I gotta say I didn't read the whole thread, but figured I would add in my two cents worth anyway:-)
CA currently generates more solar during peak periods than it can use so is trying to find ways to capture some of that output rather than just turning off some of the solar. Today, it is possible to set EV cars to charge during this peak solar time which is a bonus.
It would be nice to have additional ways to capture that peak solar but it is currently very expensive.
Having a way to use your car battery to sell power back to the power company during their peak needs would seem like quite a bonus. Of course, you could always unplug if you needed to go somewhere so I don't really see that as an issue. The bigger issue is the technology does not currently exist to do this.
Alan