Tesla Elson Musk new battery http://www.theguardian.com/technology/2015/may/07/teslas-batteries-could-be-bigger-business-than-electric-cars-elon-musk

Tesla's batteries could be bigger business than electric cars – Elon Musk

Tesla CEO says demand for energy storage systems has been overwhelming, after 38,000 Powerwall units ordered since product was announced

 Tesla’s Powerwall home battery unit, which is now sold out until mid-2016. Photograph: Patrick Fallon/Reuters