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FX SERIES INVERTER/CHARGER PROGRAMMING
NOTE: Please see the International FX and VFX Series Inverter/Charger Installation Manual to install, wire,
and connect each FX. This programming manual assumes all FXs have been installed and are ready to
program according to the way they were wired. If a di erent programming is desired, the FXs might
require a di erent wiring con guration (see sample wiring diagrams in the FX and VFX Series Inverter/
Charger Installation Manual). To familiarize yourself with the programming concepts, please read
through the entire manual before programming your system.
Up to ten o -grid FXs or three FXs in a three-phase system can be combined and wired or “stacked”
for systems requiring more power. A user’s nal loads and power needs determine which stacking
con guration will work best.
• Stacking FXs does not refer to physically placing one FX on top of another, but to how they are
wired within the system and then programmed for operation. Stacking allows all the FXs to work
together as a single system.
• Stacking assigns the FXs to power individual legs of the system and to operate at certain times; this
order is assigned using the MATE.
• NOTE: An OutBack MATE is required to recognize and program the FXs. When multiple FXs are used,
each needs to be assigned a status—Master or Slave.
• The Master FX is the primary and most heavily used unit. The loads and demands of the system
determine when and which Slaves are used. A Slave FX assists when the load demands are more
than the Master FX can handle alone.
• This is an orderly process as long as the user assigns each FX correctly. It is mainly a matter of
paying attention to the Port number for each FX when programming with the MATE.
Stacking Concerns
FXs should be wired and stacked appropriately to their individual power system. Problems can occur
when:
• An FX is incorrectly wired.
• An FX plugged into a HUB Port is mistakenly programmed (assigned the wrong status) or
misidenti ed.
• An easy rule to remember is any FX wired to a speci c phase or leg must be programmed to that
phase.
Stacking Options
The International Series FX and VFX Series Inverter/Chargers can be stacked in the following
con gurations (see page 23).
1. OutBack Parallel
2. 3-Phase
Each stacking option has bene ts and should be chosen according to a user’s needs and individual
power system. Consult with your dealer or installer to determine what will work best for you.