coil of a 12 Vdc automotive or similar relay.
The OutBack FLEXware Relay Assembly depicted in Figure 19 is sold for this purpose. The relay contacts
can serve in place of the generator’s start switch. The battery shown below is depicted for clarity. In
most cases, it is part of the generator’s internal starting circuit and is not an external component.
The drawing below is one example of a possible arrangement. Specific arrangements, relays, and
other elements depend on the requirements of the installation and of the generator.
Relay
Coil
Relay
Contact
Starting
Terminals
1
1
Generator
Battery
Figure 19
900-0166-01-00 Rev B
Two-Wire-Start
Generator
Two-Wire Generator Start (Example)
27
Installation
Three-Wire-Start
A “three-wire-start” generator has two or more starting circuits. It usually has a separate switch or
position for cranking the generator. A three-wire generator has fewer automated functions than a
two-wire. It usually requires multiple controls for starting, running, or stopping. The AUX terminals
cannot control this type of generator without using a three-wire to two-wire conversion kit.
Atkinson Electronics (http://atkinsonelectronics.com) is one company that makes these kits. The
Atkinson GSCM-Mini is intended to work with OutBack inverters.
The drawing below is one example of a possible arrangement. Specific arrangements, relays, and
other elements depend on the requirements of the installation and of the generator.
Atkinson
GSCM-Mini
Three-Wire-Start
Generator
Figure 20
28
Three-Wire Generator Start (Example)
900-0166-01-00 Rev B
Installation
AC Configurations
Single-Inverter
When installing an inverter AC system, the following rules must be observed.

All overcurrent devices must be sized for 60 Aac or less.

All wiring must be sized for 60 Aac or more.

All output circuit breakers must be sized appropriately for loads and inverter power.

The AC input (generator or utility grid) must be a single-phase source of the proper voltage and frequency.
AC Source
(Utility Grid or AC Generator)
LEGEND
Hot
Neutral
Ground
NOTES:
1. Neutral (common) conductor may be
connected from only one inverter
neutral terminal to a common bus bar in
the AC conduit box.
2. Colors depicted here may be different
from wiring standards.
TBB = Terminal Bus Bar
AC Conduit Box
NEU
GND
HOT
MATE3
Input
Circuit
Breaker
CAT5 Cable
AC
Neutral
IN
AC
Hot
IN
HUB/
MATE
Inverter/Charger
AC
Neutral
OUT
AC
Hot
OUT
GROUND
Mechanical
Interlock
Output
Circuit
Breaker
Bypass
Circuit
Breaker
Ground TBB
(may be within AC
Conduit Box)
NEU
Primary
System
Ground
HOT
AC Loads
Figure 21
900-0166-01-00 Rev B
GND
Single-Inverter Wiring
29
Installation
Multiple-Inverter AC Installations (Stacking)
Installing multiple inverters in a single AC system allows larger loads than a single inverter can handle.
This requires stacking. Stacking inverters refers to how they are wired within the system and then
programmed to coordinate activity. Stacking allows all units to work together as a single system.
Examples of stacking configurations include “series”, “parallel”, “series/parallel”, and “three-phase”.
Stacking Connections
Stacking requires an OutBack HUB10.3 communications manager and a system display.
Make all interconnections between the products with CAT5 non-crossover cable.
HUB10.3
Communications
Manager
Additional Ports
Figure 22
Port 1
MATE
MATE3
System
Display
OutBack HUB10.3 and MATE3
Each inverter must be assigned a stacking mode, “master” or “slave”, depending on the configuration.

The master provides the primary output phase. Other inverters in the system base their phase on that of the
master. If the master shuts off, all other inverters also shut off. The master must sense and connect to an AC
source before other inverters can connect.
In a parallel-stacked system, the master tends to be the most heavily used unit.
“Subphase master” inverters are used in series or three-phase systems. A subphase master inverter operates
semi-independently of the master inverter. Although the master inverter sets the phase relationship, the
subphase master creates an output independent of the master.
The master on the L1 (or A phase) output cannot measure loads and voltages on any other output. The
subphase masters for the other outputs perform monitoring and regulation for the phase they control.
~ In a series or series/parallel-stacked system, a subphase master is required for the L2 output.
~ In a three-phase system, subphase masters are required for both the B and C phases.

A slave inverter does not create an independent output. It simply assists the master or subphase master by
adding power to the output as needed.
~ The Power Save function can place slave inverters in “Silent” mode when not in use. They are activated
by the master or subphase master when required.
NOTE: The FW-X240 and similar transformers are not used for load balancing of stacked FXR inverters.
Each inverter is assigned to a particular phase when assigned a port on the HUB10.3 communications
manager. Port assignments will vary with the system. The master must be plugged into port 1. In
parallel stacking, any slave inverter can use any other port, beginning with port 2. In series or
three-phase stacking, the port assignments are very specific. See the HUB10.3 literature for more
information. Regardless, it is important to keep track of units and ports for programming purposes.
Programming uses the system display to assign a status and stacking value to the inverter on each
port. As long as the master is plugged into port 1, these assignments can be changed as needed.
30
900-0166-01-00 Rev B
Installation
IMPORTANT:

The master inverter must always be connected to port 1 on the communications
manager. 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. Overloading may cause circuit
breakers to open or the inverters to shut down.
Stacking Configurations
Series Stacking (Dual-Stack)
In series stacking, two inverters create two separate 120 Vac4 output phases. One phase is the master.
The second inverter is a subphase master. It creates a 120 Vac output that is intentionally 180° out of
phase with the master. Each of these outputs can be used to power a separate set of 120 Vac loads.
Collectively they form a “split-phase” configuration. This configuration produces 240 Vac, which can
be used to power 240 Vac loads when both inverters work together.

The two outputs operate independently of each other. The 120 Vac loads on each output cannot exceed a
given inverter’s size. The second inverter cannot assist.

Only two inverters, one per output, may be installed in a series arrangement. They must be the same model.
LOAD PANEL
Master (L1)
2.0 kVA
120 Vac
2.0 kVA 120 Vac
OR
4.0 kVA
240 Vac
L2 Phase Master
2.0 kVA
120 Vac
2.0 kVA 120 Vac
Figure 23
Example of Series Stacking Arrangement
When installing a series inverter system, observe the following rules.

Series stacking requires both the system display and the communications manager. See the HUB10.3
literature for any required jumper configurations.

The master must be connected to communications manager port 1. It is programmed as Master.
Other inverters must not be selected as master.
4 Output voltages may vary with regional voltage standards.
900-0166-01-00 Rev B
31
Installation

The second inverter must be programmed as L2 Phase Master. It must be connected to port 7.

All overcurrent devices must be sized for 60 Aac or less. All wiring must be sized for 60 Aac or more.

All output circuit breakers must be sized appropriately for loads and inverter power.

The AC input (generator or utility grid) must be a split-phase source of the proper voltage and frequency.

When wiring the AC source to the inverters, local codes may require the inverter circuit breakers to be
located at the bottom of the main panel. This prevents overloading of the AC bus.
NOTE: The FW-X240 and similar transformers are not used for load balancing of stacked FXR inverters.
AC Source
(Utility Grid or AC Generator)
AC Conduit Box
MATE3
HUB 10.3
Neutral
TBB
GND
Hot L1
TBB
Hot L2
TBB
10 9 8 7 6 5 4 3 2 1 MATE
CAT5 Cables
Input
Circuit
Breaker
AC
Neutral
IN
AC
Neutral
IN
AC
Hot IN
(L1)
HUB/
MATE
Input
Circuit
Breaker
AC
Hot IN
(L2)
Inverter
Inverter
L1 Master
L2 Subphase
Master
AC
Neutral
OUT
AC
Hot OUT
(L1)
GND
AC
Neutral
OUT
GND
AC
Hot OUT
(L2)
Mechanical
Interlock
Ground TBB
(may be within AC
Conduit Box)
Bypass
Circuit
Breakers
Output
Circuit
Breakers
Primary
System
Ground
LEGEND
GND
Hot L1
Neutral
TBB
Hot L1
TBB
Hot L2
Neutral
Ground
TBB = Terminal Bus Bar
AC Loads
Hot L2
TBB
NOTES:
1. Neutral (common) conductor may
be connected from only one inverter
neutral terminal to a common bus
bar in the AC conduit box.
2. Colors shown here may be different
from wiring standards.
Figure 24
32
HUB/
MATE
Series Wiring (Two Inverters)
900-0166-01-00 Rev B
Installation
Parallel Stacking (Dual-Stack and Larger)
In parallel stacking, two or more inverters create a single, common 120 Vac5 bus.

The slave outputs are controlled directly by the master and cannot operate independently.

All inverters share a common input (AC source) and run loads on a common output.

Slave inverters can go into Silent mode when not in use. The master will activate individual slaves based on
load demand. This reduces idle power consumption and improves system efficiency.

Up to ten inverters may be installed in a parallel arrangement. The example on this page shows three
inverters. The wiring diagram on the next page shows four. All inverters must be the same model.
LOAD
PANEL
Master
2.0 kVA 120 Vac
Figure 25
Slave
2.0 kVA 120 Vac
Slave
2.0 kVA 120 Vac
6.0 kVA
120 Vac
Example of Parallel Stacking Arrangement (Three Inverters)
When installing a parallel inverter system, observe the following rules.

Parallel stacking requires both the system display and the communications manager. See the HUB10.3
literature for any required jumper configurations.

The inverter that is mounted physically lowest is always the master and is programmed as Master.
Mounting below the other inverters allows the master to avoid heat buildup and remain relatively cool as it
sees the greatest duty cycle.

The master must be connected to port 1 of the communications manager. Other inverters must not be
selected as master.

All slave inverters, regardless of number, should be selected as Slave during programming. Slaves can be
connected to any port numbered 2 and above.

All overcurrent devices must be sized for 60 Aac or less. All wiring must be sized for 60 Aac or more.

All output circuit breakers must be sized appropriately for loads and inverter power.

The AC input (generator or utility grid) must be a single-phase source of the proper voltage and frequency.

When wiring the AC source to the inverters, local codes may require the inverter circuits to be located at the
opposite end of the panel from the main circuit breaker. This prevents overloading of the AC bus.
5
Output voltages may vary with regional voltage standards.
900-0166-01-00 Rev B
33
Installation
AC Source
(Utility Grid or
AC Generator)
MATE3
LEGEND
Hot L1
Neutral
HUB 10.3
10 9 8 7 6 5 4 3 2 1
Ground
MATE
TBB = Terminal Bus Bar
AC Conduit Box
CAT5 Cables
Neutral
TBB
GND
Hot L1 TBB
AC
HUB/
Neutral MATE
IN
AC
Hot IN
(L1)
Input
Circuit
Breaker
Input
Circuit
Breaker
Input
Circuit
Breaker
HUB/
AC
AC
Neutral MATE Hot IN
IN
(L1)
AC
HUB/
AC
Neutral MATE Hot IN
IN
(L1)
Input
Circuit
Breaker
AC
HUB/
AC
Neutral MATE Hot IN
(L1)
IN
Inverter
Inverter
Inverter
Inverter
L1 Master
L1 Slave
L1 Slave
L1 Slave
AC
AC
Neutral
Hot OUT
GND (L1)
OUT
AC
AC
Neutral
Hot OUT
(L1)
OUT GND
AC
Neutral
OUT
GND
AC
Hot OUT
(L1)
AC
AC
Hot OUT
Neutral
(L1)
OUT GND
Mechanical
Interlock
Ground TBB
(may be within
AC Conduit Box)
Output
Circuit
Breakers
Primary
System
Ground
GND
Hot L1 TBB
Neutral TBB
AC Loads
Bypass
Circuit
Breakers
NOTES:
1. Neutral (common) conductor may
be connected from only one inverter
neutral terminal to a common bus
bar in the AC conduit box.
2. Colors shown here may be different
from wiring standards.
Figure 26
34
Parallel Wiring (Four Inverters)
900-0166-01-00 Rev B
Installation
Series/Parallel Stacking (Quad-Stack or Larger)
In series/parallel stacking, inverters create separate 120 Vac6 output phases and 240 Vac collectively, as
in series stacking. However, in this configuration, each output has parallel inverters. One output
contains the master; the other uses a subphase master. Each output has at least one slave.

The 120 Vac loads on each output can exceed the size of a single inverter. They can be powered by all the
inverters on that output.

The slave outputs are controlled directly by their respective master inverters. They cannot operate
independently. The slaves can go into Power Save mode when not in use.

Up to eight inverters may be installed in a series/parallel arrangement. All inverters must be the same model.
LOAD PANEL
Master
3 kVA 120 Vac
Slave
6 kVA
120 Vac
3 kVA 120 Vac
OR
L2 Phase
Master
3 kVA 120 Vac
Figure 27
12 kVA
240 Vac
Slave
3 kVA 120 Vac
6 kVA
120 Vac
Example of Series/Parallel Stacking Arrangement (Four Inverters)
When installing a multiple-inverter series/parallel system, observe the following rules.

Series/parallel stacking requires both the system display and the communications manager. See the
HUB10.3 literature for any required jumper configurations.

The inverter that is mounted physically lowest is always master and is programmed as Master.
Mounting below the other inverters allows the master to avoid heat buildup and remain relatively cool as it
sees the greatest duty cycle.

The master must be connected to port 1 of the communications manager. Other inverters must not be
selected as master.

Any other inverter on the L1 output (parallel with the master) should be selected as Slave during
programming. These can be connected to ports 2 through 4. L1 inverters cannot use other ports.

The subphase master for the L2 output must be programmed as L2 Phase Master. It must be connected
to port 7.

Any other inverter on the L2 output (parallel with the subphase master) should be selected as Slave during
programming. These can be connected to ports 8 through 10. L2 inverters cannot use other ports.

All overcurrent devices must be sized for 60 Aac or less. All wiring must be sized for 60 Aac or more.

All output circuit breakers must be sized appropriately for loads and inverter power.

The AC input (generator or utility grid) must be a split-phase source of the proper voltage and frequency.

When wiring the AC source to the inverters, local codes may require the inverter circuits to be located at the
opposite end of the panel from the main circuit breaker. This prevents overloading of the AC bus.
NOTE: The FW-X240 and similar transformers are not used for load balancing of stacked FXR inverters.
6
Output voltages may vary with regional voltage standards.
900-0166-01-00 Rev B
35
Installation
AC Source
(Utility Grid or
AC Generator)
MATE3
LEGEND
Hot L1
Hot L2
Neutral
HUB 10.3
Ground
10 9 8 7 6 5 4 3 2 1 MATE
TBB = Terminal Bus Bar
AC Conduit Box
CAT5 Cables
Neutral TBB
GND
Hot L1 TBB
Hot L2 TBB
Input
Circuit
Breaker
Input
Circuit
Breaker
Input
Circuit
Breaker
AC
HUB/
AC
Neutral MATE Hot IN
IN
(L1)
AC
AC
HUB/
Neutral MATE Hot IN
IN
(L1)
Inverter
L1 Master
AC
AC
Hot OUT
Neutral
OUT GND (L1)
Input
Circuit
Breaker
AC
HUB/
AC
Neutral MATE Hot IN
IN
(L2)
HUB/
AC
AC
Neutral MATE Hot IN
IN
(L2)
Inverter
Inverter
Inverter
L1 Slave
L2 Subphase
Master
L2 Slave
AC
AC
Neutral
Hot OUT
OUT GND
(L1)
AC
AC
Neutral
Hot OUT
OUT GND (L2)
AC
AC
Neutral
Hot OUT
OUT GND
(L2)
Mechanical
Interlock
Ground TBB
(may be within
AC Conduit Box)
Output
Circuit
Breakers
Primary
System
Ground
GND
Neutral TBB
Hot L1 TBB
Bypass
Circuit
Breakers
Hot L2 TBB
AC Loads
NOTES:
1. Neutral (common) conductor may
be connected from only one inverter
neutral terminal to a common bus
bar in the AC conduit box.
2. Colors shown here may be different
from wiring standards.
Figure 28
36
Series/Parallel Wiring
900-0166-01-00 Rev B
Installation
Three-Phase Stacking
In three-phase stacking, inverters create three separate 120 Vac7 output phases in a wye configuration.

The three phases (A, B, and C) operate independently of each other. The inverters on one phase cannot assist
another. Several inverters can be installed in parallel on one phase to power all 120 Vac loads on that phase.

The output of each inverter is 120° out of phase from the others. Any two outputs produce 208 Vac
between them. The outputs can be used to power three-phase loads when all inverters work together.

Up to nine inverters, three per phase, may be installed in a three-phase arrangement. (The wiring drawing
on the next page shows only one inverter per phase.) All inverters must be the same model.
LOAD PANEL
Master
2.0 kVA 120 Vac
2.0 kVA
120 Vac
B Phase Master
2.0 kVA
120 Vac
2.0 kVA 120 Vac
OR
6.0 kVA
208 Vac
C Phase Master
2.0 kVA
120 Vac
2.0 kVA 120 Vac
Figure 29
Example of Three-Phase Stacking Arrangement (Three Inverters)
LOAD PANEL
Master
2.0 kVA 120 Vac
2.0 kVA 120 Vac
B Phase
Master
2.0 kVA 120 Vac
Figure 30
7
Slave
2.0 kVA 120 Vac
C Phase
Master
2.0 kVA 120 Vac
Slave
Slave
2.0 kVA 120 Vac
Slave
2.0 kVA 120 Vac
6.0 kVA
120 Vac
Slave
2.0 kVA 120 Vac
18.0 kVA
6.0 kVA
OR
208 Vac
120 Vac
Slave
2.0 kVA 120 Vac
6.0 kVA
120 Vac
Example of Three-Phase Stacking Arrangement (Nine Inverters)
Output voltages may vary with regional voltage standards.
900-0166-01-00 Rev B
37
Installation
When installing a three-phase system, observe the following rules.

Three-phase stacking requires both the system display and the communications manager. See the HUB10.3
literature for any required jumper configurations.

The inverter that is mounted physically lowest is always master and is programmed as Master.
Mounting below the other inverters allows the master to avoid heat buildup and remain relatively cool as it
sees the greatest duty cycle.

The master must be connected to port 1 of the communications manager. Other inverters must not be
selected as master.

Any other inverter on the Phase A output (parallel with the master) should be selected as Slave during
programming. These can be connected to ports 2 or 3. Phase A inverters cannot use other ports.

The subphase master for the Phase B output must be programmed as B Phase Master. It must be
connected to port 4.

Any other inverter on the Phase B output (parallel with the B subphase master) should be selected as Slave
during programming. These can be connected to ports 5 or 6. Phase B inverters cannot use other ports.

The subphase master for the Phase C output must be programmed as C Phase Master. It must be
connected to port 7.

Any other inverter on the Phase C output (parallel with the C subphase master) should be selected as Slave
during programming. These can be connected to ports 8, 9, or 10. Phase C inverters cannot use other ports.

All overcurrent devices must be sized for 60 Aac or less. All wiring must be sized for 60 Aac or more.

All output circuit breakers must be sized appropriately for loads and inverter power.

The AC input (generator or utility grid) must be a three-phase wye configuration source of the proper
voltage and frequency.

When wiring the AC source to the inverters, local codes may require the inverter circuits to be located at the
opposite end of the panel from the main circuit breaker. This prevents overloading of the AC bus.
38
900-0166-01-00 Rev B
Installation
AC Source
(Utility Grid or AC Generator)
MATE3
HUB 10.3
10 9 8 7 6 5 4 3 2 1
AC Conduit Box
MATE
Neutral TBB
GND
Phase A
TBB
Phase B
TBB
Phase C
TBB
CAT5 Cables
Input
Circuit
Breaker
AC
HUB/
Neutral MATE
IN
AC
HUB/
AC
Neutral MATE Hot IN
IN
(B)
AC
Hot IN
(A)
Input
Circuit
Breaker
Input
Circuit
Breaker
AC
HUB/
AC
Neutral MATE Hot IN
IN
(C)
Inverter
Inverter
Inverter
Phase A Master
Phase B
Subphase Master
Phase C
Subphase Master
AC
Neutral
OUT
AC
Neutral
OUT
AC
Hot OUT
GND
(A)
AC
Hot OUT
GND
(B)
AC
AC
Neutral
Hot OUT
GND
OUT
(C)
Mechanical
Interlock
Output
Circuit
Breakers
Ground TBB
(may be within
AC Conduit Box)
Bypass
Circuit
Breakers
Primary System
Ground
GND
LEGEND
Phase A
Phase B
Phase C
Neutral
Ground
TBB = Terminal Bus Bar
Neutral
TBB
Phase A
TBB
AC
Loads
Phase B
TBB
Phase C
TBB
NOTES:
1. Neutral (common) conductor
may be connected from only
one inverter neutral terminal to
a common bus bar in the AC
conduit box.
2. Colors shown here may be
different from wiring standards.
Figure 31 Three-Phase Wiring (Three Inverters)
900-0166-01-00 Rev B
39
Installation
NOTES:
40
900-0166-01-00 Rev B
Commissioning
Functional Test
WARNING: Shock Hazard and Equipment Damage
The inverter’s AC and DC covers must be removed 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.
It is highly recommended that all applicable steps be performed in the following order. However, if
steps are inapplicable, they can be omitted.
If the results of any step do not match the description, see the Operator’s Manual for troubleshooting.
Pre-startup Procedures
1. Ensure all DC and AC overcurrent devices are opened, disconnected, or turned off.
2. Double-check all wiring connections.
3. Confirm that the total load does not exceed the inverter’s rated power.
4. Inspect the work area to ensure tools or debris have not been left inside.
5. Using a digital voltmeter (DVM) or standard voltmeter, verify battery voltage. Confirm the
voltage is correct for the inverter model. Confirm the polarity.
6. Connect the 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.
IMPORTANT:
Prior to programming (see Startup), verify the operating frequency of the AC source. This is necessary for
correct AC operation. The default setting is 60 Hz, but this can be changed to 50 Hz.
Startup
To start a single-inverter system:
1. Close the main DC circuit breakers (or connect the fuses) from the battery bank to the inverter.
Confirm that the system display is operational, if present.
900-0166-01-00 Rev B
41
Installation
Figure 32
AC Terminals
2. If a system display is present, perform all programming for all functions.
These functions may include AC input modes, AC output voltage, input current limits, battery
charging, generator starting, and others.
3. Turn on the inverter using the system display (or external switch, if one has been installed).
The inverter’s default condition is Off. Do not turn on any AC circuit breakers at this time.
4. Using a DVM or voltmeter, verify 120 Vac (or appropriate voltage) between the AC HOT OUT
and AC NEUTRAL OUT terminals. (See Figure 32 for AC terminals.) The inverter is working
correctly if the AC output reads within 10% of 120 Vac or the programmed output voltage.
Proceed past the items below to Step 5 on the next page.
To start a multiple-inverter (stacked) system:
1. Close the main DC circuit breakers (or connect the fuses) from the battery bank to the inverter.
Repeat for every inverter present. Confirm that the system display is operational.
With the system display, perform any programming for stacking and all other functions.
These functions may also include AC input modes, AC output voltage, input current limits,
battery charging, generator starting, and others. When stacking in parallel, all slave inverters will
observe the master programming settings. They do not need to be programmed individually.
The MATE3 Configuration Wizard may be used to assist programming.
2. Turn on the master inverter using the system display (or external switch, if one has been
installed). The inverter’s default state is Off. Do not turn on any AC circuit breakers at this time.
3. Using the system display, temporarily bring each slave out of Silent mode by raising the Power
Save Level of the master.

As each slave is activated, it will click and create an audible hum.

Confirm that the system display shows no fault messages.
4. Using a DVM or voltmeter, verify appropriate voltage between the AC HOT OUT terminal on
the master inverter and the AC HOT OUT terminal on each slave. Series inverters should read
42
900-0166-01-00 Rev B
Installation
within 10% of 120 Vac or the programmed output voltage. Parallel inverters should read
close to zero. Three-phase inverters should read within 10% of 208 Vac or the designated
output voltage.

When this test is finished, return the master to its previous Power Save Level.
After output testing is completed, perform the following steps:
5. 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.
6. Use a DVM to verify correct voltage at the AC load panel.
7. Connect a small AC load and test for proper functionality.
8. Close the AC input circuit breakers and connect an AC source.

Using a DVM or voltmeter, check the AC HOT IN and AC NEUTRAL IN terminals for 120 Vac
(or appropriate voltage) from the AC source.

If a system display is present, confirm that the inverter accepts the AC source as appropriate for its
programming. (Some modes or functions may restrict connection with the source. If one of these
selections has been used for the system, it may not connect.) Check the system display indicators
for correct performance.
9. If the charger is activated, the inverter will perform a battery charging cycle after powering up.
This can take several hours. If restarted after a temporary shutdown, the inverter may skip
most or all of the charging cycle. Confirm that it is charging as appropriate by using the
system display.
10. Test other functions which have been enabled, such as generator start, selling, or search mode.
11. Compare the DVM’s readings with the system display meter readings. If necessary, the system
display’s readings can be calibrated to match the DVM more accurately. Calibrated settings
include AC input voltage, AC output voltage, and battery voltage.
Powering Down
These steps will completely isolate the inverter.
To remove power from 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 turn off the system according to the Power Down
instructions. After adding new devices, perform another functional test, including programming.
900-0166-01-00 Rev B
43
Installation
Firmware Updates
IMPORTANT:
All inverters will shut down during firmware updates. If loads need to be run while
updating the firmware, bypass the inverter with a maintenance bypass switch.
Communication cables must remain connected and DC power must remain on.
Interrupted communication will cause the update to fail and the inverter(s) may not work
afterward. Inverters automatically update one at a time beginning with the highest port.
Each requires about 5 minutes.
Updates to the inverter’s internal programming are periodically available at the OutBack website
www.outbackpower.com. If multiple inverters are used in a system, all units must be upgraded at the same
time. All units must be upgraded to the same firmware revision.
IMPORTANT:
All stacked FXR inverters must have the same firmware revision. If multiple stacked
inverters are used with different firmware revisions, any inverter with a revision different
from the master will not function. (See the stacking section on page 30.) The MATE3 will
display the following message:
An inverter firmware mismatch has been detected. Inverters X, Y, Z 8 are disabled. Visit
www.outbackpower.com for current inverter firmware.
Operation
Once the mounting, wiring, and other installation steps are completed, proceed to the FXR Series
Inverter/Charger Operator’s Manual.
Refer to the system display manual for programming instructions and menus.
8 The port designations for the mismatched inverters are listed here.
44
900-0166-01-00 Rev B
Installation
Definitions
The following is a list of initials, terms, and definitions used with this product.
Table 6
Terms and Definitions
Term
Definition
AC
Alternating Current; refers to voltage produced by the inverter, utility grid, or generator
AC Plate
Inverter accessory to accommodate flexible cable when conduit is not used
AGS
Advanced Generator Start
AUX
Inverter’s 12-volt auxiliary output
Communications
manager
Multi-port device such as the OutBack HUB10.3; used for connecting multiple OutBack devices on
a single remote display; essential for stacking inverters
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
DCC
DC Cover; shields the DC terminal area on vented FXR inverters
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
GFDI
Ground Fault Detector Interruptor; a safety device for PV systems
GND
Ground; a permanent conductive connection to earth for safety reasons; also known as Chassis
Ground, Protective Earth, and PE
Grid-interactive,
grid-intertie, grid-tie
Utility grid power is available for use and the inverter is capable of returning (selling) electricity
back to the utility grid
HUB10.3
An OutBack communications manager product; used for system stacking and coordination
Invert, inverting
The act of converting DC voltage to AC voltage for load use or other applications
LED
Light-Emitting Diode; refers to indicators used by the inverter and the system display
Master
An inverter which provides the primary output phase of a stacked system; other stacked inverters
base their output and on/off state on the master
MATE3
An OutBack system display product, used for monitoring, programming and communicating with
the inverter
NEU
AC Neutral; also known as Common
Neutral-to-ground bond A mechanical connection between the AC neutral (Common) bus and the ground (PE) bus; this
bond makes the AC neutral safe to handle
Off-grid
Utility grid power is not available for use
On-grid
Utility grid power is available for use (does not imply grid-interactive capability)
PV
Photovoltaic
900-0166-01-00 Rev B
45
Installation
Table 6
Term
Terms and Definitions
Definition
RE
Renewable Energy
RTS
Remote Temperature Sensor; accessory that measures battery temperature for charging
Slave
An inverter which adds additional power to the master or subphase master in a stacked system;
a slave does not provide an output of its own
Split-phase
A type of utility electrical system with two “hot” lines that typically carry 120 Vac with respect to
neutral and 240 Vac with respect to each other; common in North America
Subphase Master
An inverter which provides the output for additional phases of a stacked system; the output of a
subphase master is based on the output of the master
System display
Remote interface device (such as the MATE3), used for monitoring, programming and
communicating with the inverter; also called “remote system display”
Three-phase, 3-phase
A type of utility electrical system with three “hot” lines, each 120° out of phase; each carries the
nominal line voltage with respect to neutral; each carries voltage with respect to each other
equaling the line voltage multiplied by 1.732
Turbo Fan
External cooling fan used in place of the DCC on sealed FXR inverters
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”
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.
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 Operator’s Manual for the
appropriate inverter model. Another common reference is the system display manual.
46
900-0166-01-00 Rev B
Index
DVM ...................................................................... 15, 41, 42, 43
A AC Plate....................................................................................... 6
AC Terminals ................................................................9, 17, 23
AC Test Points ......................................................................... 42
Adding New Devices ............................................................ 43
Advanced Generator Start (AGS) ...................................... 27
Applications .............................................................................. 9
Automatic Generator Start ................................................. 27
AUX Terminals ........................................................................ 17
AXS Port ...................................................................................... 5
E Emergency Power Off (EPO) .............................................. 25
Environmental Requirements ........................................... 15
F Features .......................................................................................5
Firmware .................................................................................. 44
Functional Test....................................................................... 41
B G Battery Bank ............................................................................ 11
Sizing................................................................................12
Battery Terminal Covers ................................................. 6, 21
Gen Alert .................................................................................. 27
Generator ......................................................29, 31, 33, 35, 37
Applications ............................................................. 9, 24
Control ..................................................................... 27, 28
Sizing ............................................................................... 13
Type.................................................................................. 13
GFDI .................................................................................... 18, 45
Grid-Interactive .................................................................. 9, 45
Grounding ........................................................................ 17, 18
C Commissioning ...................................................................... 41
Communication Cables ......................................... 17, 25, 30
Communications Manager
Connections..................................................... 17, 25, 30
Stacking...................................................... 31, 33, 35, 37
Components ............................................................................. 6
Conductor Size
AC Conductors ..............................................................23
DC Conductors .............................................................20
Ground Conductors ....................................................18
Control Wiring Terminal Block .......................................... 17
H HUB10.3 ............................................................................. 25, 30
I Ingress Protection (IP).......................................................... 15
Input Modes ............................................................................ 10
D DC Cover (DCC) ...........................................................6, 15, 22
DC Terminals ............................................................. 17, 20, 21
Definitions................................................................................ 45
Dimensions .............................................................................. 16
Diversion Control................................................................... 26
Drawings
General System Layout ................................................ 9
Parallel-Stacked System.............................................34
Series/Parallel System ................................................35
Series-Stacked System ...............................................32
Single-Inverter System ...............................................29
Three-Phase System....................................................39
900-0166-01-00 Rev B
J Jumper ............................................................................... 17, 25
L LED Indicators......................................................................... 17
Listings .........................................................................................5
Location .................................................................................... 15
47
Index
M Master (Stacking)........................................ 30, 31, 33, 35, 37
MATE/HUB Port ...................................................................... 25
MATE3 ..................................................................... 5, 25, 30, 46
Models ......................................................................................... 6
Modes ....................................................................................... 10
Mounting ................................................................................. 16
Multiple AC Sources ............................................................. 24
N Neutral-Ground Bonding...................................... 13, 18, 23
O On and Off ........................................................................ 17, 25
OPTICS RE ................................................................................... 5
P Symbols Used..........................................................................46
System Display................................................................. 44, 46
Connections ........................................................... 17, 25
Programming ...........................................13, 26, 27, 30
Stacking ......................................................31, 33, 35, 37
T Temperatures ..........................................................................15
Terms and Definitions ..........................................................45
Test .............................................................................................41
Test Points ................................................................................42
Three-Phase Stacking ...........................................................37
Tools Required ........................................................................15
Torque Requirements
AC Terminals ................................................................. 23
DC Terminals................................................................. 20
Ground Terminals ....................................................... 18
Transformer .............................................................................13
Turbo Fan ............................................................................ 6, 22
Parallel Stacking .................................................................... 33
Ports, RJ45 and RJ11...................................................... 17, 25
Positive Grounding ............................................................... 18
Powering Down ..................................................................... 43
PV 9, 10
U R V Relative Humidity (RH) ........................................................ 15
Remote Temperature Sensor (RTS) ...................... 6, 17, 25
Renewable Energy ................................................................ 10
Vent Fan ....................................................................................26
Vented Models................................................................... 6, 15
S Sealed Models .................................................................... 6, 15
Series Stacking ....................................................................... 31
Series/Parallel Stacking ....................................................... 35
Sizing ......................................................................................... 29
Slave (Stacking)..................................................30, 33, 35, 37
Stacking ............................................................................. 30, 44
Commissioning ............................................................ 42
Parallel............................................................................. 33
Series ............................................................................... 31
Series/Parallel ............................................................... 35
Three-Phase................................................................... 37
Stacking Mode Programming ............................................ 31
Startup ...................................................................................... 41
Subphase Master (Stacking) ..........................30, 31, 35, 37
Updating Firmware ...............................................................44
Utility Grid .................................................... 29, 31, 33, 35, 37
Applications .............................................................. 9, 24
W Website .....................................................................................44
Wiring ........................................................................................18
AC Connections ........................................................... 23
AUX Connections ........................................................ 26
DC Connections ........................................................... 20
Ground Connections.................................................. 18
Single Inverter .............................................................. 29
Stacking
Parallel............................................................................34
Series ..............................................................................32
Series/Parallel ..............................................................35
Three-phase .................................................................39
X XCT ..............................................................................................17
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900-0166-01-00 Rev B
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