Yes, charge your car for free by using the sun.
Of course, you'd have to own the i-MiEV (said 'eemeeyev' in a drunk Russian accent) - a little electric car. But, SolarCity is offering to install a solar generation set-up to power it - which results in the car not running up your power bill.
So, not a bad idea, except that the solar set-ups start at around $9,999; and, the amount of sunlight the solar panel would get is probably a lot less than what they reckon it could get (so you might have to get a few more than they say).
But I really do like the idea of an electric car not using your electricity.