CSI-Thermal Rebate Program

Investing in a solar water heating system for your business or multi-family property is a smart choice to save money on your natural gas bill. It also reduces your impact on the environment and is a more affordable way to go green than other renewable technologies.

How Does Solar Water Heating Work?

Solar water heating works alongside your current water heater. It collects energy from the sun to preheat water for sinks, showers, baths, dishwashers and washing machines. This reduces the amount of conventional energy needed to heat water for your business property — and saves you money on your energy bill.

Who Benefits from the Program?

The CSI-Thermal Program offers cash rebates for business customers who install a solar water heating system on their business or multi-family property to help off-set some of the upfront cost. The system must be used for the following:

  • Domestic hot water heating, including food preparation, cleaning, laundry, sanitation and personal use
  • Commercial process heat for industrial uses
  • Solar cooling systems
  • Non-residential pool heating systems
  • Combination systems using any of the above


PG&E is offering cash rebates of up to $500,000, granted in the form of a one-time payment. The amount is determined by how much energy the system is expected to displace annually. Higher incentive are available for qualifying low-income multi-family properties.

Rebates decline over time, so the earlier you apply, the higher the rebate you are eligible to receive. Act now to take advantage of this incentive program, because it is paying the highest value.

Eligibility Requirements

To apply for the CSI-Thermal program, your home must meet all of the following requirements:

  • Hot water in the business or multi-family property must be currently heated by PG&E's gas service
  • The solar water heating system must be installed on a business or multi-family property
  • The installed solar water heating system must be certified by the Solar Rating and Certification Corporation (SRCC) or the International Association of Plumbing and Mechanical Officials (IAPMO)
  • The solar water heating system must be installed by an eligible contractor.

Is Solar Water Heating Cost Effective?

After the initial installation cost, a solar water heating system can reduce your monthly heating bills by 50 to 80 percent. Over time, the energy and cost savings can be substantial.

To help reduce the up-front investment cost, look into a Federal Tax Credit and discuss other potential rebates and financing with your contractor.


See How Businesses Benefit from Solar Water Heating

Contact Us

  • Email:

    Solar Customer Service Center

    Mailing Address
    PG&E Solar and Customer Generation—CSI
    PO Box 7433
    San Francisco, CA 94120

    Street Address
    PG&E Solar and Customer Generation—CSI
    245 Market St., MC N7R
    San Francisco, CA 94105-1797

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