OutBackPower FXR Renewable Series 230V E Model Operator’s Manual

Operation
40 900-0169-01-00 Rev B
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 10 shows
Master
for the first inverter in a parallel-stacked system. The remaining
inverters are designated
Slave
. Figure 11 and Figure 12 show
Master
and
Slave
designations for
Phases A, B, and C in three-phase systems.
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.
Figure 10 Example of Parallel Stacking Arrangement (Three Inverters)
Three-Phase Stacking
In three-phase stacking, inverters create three separate 230 Vac
3
output legs in a wye configuration.

The three legs operate independently of each other. The output of each inverter is 120° out of phase
from the others. Any two outputs produce 400 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. On the next page,
Figure 11 shows one inverter per phase. Figure 12 shows three inverters per phase.

All inverters must be the same model.
3
Output voltages may vary with regional voltage standards.
6.0 kVA
120 Vac
2.0 kVA 120
2.0 kVA 120 Vac
2.0 kVA 120 Vac
LOAD PANEL
Master Slave Slave