Inability to add pre-existing PV array to the Ford Home Integration System

[Zprime29]

This may not be what you are talking about but if a second inverter is connected to a non-HIS automatic transfer switch (ATS) and the HIS ATS is the first to detect a grid down condition does that mean anything connected to the second inverter will be inoperable in a grid-down situation?

That's getting into the land of "I'm no where close to being an electrician" so I'm not even going to hazard a guess here. I have a basic understanding for a single ATS, no clue how two would work. I'll defer to folk with more experience.

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