Stacked Fx Systems - Outback GTFX2012E Installation Manual

STACKED FX SYSTEMS

The FX inverter can be used singly, or in a "stacked" system. Stacking refers to interfacing multiple
inverters with the OutBack HUB networking accessory. Stacked inverters coordinate their outputs and
can produce far more power than a single inverter. Wattage can be combined onto a single-phase
bus, or onto a three-phase system.
PARALLEL STACKING
• FX inverters can be stacked in parallel. This will provide the wattage of multiple units on the same
230 Vac bus.
• Up to ten FX inverters can be paralleled. Systems larger than four inverters require the OutBack
HUB10 accessory.
• This book gives examples of "parallel dual" and "parallel quad" installations, with two and four units
respectively. These systems require the use of the OutBack HUB4. The HUB10 can be used if other
devices need to be networked along with the inverters.
THREE-PHASE STACKING
• Three FX inverters can be stacked to supply three-phase power. This will provide the wattage of
three units on a 230/400 Vac bus.
• Parallel stacking requires the use of the OutBack HUB4. The HUB10 can be used if other devices
need to be networked along with the inverters.
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