Shade level threshold where it makes sense to switch to microinverters
We have switched mainly to Enphase for residential installs, due to Rapid Shutdown Device requirements (and poor SolarEdge reliability). However, we are looking at mixing in some SMA + APSmart RSDs. I was wondering if you have an approximate shade percentage threshold where you go to microinverters? I'm thinking maybe around 12% shade for systems less than 5 kW, maybe 18% for larger systems? Interested in others thoughts. I should add that Tigo has caused problems with Fronius' Arc Fault protection algorithms. I assume SMA has had problems, also, since they are dumping Tigo. Thanks!
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