>Can you find a single day in the CAISO records where the net grid demand (so not including home solar, grid solar or grid wind) is below the amount produced by their nuclear and hydro?
If you can't, and I don't think you can, why do you claim his solar is useless?
Why would you take the number before grid wind, grid solar, and home solar?
I think the relevant number is is demand minus grid solar, grid wind, grid nuclear, and probably hydro.
My point is that it is inefficient.
It makes no sense to idle a commercial solar or wind farm with a purchase contract so that the electric company can also purchase residential solar.
It would be entirely different if the electric company had massive storage, but they don't. The residential solar generators do. It makes most sense for the electric company to buy residential solar only when it has been time shifted to when grid farms are not producing.