2,800W 12V Manual

Planning
10 900-0166-01-00 Rev A
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.