Greg Smiths book, The Battery Powered Home, actually has a chapter where he discussed just this topic. It is well written and I recommend it for a more up to date discussion of the topic.
-Glenn
On Nov 3, 2025 13:33, Dave Tedeyan via RE-wrenches <[email protected]> wrote:
Hi All,Does anyone have any real world data comparing the efficiency of microinverters vs. string inverters in a partial shading scenario? We all know the old selling point of micros with partial shading, saying that if one panel in a string is shaded, you lose production from the whole string. But that is not the case anymore with at least SMA inverters with their global MPPT sweeps. If one panel is shaded, you lose the voltage from that one panel, and that is it, the rest of the string operates normally. In this case, it seems like micros don't actually add much value in a partially shaded system.I am thinking specifically of something like a fixed tilt ground mount that will be getting somewhere near 70% TSRF. So there are no issues about modules facing different directions. I am curious if there are actually any significant differences in power production with a microinverter vs a string inverter system in this case. Unfortunately, any article written about this subject assumes using an older string inverter where one panel being shaded will knock out the whole string, in which case the answer is pretty clear.Cheers,Dave--
Dave Tedeyan, P.E.
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