CSI Thermal Workshop Mandatory for Solar Thermal Installers and Contractors

Attention Solar Thermal Installers.

Solar Thermal Installers

Attention solar thermal installers and contractors!

The CSI Solar Thermal Program (Solar Water Heating) offers incentives to displace electric, propane and natural gas for residential, multifamily and commercial properties with solar water heating systems. The CSI Solar Thermal Workshop is mandatory for contractors and self—installers interested in participating in the CSI Thermal Program.

Find the workshop near you.

Note: This is not an instructional class on how to install solar water heating systems.


Completion of this course by the licensed contractor license as listed with the California State License Board (CSLB) is mandatory to participate in the CSI—Thermal Program.

Installation contractors must have an active A, B, C—4, C—36 or C—46 license.


To attend one of the sessions offered, you must email [email protected] with the following:

  1. Business licenser number
  2. List of attendees and email address
  3. Role of additional attendees e.g. president, owner, lead installer, etc.

California Solar Initiative CSI-Thermal Program

Rebates are available for Solar Water-Heating Systems

The CSI-Thermal Program offers cash rebates of up to2,045.13€ for solar water heating systems on single-family homes. Multifamily and Commercial properties qualify for rebates of up to 376,081.23€. 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 about1,654.76€ at the initial incentive level. Rebates for electric-displacing systems are around 1,053.03€ 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 eventscalendar 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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