Available Commonwealth Solar Hot Water Program Funding (July 2020 - present)

Available Budget $750,000.00
Committed Awards $348,884.75
Estimated Remaining Funding $401,115.25

-Funding Table updated on November 14, 2020.

-MassCEC will continue to accept applications until all program funding has been awarded or at the end of 2020, whichever comes first.


MassCEC’s Residential- and Small-Scale Solar Hot Water program provides rebates for the installation of solar hot water (SHW) systems at homes across Massachusetts. This program is part of MassCEC’s suite of Clean Heating and Cooling programs, which support technologies that provide customer cost savings and environmental benefits while maintaining a high level of comfort and reliability.

Rebates are available to customers for new or existing single-family homes or buildings that receive electrical service from National Grid, Eversource, Unitil, and participating municipal lighting plant communities.

In the interest of increasing access to clean energy to all residents of Massachusetts, MassCEC offers additional incentives for households with incomes below 120% of state median income. Learn more about the Income-Based Rebate Adder here.

Homeowners should first select their installers, who will submit the rebate application on their behalf. MassCEC maintains a list of installers who have previously participated in the program. 

MassCEC recommends that residents:

  • Solicit proposals from at least three installers.
  • Check references from prior installations and ask the questions listed on our Finding an Installer webpage.

Prior to deciding to move forward with a system, residents who may meet income criteria should determine if they are eligible for the Income-Based Rebate Adder, as described in the Program Manual. For example, a household of four with annual income of $143,692 or less may qualify. 

Once the resident selects an installer, and is ready to move forward with the project, the installer should: 

  1. Complete the system design.
  2. Apply for the rebate on your behalf and help you apply for other financial incentives.
    • Information on additional SHW incentives can be found on our Learn About SHW page. 
    • The homeowner must provide the installer with a signed Participant's Agreement and an electric bill, as well as other information about the project site. 
    • The homeowner must schedule a free Mass Save Home Energy Assessment to take place within the next six months if they have not within the past four years. 
    • MassCEC must approve the rebate award before installation begins. 
  3. Once MassCEC issues an award letter, the installer may complete the system installation within nine months of the award approval date.
  4. Once the project is complete, the installer submits documentation verifying the project is complete.
    • MassCEC may schedule an inspection prior to payment to ensure installation quality. 
    • Once complete, MassCEC will issue the rebate payment. 

Payment will typically be issued within four to six weeks of the time the documentation is received.

Please read the Program Manual for full details on eligibility, program requirements, and rebates. Installers looking to participate in the program or apply on behalf of homeowners should visit the installer page.


How much will my rebate be?

Homeowners are eligible for a base rebate amount up tpo $2.000. High rebate amounts are available for homeowners who earn less than 120% of the State Median Income. The system may also be eligible to receive additional funding (“adders”) which increase the amount of the rebate. Adders are detailed in the Program Manual

Why isn’t everyone in Massachusetts eligible for this rebate program?

Projects receiving rebates through MassCEC must be located in a utility territory that contributes funding to the Renewable Energy Trust (RET), which includes communities served by investor owned electric utility companies or a participating municipal light plant.

What is an MLP and where are they?

MLP stands for “municipal light plant” and refers to communities who are serviced by a publicly owned local utility instead of an investor-owned electric company, such as National Grid or Eversource. Some of these MLP communities contribute to the RET, which is the original source of our funding for rebates. We are unable to provide rebates to MLP communities that do not contribute to the RET.

MassCEC has authorized $10 million in funding for the Commonwealth Solar Hot Water Program from 2012 through 2020.

Please click here to download the residential solar hot water projects database.


For questions on the Residential SHW Program, please contact us at solarhotwater@masscec.com or (617) 315-9300.