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Eversource customers get access to Mass Save rebates up to $8,500, a discounted heat pump electric rate of $0.18/kWh (saving $55-$115/month), ConnectedSolutions battery payments of $275/kW, and the 0% HEAT Loan.
Last updated February 2026. Federal 25C tax credit EXPIRED Dec 31, 2025.
Eversource serves approximately 71% of Massachusetts electric customers, making it the largest utility in the state. If you receive your electric bill from Eversource, all of the programs below are available to you.
Boston, Cambridge, Somerville, Brookline, Newton
Quincy, Braintree, Weymouth, Hingham, Plymouth
Barnstable, Falmouth, Chatham, Provincetown
Framingham, Natick, Wellesley, Needham, Weston
Springfield, Pittsfield, Great Barrington, Greenfield
~71%
of MA electric customers
Mass Save rebates are administered through Eversource for customers in their territory. The tiers and amounts are set statewide.
Heat pump serves as primary heating source for the entire home.
Cap: $8,500 maximum
Heat pump supplements existing heating system.
Cap: $8,500 maximum
Single-zone or supplemental installation.
Cap: $2,500 maximum
Earned when your system is properly sized via Manual J load calculation. NuWatt includes Manual J at no additional cost.
Available when insulation or air sealing is completed within 12 months of your heat pump installation through Mass Save.
This is one of the biggest benefits of being an Eversource customer with a heat pump. The discounted electric rate saves you $55-$115 per month during heating season, significantly reducing your operating costs.
November 1 through April 30 (6 months)
Standard Rate
$0.30
/kWh
HP Rate
$0.18
/kWh
Monthly Savings
$55 - $115/month
$660 - $1,380 total over 6-month heating season
Have your heat pump installed by a qualified contractor
Call Eversource at 800-592-2000 or apply online
Provide installer invoice and equipment documentation
Eversource verifies installation (may require site visit)
Rate applies automatically each November through April
Key detail: The Eversource HP rate of $0.18/kWh is lower than National Grid's $0.19/kWh, and the savings are larger because Eversource's standard rate ($0.30/kWh) is also higher. Eversource customers benefit more from the heat pump rate than National Grid customers.
If you pair a home battery with your heat pump, Eversource's ConnectedSolutions program pays you to share stored energy during peak demand events. This is one of the highest demand response payments in the country.
$275/kW
June through September
13.5 kW Powerwall: 13.5 x $275 = $3,713/summer
$50/kW
December through March
13.5 kW Powerwall: 13.5 x $50 = $675/winter
A 13.5 kW home battery (like a Tesla Powerwall) can earn over $4,300 per year through ConnectedSolutions. Events are called 1-2 times per week during peak seasons. The battery discharges to the grid for 2-3 hours, then recharges from solar or the grid overnight. Your heat pump continues to operate normally during events.
Here is everything an income-qualified Eversource customer with a heat pump and battery can receive.
Mass Save Rebate (Whole-Home)
Applied at installation
Sizing + Weatherization Bonuses
$500 each
HP Electric Rate Savings
~$170/month x 6 months (Nov-Apr)
ConnectedSolutions (13.5 kW battery)
$275/kW summer + $50/kW winter
One-Time Incentives
$17,500
Annual Savings
$5,408+
Not included: Federal 25C tax credit ($0 -- expired Dec 31, 2025). All other incentives shown are current and available now.
Use this calculator to estimate your total Mass Save rebate based on your system size, tier, and income level. Results include bonuses and HEAT Loan estimates.
3 tons
0% interest. No payments first 3 months.
Estimates based on Mass Save 2026 program rates. Actual rebate determined at time of installation. Federal 25C tax credit expired Dec 31, 2025 — not included.
Note: Mass Save rebate tiers and amounts are the same for all MA utilities. This calculator shows the statewide Mass Save program. Eversource-specific benefits (HP electric rate, ConnectedSolutions) provide additional ongoing savings not reflected in the one-time rebate calculation above.
Call Mass Save at 866-527-7283 or contact NuWatt. A home energy advisor will assess your insulation, heating system, and heat pump sizing needs at no cost.
NuWatt provides a detailed proposal with Manual J sizing. We submit your Mass Save rebate application to lock in your rebate amount and set up your 0% HEAT Loan.
Professional installation of your cold-climate heat pump system. 1-3 days depending on system type. All equipment uses R-32 or R-454B refrigerant (qualifying for Mass Save).
After installation, we help you contact Eversource to enroll in the heat pump electric rate ($0.18/kWh). We provide the documentation Eversource requires for verification.
If you have a home battery, we help you enroll in ConnectedSolutions to start earning $275/kW in demand response payments during the next summer season.
Eversource administers the Mass Save heat pump rebates, which are the same statewide tiers available to all Massachusetts utilities: Whole-Home at $2,650/ton (max $8,500), Partial at $1,125/ton (max $8,500), and Basic at $250/ton (max $2,500). Additionally, Eversource offers the heat pump electric rate ($0.18/kWh Nov-Apr) and ConnectedSolutions battery incentives ($275/kW summer).
Eversource offers a discounted electricity rate of approximately $0.18/kWh for heat pump owners during heating season (November through April), compared to the standard residential rate of approximately $0.30/kWh. This rate applies to your entire household usage during those months once enrolled. Typical savings are $55-$115 per month depending on usage.
After your heat pump is installed, contact Eversource at 800-592-2000 or visit the Eversource website. You will need to provide proof of installation including your installer invoice, equipment model and serial numbers, and AHRI certificate. Eversource may schedule a verification visit. Once approved, the rate applies automatically each November through April.
ConnectedSolutions is Eversource demand response program that pays you for sharing stored battery energy during peak demand events (typically hot summer afternoons and cold winter evenings). If you pair a battery with your heat pump and solar system, you can earn $275 per kW of capacity in summer plus $50 per kW in winter. A 13.5 kW Tesla Powerwall could earn over $4,300 per year.
No. Eversource is one of the utilities that funds and administers the Mass Save program. The rebate tiers, amounts, and requirements are the same whether you are an Eversource or National Grid customer. The main Eversource-specific benefit is the heat pump electric rate, which offers a slightly larger discount than National Grid ($0.18/kWh vs $0.19/kWh).
Yes. The Eversource heat pump electric rate and solar net metering are separate programs that work together. Your solar panels generate net metering credits (especially in summer), and the heat pump rate reduces your winter electricity cost. Combined, these programs can reduce your annual energy costs to near-zero for an all-electric home.
No. The federal Section 25C energy efficiency tax credit expired on December 31, 2025, under the OBBBA legislation signed July 4, 2025. There is no federal tax credit for residential heat pump purchases in 2026. Mass Save rebates (up to $9,500 with bonuses) and the 0% HEAT Loan remain available through Eversource.
Mass Save provides up to $9,500 (rebate $8,500 + bonuses $1,000) now. The 0% HEAT Loan covers up to $25,000 of remaining costs. Ongoing savings include $1,020+/year from the heat pump electric rate and up to $4,300+/year from ConnectedSolutions if you have a battery.
NuWatt handles your Mass Save rebate application, HP electric rate enrollment, and ConnectedSolutions activation. We make sure Eversource customers get every dollar available.
Free assessment. NABCEP-certified. Serving all Eversource territory in Massachusetts.