This new Tesla battery will power your home, and maybe the electric grid too

Tesla is working on a battery that can power your home and even help large-scale utilities store energy more efficiently, according to company chief executive Elon Musk. On an investor call Wednesday, Musk said the designs for a home or business battery are already complete and will likely be unveiled to the public "in the next month or two." Production could be as little as six months away, he added.

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