Katie Fehrenbacher of Fortune reports on Tesla's new grid batteries being produced at its heralded Gigafactory, a little ahead of schedule. 

The batteries, called Powerpack and Powerwall, were introduced earlier this year and pre-orders indicated high demand: There's already $1 billion worth in orders, according to the company, and they are already sold out for 2016. 

Previously Musk has estimated that just the grid battery orders could deliver between $40 million to $45 million in sales for the fourth quarter of this year. Sales for the battery business could be “ten times that number next year” — or presumably $400 million to $450 million in a quarter — after that.

Beyond next year, the business could reach “a few billion dollars in 2017,” Musk said earlier this year. “It’s sort of growing by a half order of magnitude to an order of magnitude per year.”
Discover more information about grid batteries at Fortune: 
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