The California Solar Initiative – Thermal Program is scheduled to sunset on July 31, 2020. At that time, no new residential, commercial or multifamily applications will be accepted. For questions about the incentive or application deadline, we encourage you to contact CSE’s solar thermal team via email.

Contact Us

The California Solar Initiative–Thermal Program is no longer accepting new incentive applications. If you are a contractor or property owner with a project in review or due payment, refer to the Active Applicants page.

The Center for Sustainable Energy continues to administer the CSI-Thermal program through the duration of its sunset period through Oct. 31, 2024.

If you have a home, own a business or install solar thermal systems in the San Diego region, feel free to complete the contact form below or email us at

Questions in Other Service Territories?

While CSE administers the CSI-Thermal Program for SDG&E, the other investor-owned utilities administer the program in their respective territories. If you have questions about projects in one of their service territories, please contact them directly.

Pacific Gas and Electric (PG&E)
(877) 743-4112

Southern California Gas Company
(800) Gas-2000

Southern California Edison
(866) 584-7436

Customer Service