Re: @AC - charging at home
You have an entire rooftop to devote to charging a single car.
I remember that, at one point, Honda were doing a demo of a home-hydrogen generation unit. The idea is that you have solar panels drive hydrogen cracking/storage unit where the hydrogen could be used in a fuel cell during the hours of darkness to generate electricity.
Any suplus hydrogen could be used to refuel a hydrogen-powered fual-cell car.
Shame it came to nothing :-(