More than 300,000 individually computer-controlled mirrors. Three 459 foot tall towers topped with solar boilers at 1,000 degrees Fahrenheit. 392 megawatts of Power. The Ivanpah Solar Electric Generating System has gone live, a huge solar power plant built by BrightSource with backing from Google, NRG, and others, set to provide clean energy to 140,000 homes. For all its advanced technology, though, Ivanpah may be more important as a gateway to even more advanced solar energy projects.