microinverter + inverter offgrid, partial on batteries

[J.P.M.]

Ha ! The $90 MOSFET's always burn out before the $2 fuse kicks in.

Part of that may be a result of a possible lemma to Murphy's Law:

The probability of a more expensive/harder to get at component in a system protecting a cheaper part by failing first is inversely proportional to the ratio (least costly component/more costly component).