Re post #21. The electric company is going to buy back it’s own juice at a loss instead of buying it’s own batteries?
Even though the electric utility would buy its own electricity back at a higher price, it is not a loss transaction for the utility. It would only buy back power to meet peak demand, for which its marginal cost is high. It would pay less to buy back stored electricity than it would cost to generate electricity beyond its peak capacity. In effect, the car owner would get paid for storing electricity, and the utility avoids expensive capital costs for capacity that would only be used, say, 5% of the time.