Electric cars could act as batteries for the energy grid

http://environment.newscientist.com/channel/earth/energy-fuels/dn13000-electric-cars-could-act-as-batteries-for-the-energy-grid-.html

Electric and hybrid cars could act as energy stores for the power grid while not being driven.

Scientists from the University of Delaware are using a new prototype made by US company AC Propulsion to store or supply grid electricity when required.

Combustion-powered cars are useless while off the road, but all-electric and plug-in hybrid vehicles could act as backups to the grid while idle, using a system developed by Kempton and colleagues called V2G (vehicle-to-grid).