As of December 2020, the states with the most small-scale solar photovoltaic (PV) capacity were California (10.6 gigawatts (GW)), New Jersey (1.9 GW), and Massachusetts (1.8 GW). Of the 4.5 GW of small-scale solar capacity added in the United States in 2020, California accounted for 31%, the largest share by far. Although Texas and Florida have less total small-scale solar capacity than states such as California or New Jersey, capacity has grown rapidly in these states in recent years. In 2020, Texas added 422 megawatts (MW) of small-scale solar, and Florida added 282 MW. State incentives, strong solar resources, and policy changes are largely driving these gains.
New Jersey, New York, and Massachusetts are among the leading states for small-scale solar capacity despite having less favorable solar resources. In these states, long-standing state policies such as renewable and clean energy standards and other incentives, some of which include specific provisions for solar, have encouraged small-scale solar capacity growth.