NRG Solar owns 51% of the project which will supply electricity for 230,000 homes in nearby California at peak capacity. MidAmerican Solar, a unit of MidAmerican Energy Holdings Company, is minority owner.
The project uses First Solar’s thin-film solar panels.
Pacific Gas and Electric is buying Agua Caliente’s power under a 25-year agreement.
The project received a $967m loan guarantee from the US Department of Energy.