Outback Power Systems VFX Series Programming Manual - Manual (Page 20)

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FX Series Inverter/Charger Programming
NOTE: Please see the FX and VFX Series Inverter/Charger Installation Manual to install, wire, and
connect each FX Series Inverter/Charger. This programming manual assumes all FXs have
been installed and are ready to program according to the way they were wired. If a diff erent
programming is desired, the FXs might require a diff erent wiring confi 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 two grid-interactive FXs, ten off -grid FXs (including export models), or three FXs in a three-
phase system can be combined and wired or “stacked” for systems requiring more power. A user’s
fi nal loads and power needs determine which stacking confi 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.
• PLEASE NOTE: An OutBack MATE is required to recognize and program the FXs. When multiple
FX’s 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. This 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
misidentifi ed.
• An easy rule to remember is any FX wired to a specifi c phase or leg must be programmed to
that phase.
Stacking Options
The FX Series Inverter/Chargers can be stacked in the following confi gurations (see page 7).
1. OutBack Parallel
2. Classic Series
3. OutBack Series
4. OutBack Series/Parallel
5. 3-Phase
Each stacking option has benefi 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.