The funding is part of an initiative called SunShot, which was launched in early 2011 to make solar electricity cheap to produce and therefore competitive against energy from coal or natural gas power plants.
Fuel cells make hydrogen and oxygen react together to produce water and electricity in the reverse of the process that the Icelanders propose to use to make the hydrogen in the first place.
Kempton's group needs to sort out some thorny issues, like how to make sure that enough parked cars are available to produceelectricity when the utilities need it and that car owners aren't stranded with a depleted battery.