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Nik, 120/208 has a 120 degree phase angle between legs, same as three-phase but you only have two legs. Check with Outback tech support, but I believe the GTFX inverter can only be stacked in systems with 120/240 split phase (180 degrees between legs). If there are no 208 loads, just unplug the second inverter from the Hub and program both inverters to be a Master so you have two independent 120-volt systems. With two independent 120-volt systems you should have a separate neutral conductor for each inverter, on the load side because the two inverters aren't synchronized when there is no utility power. On the source side they can share a neutral, but it has to be the same size as the hot legs, because line power keeps them in sync. If you have 208 loads on the backup power panel; well -- you can't do it unless Outback has support for three-phase grid connected systems. Kent Osterberg Blue Mountain Solar, Inc. Nik Ponzio wrote: Hi Gang, |
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