The new Next 10/Beacon Economics study shows different parts of the state excelled in different aspects of solar generation.
Riverside, San Bernardino and Ontario produced the most total commercial and residential solar power. Fresno topped the list of areas with industrial solar power production.
Noel Perry is founder of the research company Next 10. He says California continues to lead the nation in new solar capacity and in other green energy production sectors.
"Another area that's really important where we continue to lead is clean tech investment and patents. Once again, the most amount of clean technology investment has been in California compared with all the other states."
The study shows Sacramento and Roseville combined are in the top third in the state for residential solar capacity, clean vehicle rebates and clean tech patents.