Outback FXR Series Operator's Manual

Operation
900-0167-01-01 Rev A 25
Input
When the input terminals are connected to a stable AC source, the FXR inverter will
synchronize itself with that source and use it as the primary source of AC power. Its transfer
relay will engage, linking the AC source directly with the inverter’s output. It can also use the
source to charge batteries. (See
Battery Charging
on page 29.)

The loads powered by the inverter
must not
exceed the size of the inverter’s transfer relay.
CAUTION: Equipment Damage
Current draw in excess of the transfer relay rating can damage the transfer relay. This
damage is not covered by warranty. Use protective devices of appropriate size.

The inverter has a single AC input. However, it has two sets of AC source settings. With an external
transfer switch, the inverter can be used on more than one AC source. It is com
mon to use ut
ility grid
power an
d a gas or diesel generator. Other combinations of AC sources are po
ssible.
The inverte
r’s two input selections can be programmed for separate input modes. The select
ion
(
Grid
or
Ge
n
) can be chosen in the
Input Type
menu.

The interactions with AC input sources are controlled by the various input modes. The
Grid Tied
mode allows certain models to sell power using the input connection. The
Support
mode can use
battery power to assist a smaller AC source. When
GridZero
mode is selected, the battery charge
r
can
not be used. See page 21 for descriptions of these and other input modes.
AC Current Settings
The AC current settings,
Grid Input AC Limit
and
Gen Input AC Limit
, control the amount
of current that the inverter draws from the source. Adjust these settings to match the input
circuit breakers.

The adjustment is meant to protect a generator or source that cannot supply enough current for
both chargi
ng and loads. If the combined charging and loads
exceed the setting, the inverter will
redu
ce its charge rate and give priority to the loads. If the loads exceed this number on
their own,
the charge rate will be reduced to zero.

The
AC Limit
settings can limit the charging current, although the charger has an individual setting.
(See pa
ge 29.) Note that this does not limit the current sold in
Grid Tied
mode. (See page 16
.)

The
GridZero
input mode requires the inverter to use DC sources, limiting the amount of AC current
use
d
. See page 20.

The
Support
input mode allows the inverter to support the AC source with battery power. See
page 1
4
.

The AC input current is used to power both loads and battery charging. The combined amount
should not exceed the size of the AC overcurrent device or AC source. These devices should
be
sized ap
propriately during planning and installation of the inverter
system.

If multiple parallel inverters are installed with an AC source of limited amperage, the total combined
ampe
rage settings for all units must be less than the AC input circuit. The Profile Wizard in a
MATE3-class system display can perform this calculation. However, the inverters do not perfor
m this
cal
culation. If the system display or the Profile Wizard are not used, divide the input si
ze by the
numbe
r of inverters and assign an equal part of the amperage to each port.
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