Don't know about virtual power plants, will look it up. Wrt. solar, that is why I specifically mentioned appartment blocks. We have many such blocks, which usu

Don't know about virtual power plants, will look it up. Wrt. solar, that is why I specifically mentioned appartment blocks. We have many such blocks, which usually have one to two levels of garages underneath. I do not think solar power can provide enough power to charge the same area of cars (in cases of one level underground garage), much less twice such area. Furthermore, solar power is fickle: it relies heavily on nice weather and we have plenty of cloudy or rainy days.