The Southern California desert is now home to the world's largest solar power plant. U.S. Interior Secretary Sally Jewell joined state officials on Monday to open the 550-megawatt Desert Sunlight solar project in the town of Desert Center, Calif., near Joshua Tree National Park. Built by First Solar, the project generates enough electricity to power 160,000 average California homes. Desert Sunlight received a federal loan of nearly $1.5 billion. Money provided by the project's owners ... is also being used to fund $400,000 in improvements to the community center in nearby Desert Center. Desert Sunlight is the world's largest solar power plant, although only by a hair. The Topaz solar project in San Luis Obispo County, Calif. - which, like Desert Sunlight, was built by Arizona-based First Solar - also has a capacity of 550 megawatts. But the desert has more abundant sunlight than San Luis Obispo County, so Desert Sunlight will actually generate more electricity than Topaz, said Georges Antoun, First Solar's chief operating officer. California as a whole has installed more renewable energy than any other state, noted David Hochschild, a member of the California Energy Commission. There were a lot of skeptics who actually didn't believe that renewables could scale, that this cost reduction could happen, that we could introduce it to the grid," Hochschild said. "They've been proven wrong."