[metalmangler]

Rooftop solar is perfect. The lack of a full, east/west ultra high voltage transmission line to connect markets......like the one China is building out, is the issue. Once a grid is connecting time zones, rather than "regions" then the whole peak demand thing, just goes away, add batteries in the gaps, and for remaining peak clipping, and then averages start to become much closer to real world demand.

[s1artibartfast]

That doesn't solve the cost issue. Rooftop is at least 10X as expensive as plopping down panels on flat land, even before taking into account the efficiency of doing it in a desert vs rainy SF.

Same for home battery storage. A Powerwall ~$1000/kwh, grid storage is $250/kwh and can actually stabilize the grid.

Incentivizing it is a massive waste of public money. It is mandating citizens spend $1, when a commercial operation can do it for 10 cents.