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CSI Thermal Program

California Solar Initiative
CSI-Thermal Program

Rebates are available for Solar Water-Heating Systems

The CSI-Thermal Program offers cash rebates of up to $2,719 for solar water heating systems on single-family homes. Multifamily and Commercial properties qualify for rebates of up to $500,000. Save money on gas or electricity bills by harnessing the heat of the sun!

Funding for the CSI-Thermal program comes from ratepayers of PG&E, SCE, SoCalGas, and SDG&E. The rebate program is overseen by the California Public Utilities Commission as part of the California Solar Initiative.

Find out if you qualify

How much you'll save

Rebates vary depending on the type of solar water heating system, location, shading and other design factors. A typical homeowner with a solar water heating system displacing natural gas can expect a rebate of about $2,200 at the initial incentive level. Rebates for electric-displacing systems are around $1,400 for the average system. Eligible low-income natural gas customers may qualify for higher incentives under the Low Income Program. Incentives will decline over time as the program meets certain benchmarks, so customers are encouraged to apply for their rebate early. To learn more about how much you will save, check the solar events calendar for a free solar hot water information class in your utility area.

Finding an Eligible Solar Thermal Contractor

Contractors and self-installers must become eligible to participate in the CSI-Thermal Program by taking a one-day training class offered by the CSI-Thermal Program Administrators. A listing of all eligible CSI-Thermal Solar Water Heating Contractors is provided for consumers.

Your solar water heating contractor will complete and submit the incentive application paperwork for you.

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