Topaz Solar Farm is a 550-megawatt (MW) photovoltaic power station in San Luis Obispo County, California. Construction on the project began in November 2011 and ended in November 2014. It is the world’s largest solar farm. The $2.5 billion project includes 9 million CdTe photovoltaic modules based on thin-film technology, manufactured by U.S. company First Solar. The company also built, operates and maintains the project for MidAmerican Renewables, a Berkshire Hathaway Company. Pacific Gas and Electric will buy the electricity under a 25-year power purchase agreement. According to First Solar, it created about 400 construction jobs.