The CSI-Thermal Program provides incentives to offset the cost of installing solar water heating systems in California. Whether you're an industry veteran or just beginning to consider a self-installation, this section will equip you with the knowledge and tools needed to help usher in the next solar water heating revolution!

About the CSI-Thermal Program

Learn about the CSI-Thermal Program and rebate application process.

Solar Water Heating Education & Technical Resources

Build your knowledge of solar water heating systems and technology applications.

Become an Eligible Contractor

Follow these steps to become an eligible contractor or self-installer.

Upcoming Events

Join CSE at a future workshop or training.

CSI-Thermal Installer Toolkit

Access application process tutorials, permitting resources, technical guides, marketing tools and other helpful resources.

Frequently Asked Questions

Have a question? Check out the FAQs or contact us directly.