Did not know where to put this but with PG&E power outages I would love to use my car as battery backup. I checked into the powerwall but my cost would be about $18,500 installed for a 27 KW system. The batteries are about $13,000 of the cost. Since my car has 85kw it would make more since to use it. I know Tesla does not supply a way to do it since the original roadster. However there is a company Occiaso (Ossiaco: Power will never be the same.) that is coming out with a system to do it. Has any on checked it out and wonder if PG&E would allow it.