Tesla has released a new comparison report claiming Powerwall with solar is cheaper than a traditional backup generator. For years now, Tesla has enjoyed a giant backlog of Powerwall orders, but ...

Tesla's largest Supercharger at Harris Ranch is still powered by a diesel generator despite promises of renewable energy.

He said the unit attached to the Tesla appears to be a gas-powered generator. Luther directs a program at the university that uses technology to identify people in old photographs.

While most investors are focused on Tesla's electric cars, the company's fastest-growing product category is hiding in plain sight.