The Antelope Valley Solar Ranch 1 (AVSR1) is a 230 megawatt (MWAC) photovoltaic power plant near Lancaster within Antelope Valley, in the western Mojave Desert, Southern California.

It uses cadmium telluride modules made by the US thin-film manufacturer First Solar.

[1] In September 2011, the U.S. Department of Energy issued a $646 million loan guarantee to support the project's construction.

[8] The plant will use approximately 3.8 million solar panels,[6] about 20% of which will be mounted on single-axis tracking racks.

[1] When fully operational, the plant is expected to generate enough energy for 75,000 homes, displacing 140,000 tons of CO2.