Not satisfied with just revolutionizing the automobile market, Tesla Motors has thrown down the gauntlet on home energy. Powerwall [$5,000 – with a DC-AC inverter]  is a home battery that charges using electricity generated from the sun by solar panels, or it can charge using conventional electricity when utility rates are low, and power your home when the rates are higher. Power companies often charge a higher price for electricity during peak evening ). It also keeps you out of the dark during power outages.. Powerwall offers independence from the utility grid with the security of an emergency backup. Current home batteries are bulky and costly. In contrast, Powerwall’s lithium ion battery inherits Tesla’s proven automotive battery technology to power your home safely and economically. Completely automated, it installs easily and requires no maintenance.

Check it out: Tesla Motors