It makes sense that there would be some pretty hefty electrical system upgrades to do bidirectional charging.

You can power the grid with solar panels that sells excess back but that’s not free.

You could put in a generator for backup in a power outage. That’s not free either.

In theory you could put in a battery pack and charge it at night when the rates are cheaper and then power your home in the day. Business are already doing this. It’s just a cost benefit analysis.

I can’t wait for this. I’ve gone down a few rabbit holes looking into solar and battery storage, and even just battery storage by itself to replace the generator we have for when power is out and/or to offset peak use time rates. But batteries are really expensive and I’ve already got a hundred kilowatt hours sitting in my garage.