12kW inverter UK. Aux port MicroInverter connection.
I have a 12kW 3phase SunSynk inverter. Both of the MPPTs are at capacity, and working fine. I have another string of 10 PV panels that I wish to incorporate into the SunSynk system, and I am considering a 5kW "microinvereter" connected to the AUX port. Although this arrangement is documented, I can find no AC electrical connection details. Do I need to obtain a 3 phase microinverter, or can a single phase unit be connected to a single phase of the 3 phase AUX port? I was thinking of a SOLIS 5kW inverter as it has low standby consumption, is cheap, DNO approved and available in 1 or 3 phase versions. Any comments / advice welcome. Thanks.
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I suspect that max. 4k is a cut-and-paste from the 8kW inverter that has found its way into every other manual. I’ve seen video where the max allowable is 50% inverter rating.