Very interesting, thank you for posting this!<br>One issue about using electric cars to help balance the grid, is that those batteries have finite discharge and recharge abilities, so you're wearing them out by using them in that way. <br>Please correct me if I'm wrong!,(reply>), Another issue with using cars as batteries is that people will just unplug their cars at peak times so they don't lose any electricity then plug them in again at midnight when the electricity is cheap.