There is a TED talk from the recent Long Beach TED conference presented by Donald Sadoway, PhD of MIT. Dr, Sadoway looked at the issues around electrical storage. His goal was to us common materials, readily available, easy to fabricate and requiring little or no maintenance. Sadoway invents to the price point of the electric utility market. so the results are quickly and easily deployed responding to immediate needs delivering immediate economic benefits. All this meets his mantra "We'll invent our way out of this economic downturn."