The photovoltaic plant, located in Boulder City, is now generating enough emission-free electricity to power about 14,000 homes.

First Solar of Arizona supplied the panels and served as the engineering, procurement and construction contractor for the solar plant.

The power from this plant and the company’s adjacent 10MW El Dorado solar plant has been sold to Pacific Gas & Electric under separate 20-year contracts.

California utilities are required to procure 20% of their energy supply from alternative sources by the end of 2010, increasing to 33% by 2020.

Sempra Generation operates and maintains a fleet of natural gas-fueled power plants, and develops solar and wind facilities that serve US markets.