Tesla’s Gigafactory, a $100 Billion Boon to Nevada

The new Tesla Motors factory being built outside Sparks, Nev., was already on tap to produce 500,000 electric car batteries and become the largest battery factory in the world when chief executive Elon Musk announced last month it would also produce the potentially revolutionary home battery, the Powerwall.

Its biggest energy boost, however, could be to Nevada’s economy, with the state estimating a $100 billion impact over the next 20 years.