Wire Connections

Note: A system’s individual voltage requirements (120 single phase, 120/240 split phase, or 3-phase) as well as how each FX is to function all determine how the FXs are wired. Each FX must be wired to the logical leg or phase of the system. Each FX must be programmed or “stacked” according to this phase. Please see the FX and VFX Series Inverter/Charger Programming Manual before connecting any wires to or from the FX.

Follow these steps to wire the FX to your system:

1.Shut all AC breakers off or remove any fuses before connecting any wiring.

2.Shut off all DC breakers, including the PV breakers.

3.With all power off, run lengths of 6 AWG wire between the AC Wiring Compartment Board AC out terminals and a 30 or 60 amp over current protection circuit breaker depending on the FX model. The breaker should be installed inside of a metal chassis such as OutBack’s FLEXware series, PS-2, PS-4, or an existing panel.

4.With the over current protection connected, run lengths of 6 AWG wire between the AC Wiring Compartment Board AC IN terminals and the AC input breaker. The breaker should be installed inside of a metal chassis such as OutBack’s PS-2, PS-4, FLEXware series or an existing panel. The AC input hot conductor must be supplied through a 60 amp maximum AC branch rated circuit breaker.

Note: Connect Mobile FX equipment to an AC circuit with 30 amp maximum branch-circuit over- current protection (as per NEC, ANSI/NFPA 70).

While 60 amp over-current protection reduces the risk of fire, for further reduction, do not connect a single FX to both hot legs of a 120-240 VAC AC load center having multi-wire (common neutral) branch circuits connected. Use either two FX Series Inverter/Chargers wired in a series configuration or an FW-X240 Auto Transformer instead.

•Use crimped and sealed copper ring terminal lugs with 5/16” hole or compression-type lug to connect battery cables to DC terminals. Soldered cable lugs are also acceptable.

•Use recommended cable sizes (see page 32) to reduce losses and ensure high performance of FX (smaller cables can reduce performance and possibly damage the unit).

•Keep cables together (e.g., using a tie-wrap) as much as possible.

•Ensure cables pass through the same knockout and conduit fittings to allow inductive currents to cancel.