The home battery, called the "Powerwall," is intended to store solar energy and enable customers to bank grid electricity from nonpeak periods and use it during peak times, saving money. It looks "like a beautiful piece of sculpture," Musk said. You can order it now, it's wall-mounted, and it comes in different colors.
Read more: http://www.businessinsider.com/here-comes-teslas-missing-piece-battery-announcement-2015-4#ixzz3YuH8OtS4
"What we call learning is only a process of recollection." PLATO