Series or series/parallel dual fx configuration – Outback Power Systems FX Series Installation Manual User Manual

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SERIES or SERIES/PARALLEL DUAL FX CONFIGURATION

• This system can continuously power between 4.0kW and 7.2kW of loads depending on which

model is used.

• All non-Mobile FX AC wiring must handle 60AAC or more.

• A Mobile FX requires 30A input breakers.

NOTE:
• Stacking FXs in series/parallel means there are FXs directly connected to two separate 120VAC

output legs. These legs produce 240VAC between them (the series portion). This allows all of the
FXs to power either of the 120VAC output legs (the parallel portion). Series/parallel stacking requires
an FW-X240 Auto Transformer and must use “OutBack” stacking programming.

• When the FXs *are connected in series for 120/240 VAC, the FW-X240 Auto Transformer can be

connected to the AC output; both FXs are then available on either 120VAC output circuit. This allows
higher effi

ciency and better performance as heavy 120VAC loads are powered by both FXs. The

FW-X240 Auto Transformer also allows the Master to power loads on either 120VAC output circuit

with the Slave FX off , reducing idle power consumption and improving system effi

ciency.

• The Slave FX must be programmed through the MATE as a “Classic Slave’” (series stacking, no FW-

X240 Auto Transformer) or as “OB Slave L2” (series/parallel stacking, FW-X240 included)*. The FX
connected to Port 01 of the HUB is always the Master (1-2ph MASTER)

Grid-Tie FXs cannot be used with the FW-X240 Auto Transformer.