Data Source: American Community Survey, U.S. Census Bureau. Analysis by CEC Economics
Highlights
  • Solar heating adoption varies considerably across counties in California, with several small counties by population punching above their weights. In 2023, Alpine County had the highest adoption rate (4.9%), but since it is such a small county, its impact on the state is miniscule. Other small counties with notable solar adoption rates include Glenn County (2.6%), Colusa County (2.5%), and Amador County (2.3%).
  • Several counties in the Central Valley, the heart of California’s agricultural economy, also had notable solar adoption rates at or above two percent. These counties include Fresno County (2.8%), Madera County (2.7%), Yuba County (2.2%), Yolo County (2.1%), and Kern County (2.0%). Solar heating cuts across the urban-rural divide and region.