The 110-megawatt Crescent Dunes Solar Energy Facility in Nevada is the first utility-scale concentrating solar plant that can provide electricity whenever it's needed most, even after dark. Credit: SolarReserve

The 110-megawatt Crescent Dunes Solar Energy Facility in Nevada is the first utility-scale concentrating solar plant that can provide electricity whenever it’s needed most, even after dark.
Credit: SolarReserve

Deep in the Nevada desert, halfway between Las Vegas and Reno, a lone white tower stands 195 meters tall, gleaming like a beacon. It is surrounded by more than 10,000 billboard-size mirrors focusing the sun’s rays on its tip. The Crescent Dunes “concentrating solar power” plant looks like some advanced communication device for aliens. But the facility’s innovation lies in the fact that it can store electricity and make it available on demand any time—day or night.

Crescent Dunes, the flagship project of Santa Monica–based firm SolarReserve, has achieved what engineers and proponents of renewable energy have struggled with for decades: providing cheap, commercial-scale, non–fossil fuel electricity even when winds are calm or the sun […]