[David]

Wind can be huge. It's been as high as 18% of the demand in Texas and there's more installed capacity there just isn't enough transmission capacity. Granted this was around midnight when wind peaks and demand drops, but I've seen it almost as high in the middle of a cool Texas day.

The point is, we have excess capacity at night when electric cars would charge. The only issue is that the peak is 5pm when people come home from work. If everyone plugged in their car at 5pm along with turning on the A/C or heat it would be a problem. Smart meters and variable rates would solve much of that problem though.