US Solar Power Plants

Utility-scale solar plants in the United States hold 184.3 GW of nameplate capacity across 7,509 plants as of August 2026, 13.1% of all US generating capacity. That is what the equipment could produce running flat out, not what it generated, and rooftop solar is reported separately and not counted here. Plant counts run down to sub-megawatt units, so capacity rather than the number of plants is the measure of size.

At least some utility-scale solar capacity is listed in 50 places, but half of the national total sits in just four states. Texas leads with 35,889 MW, 19.5% of the national total and 17.5% of Texas's own capacity, followed by California at 31,672 MW (17.2%), Florida at 13,997 MW (7.6%) and Arizona at 11,154 MW (6.1%). California counts 968 plants against Texas's 242, so more plants does not mean more capacity.

The largest single plant is Gemini Solar Hybrid in Nevada at 1,070 MW, first online in 2024, followed by Bellefield Solar and Energy Storage Farm in California at 1,000 MW and Green River Energy Center - Hybrid in Utah at 800 MW. The oldest solar plant still listed is Princeton University Cogeneration in New Jersey, online since October 1996; the newest, Lake Iris Solar Project in Michigan, came online in August 2026.