Eversource Energy Energy Rebates
Eversource Energy is one of the largest utilities in New England, serving approximately 4.4 million electric and gas customers across Connecticut, eastern Massachusetts, and New Hampshire. Eversource administers some of the most generous energy efficiency rebate programs in the country, particularly through its participation in Mass Save in Massachusetts. Eversource customers across all three states have access to substantial rebates for heat pumps, insulation, heat pump water heaters, and smart thermostats. In Massachusetts specifically, Eversource is a sponsor of Mass Save, which offers rebates of up to $10,000 for qualifying whole-home heat pump installations and covers 75-100% of insulation costs. New England's cold winters and increasingly warm summers make these energy efficiency programs especially valuable for controlling year-round energy costs. See all Massachusetts energy rebates, Connecticut energy rebates, and New Hampshire energy rebates for state-specific details.
Service area: Connecticut (electric), eastern Massachusetts (electric and gas), and New Hampshire (electric) — approximately 4.4 million customer accounts across three states
These amounts were last checked against the utility's own website on .
Mass Save Residential Rebates (Massachusetts)
In Massachusetts, Eversource is a lead sponsor of Mass Save, one of the most comprehensive and well-funded energy efficiency programs in the United States. Mass Save offers exceptionally generous rebates for heat pumps, insulation, heat pump water heaters, and other energy-saving improvements. The program provides no-cost home energy assessments, covers 75-100% of insulation costs, and offers rebates of up to $10,000 for whole-home heat pump conversions. Mass Save is available to all Eversource electric and gas customers in Massachusetts.
| Equipment | Rebate Amount | Details |
|---|---|---|
| New Hampshire, Home Energy Performance | Up to $6,000 | Whole-home incentive for insulation and air sealing, not itemised per appliance. |
| New Hampshire, 0% energy efficiency loan | Up to $15,000 | Covers insulation, air sealing, HVAC and water heating. |
| Connecticut, Home Energy Solutions assessment | $40 copay since 1 April 2026 | No longer free. Eversource publishes no dollar figures for Connecticut rebates. |
Eversource Residential Rebates (Connecticut and New Hampshire)
Outside of Massachusetts, Eversource offers state-specific residential energy efficiency rebate programs in Connecticut and New Hampshire. While the specific rebate amounts and qualifying equipment may differ from Mass Save, these programs still provide meaningful incentives for heat pumps, insulation, smart thermostats, and other efficiency improvements. Connecticut's Energize CT program and New Hampshire's NHSaves program are the umbrella initiatives through which Eversource delivers these rebates.
Official Program PageHow to Apply for Eversource Energy Rebates
The application process varies slightly depending on which state you are in. Here is a general guide:
- Schedule a Home Energy Assessment: In Massachusetts, schedule a free Mass Save home energy assessment. In Connecticut and New Hampshire, contact Eversource to arrange a home energy audit through the respective state programs (Energize CT or NHSaves). These assessments identify the best improvements for your home and are often required before rebates are issued.
- Review Your Assessment Report: After the energy assessment, you will receive a detailed report with prioritized recommendations and the specific rebates available for each improvement. In Massachusetts, the assessor may also arrange insulation work directly through a Mass Save insulation contractor.
- Select a Participating Contractor: For heat pumps and HVAC work, choose from the network of participating contractors associated with your state's program. In Massachusetts, this means a Mass Save registered heat pump installer. Using a participating contractor streamlines the rebate process.
- Complete the Installation: Have the qualifying equipment installed. Your contractor should handle the rebate paperwork in many cases, especially for Mass Save projects in Massachusetts.
- Submit or Confirm Your Rebate Application: Depending on the state and program, your contractor may submit the rebate application on your behalf, or you may need to submit it online. Visit masssave.com (MA), energizect.com (CT), or nhsaves.com (NH) to check your application status or submit documentation.
- Receive Your Rebate: Approved rebates are typically issued within 4-8 weeks as a check or bill credit, depending on the program and state.
Stacking with Federal Rebates
Utility rebates from Eversource Energy can typically be combined with the federal HOMES and HEAR rebates, but those are run state by state and most states have not launched them, so in much of the country there is currently nothing federal to combine with. This means you could potentially receive both a utility rebate and a federal rebate for the same improvement. Use our calculator to estimate your total savings.
Frequently Asked Questions
What is Mass Save and how does it relate to Eversource?
Mass Save is a collaborative energy efficiency initiative sponsored by Massachusetts's major utilities, including Eversource, National Grid, Unitil, and Cape Light Compact. It is funded through a small charge on utility bills and offers some of the most generous energy efficiency incentives in the country. As a Mass Save sponsor, Eversource customers in Massachusetts have access to the full suite of Mass Save rebates, including no-cost home energy assessments, 75-100% insulation coverage, and heat pump rebates up to $10,000.
Can Eversource customers in Connecticut and New Hampshire access Mass Save rebates?
No, Mass Save is a Massachusetts-only program. Eversource customers in Connecticut access rebates through the Energize CT program, and New Hampshire customers access rebates through NHSaves. While these programs also offer meaningful incentives for heat pumps, insulation, and other improvements, the rebate amounts and program structure differ from Mass Save. Each state has its own energy efficiency mandate and funding mechanism.
Are the Mass Save heat pump rebates really up to $10,000?
Yes, Mass Save offers rebates of up to $10,000 for whole-home heat pump conversions where the homeowner completely replaces their fossil fuel heating system (oil, gas, or propane) with a qualifying cold climate heat pump system. The exact rebate amount depends on the system size, efficiency, and whether the existing fossil fuel system is fully decommissioned. Partial conversions and supplemental heat pump installations qualify for lower but still substantial rebates.
How does Eversource's insulation program work?
In Massachusetts, after a no-cost Mass Save home energy assessment identifies insulation needs, Mass Save covers 75% of insulation costs for most homeowners (100% for income-qualifying households). A Mass Save insulation contractor handles the work. In Connecticut and New Hampshire, similar programs exist through Energize CT and NHSaves, though the cost coverage percentages may differ. The key first step in all three states is scheduling the home energy assessment through Eversource or the relevant state program.