Energy storage: The elusive key that could unlock future growth in renewables

Interesting analysis by Bloomberg on where energy storage is at right now. It's great to be able to produce lots of electricity from utility-scale solar fields and wind farms if it can be used immediately, but there's no place for energy companies to store it when they have a surplus in production. Industry analysts say there's a multi-billion bonanza for the companies that figure out how to do it on a grand scale.