Outback FXR2012A User Manual

Operation
44 900-0167-01-00 Rev A
Stacking Configurations
Each inverter must be assigned a particular mode in the
Stack Mode
menu. In the figures for each
configuration below, the mode names are shown next to each inverter.
For example, Figure 11 shows
Master
for the first (L1) inverter in a series-stacked system. The
designation for the L2 inverter is
L2 Phase Master
. Figure 12 shows
Master
for the first inverter in a
parallel-stacked system and
Slave
for the remaining inverters.
Series Stacking (Dual-Stack)
In series stacking, two inverters create two separate 120 Vac
4
output phases (“legs”). One leg is the
master. The second inverter is a subphase master (not a slave). It creates a 120 Vac output that is
intentionally 180° out of phase with the master. Each of these legs 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 legs operate independently of each other. The 120 Vac loads on each leg cannot exceed a given
inverter’s wattage. The second inverter cannot assist.

Series stacking only uses two inverters, one per leg. See Series/Parallel Stacking on page 45 when using
more than two inverters. All inverters must be the same model.
Figure 11 Example of Series Stacking Arrangement
Parallel Stacking (Dual-Stack and Larger)
In parallel stacking, two or more inverters are stacked to create a single, common set of AC outputs.

All inverters share a common input (AC source). The inverters run loads on a common output bus. The master
inverter provides the primary output. The slaves are connected to the same output and assist the master.

The slave outputs are controlled directly by the master and cannot operate independently.

Slave inverters can go into Power Save 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.
4
Output voltages may vary with regional voltage standards.
2.0 kVA
120 Vac
4.0 kVA
240 Vac
2.0 kVA
120 Vac
2.0 kVA 120 Vac
2.0 kVA 120 Vac
LOAD PANEL
OR
Master
L2 Phase Master

Outback FXR2012A Specifications

General

Brand	Outback
Model	FXR2012A
Category	Battery Charger
Language	English