Or they could use EVs. Require cars to have V2X (Vehicle to Grid, Vehicle to Load) feature. EV batteries are humongous.
Do any of the EVs sold in the US support Vehicle to Grid?
Nah, people want to wake up in the morning and know they can drive somewhere.
Requiring it is crazy.
The down votes are because you use the word require. They’re never going to require it it would be opt in.
As a consumer, would you want the extra usage on your battery? Those extra cycles have to cause some additional degradation to the system, but I do not know how much.