I do not like the idea of the grid sucking current out of my car's battery! The reason I plug it in, is to charge, and not provide electricity for others. I would be really pissed off the get in the car in the morning, rushing to get to work, and find out that my car can't get me there, because the batteries are empty. I'm strongly against this solution! <br><br>Google fixed problems like this in their data centers with flywheels. When they have power, they spin them to colossal speeds, and when the power goes out, they just keep spinning out of inertia, just like you mentioned with normal power plants. That would be a solution that I like.