That idea occurred to lots of people. There is a popular internet newsgroup of people who have been adding batteries to their Toyotas & plugging them in at night. The electric is alot cheaper than the gasoline. Such is the standard in different countries like Japan.
The greens & the EPA have their panties in a bunch over this. They have tried many ways to stop it. They are upset because it means than coal gets burned to power the cars.
"The greens & the EPA have their panties in a bunch over this. They have tried many ways to stop it. They are upset because it means than coal gets burned to power the cars."
Oh, that's easily solved; more nukes!
:D