Mass Save 2025 Annual Impact Report details how Mass Save programs led to energy savings, expanded access to energy efficiency, and advanced Massachusetts climate goals

BOSTON, MA. (March 31, 2026) – The Sponsors of Mass Save^® today released the Mass Save 2025 Annual Impact Report, which details how Mass Save programs continued to deliver measurable customer savings, expand equitable access to energy efficiency programs, and advance Massachusetts climate goals during the first year of the Massachusetts 2025-2027 Energy Efficiency and Decarbonization Plan term.

In 2025, Mass Save programs delivered over $3.6 billion in total benefits to residents and businesses across Massachusetts. These programs led to direct bill savings for participants while supporting grid reliability during periods of peak demand, strengthening building resilience, and improving comfort in homes, businesses, and municipal buildings like K-12 schools. By enhancing energy efficiency statewide, the Sponsors have lowered overall demand to manage long-term system costs, reduce fuel and operating expenses, and defer infrastructure investments while simultaneously supporting thousands of clean energy jobs.

Key advancements and highlights of Mass Save programs in 2025 include:

• 52,000 homes and 14,800 rental units weatherized
• Installation of heat pumps in 31,700 homes and 3,700 rental units
• 209 MW in summer demand savings
• 3.98 million lifetime metric tons of carbon dioxide equivalent (CO2e) emissions deferred, approximately the same as removing 900,000 gasoline-powered passenger cars from the road for one year
• 52.6 million MMBtu in net lifetime energy savings across all fuel types, equal to the annual energy use of 500,000 homes in the United States

The Sponsors also advanced efforts to make energy efficiency programs more accessible to everyone, investing $450 million to reduce barriers to participation and ensure that the benefits of Mass Save programs are broadly shared across the state. In order to do that, the Sponsors:

• Made Decarbonization Consultations available in Spanish and Portuguese as well as additional languages through a translation service, reaching audiences that may not have participated in Mass Save programs prior to 2025
• Provided funding and support services through 26 Mass Save Community Education Grants, including 10 which support Designated Equity Communities, to increase energy-efficiency education and program participation
• Launched the Municipal Energy Manager Grant, providing funding and support for 24 energy managers serving 63 communities to help save energy and money and cut carbon emissions in municipal buildings
• Expanded the Community First Partnership to support 58 communities; 2025 outreach efforts reached an estimated 3 million residents generated more than 10,000 leads, and expanded access for customers who prefer to be served in a language other than English

“Mass Save programs deliver substantial benefits to people throughout the state, showing that investment in energy efficiency continues to improve the accessibility and affordability of these solutions,” said Tilak Subrahmanian, Vice President of Energy Efficiency and Electric Mobility at Eversource. “Ongoing collaboration between the Sponsors, state-level leadership, and municipalities statewide will allow residents and businesses to realize a more affordable and cleaner energy future for years to come.”

“Our work to engage with people in cities and towns throughout Massachusetts continues to pay dividends, with Mass Save programs delivering benefits each and every day,” said Amy Vavak, Director, Customer Energy Management, Massachusetts at National Grid. “Whether completing weatherization projects, installing heat pumps, or connecting people with available incentives, the Sponsors remain committed to providing an accessible, affordable energy future for everyone in the state.”

As part of concerted efforts to make Mass Save programs simple and easy to participate in, the Sponsors:

• Launched the Mass Save Solutions Center, a one-stop shop for customers featuring specialists on topics that include signing up for a Home Energy Assessment to contacting a contractor
• Established the Heat Pump Leaders Network, a group of 70 higher tier contractors committed to following leading business practices and providing enhanced services for customers
• Began new end-to-end project services and increased incentives for eligible homeowners, renters, landlords and small businesses, allowing customers to receive project support for heat pumps, electrical panel upgrades, and pre-weatherization work

“All Bostonians benefit from Mass Save energy efficiency programs,” said Oliver Sellers-Garcia, Commissioner of the Environment Department in the City of Boston. “Investments in affordable clean energy solutions advance our climate goals, and ensure that every neighborhood benefits from lower energy bills and cleaner air. By partnering with the Sponsors, we’re looking forward to bringing efficient energy solutions to our city through the City’s Boston Energy Saver program and Mass Save incentives and programs.”

To read the full Mass Save 2025 Annual Impact Report, please visit MassSave.com/2025AnnualImpact.

To learn more about the Massachusetts 2025-2027 Energy Efficiency and Decarbonization Plan, please visit www.masssave.com/community/2025-2027-three-year-plan.

About Mass Save^®

Mass Save^® is a collaborative of Massachusetts’ electric and natural gas utilities and energy efficiency service providers including Berkshire Gas, Cape Light Compact, Eversource, Liberty, National Grid, and Unitil. We empower residents, businesses, and communities to make energy efficient upgrades by offering a wide range of services, rebates, incentives, trainings, and information. 

We respectfully ask that Mass Save is referred to as “the Sponsors of Mass Save,” or “the Mass Save Sponsors,” to reflect the participation of all utility and energy efficiency service providers within the collaborative.