The worst part is that it implies that the local grid is also undersized for a major power draw (Heatwave/Blizzard) since as the AC grid is essentially bi-directional the solar would have to both surpass that after the base draw of the regular buildings before the overvoltage start causing problems
I mean unless your on nuclear or something that takes entire days to throttle up or down in which case congratulations you are now on a 100% green grid
I mean unless your on nuclear or something that takes entire days to throttle up or down in which case congratulations you are now on a 100% green grid