I’m not convinced EVs as grid response or virtual powerplants will be as important as people think. No EVs on sale right now can do it except the Nissan LEAF and the hardware required (a rectifier) is not cheap (approx A$10k). I’m also sceptical car owners will get much value out of it. Is it worth the hassle just for a few bucks on your electricity bill every month?
Fleets however represent much more of an opportunity. Buses, heavy vehicles (garbage trucks, delivery trucks, etc) and general fleet cars that are idle at night in a depot could be quite lucrative.