Keep your oil, and keep the change!

[gill.lepage]

Wow, "2,000 TWh/year, about 10 per cent of the world electricity consumption!

http://www.engineerlive.com/features/19776/marine-energy-europe-is-leading-the-way.thtml

Also;

The “battery-stack problem” has been around for a long time.
http://www.edn.com/contents/images/6515356.pdf