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Get a Free QuoteCalculate the complete cost to electrify your Massachusetts home — solar panels, heat pump, battery backup, and EV charger. See Mass Save rebates, SMART program income, net metering savings, and ConnectedSolutions revenue. Get your net cost and estimated payback period in under 60 seconds.
$8,500
Mass Save HP rebate, 2026
$0.03/kWh
SMART 3.0, 20 years
$0.36–$0.48
all-in rate by utility
$6.23
heating oil/gal (Oct 19, 2026)
Customize for your Massachusetts home
Typical for 2,000 sq ft: ~374 gallons at $6.23/gal (Oct 19, 2026).
All-in residential rate: $0.38/kWh
Net Cost
$39,099
after rebate & tax credit
Monthly Savings
$452
first-year average
Annual Savings
$5,426
first year, all sources
Payback Period
7.3 yrs
estimated
These estimates are based on Massachusetts averages. Your home assessment will provide exact costs, incentives, and financing options.
Get Free AssessmentOr call 877-772-6357
Solar (10 kW system)
12,000 kWh/yr, sized from home size
Heat Pump (3.3-ton whole-home)
Cold-climate, replaces oil
Mass Save Heat Pump Rebate
$2,650/ton x 3.3 tons (cap $8,500) for 2026 installs; $2,350/ton (cap $7,500) from Jan 1, 2027
MA State Tax Credit
Claimed when you file: 15% of solar cost, up to $1,000 per principal residence
Paid over time (counted in your savings, not your net cost)
SMART 3.0 Income (20yr)
$0.03/kWh on ~12,000 kWh/yr (~$360/yr)
Equipment costs reflect March 2026 Massachusetts installed-price assumptions. Electricity rates are each utility's current all-in residential rate; oil and propane are DOER's Oct 19, 2026 statewide averages and gas is National Grid R-3B, winter 2025–26 delivery + supply. Savings assume today's rates with no escalation, value solar at your all-in rate (net metering credits on exported power exclude the customer charge and efficiency charges), and assume your yearly electricity use is at least your solar production. Sizes are preliminary rules of thumb from square footage; a load calculation sets the real heat pump and solar size. Mass Save rebates subject to program rules and available funding. Federal 25D ITC expired December 31, 2025.
Whole-home electrification means replacing every fossil fuel system in your home with a high-efficiency electric alternative — and then powering those systems with rooftop solar. It is the single most impactful decision a Massachusetts homeowner can make to reduce energy costs, eliminate carbon emissions, and protect against volatile fuel prices.
A fully electrified Massachusetts home typically includes four core components: rooftop solar panels to generate clean electricity, a cold-climate heat pump for heating and cooling (replacing oil, gas, or propane), a battery storage system for backup power and demand response revenue, and a Level 2 EV charger to charge your electric vehicle with solar electricity.
The economics depend heavily on what you heat with today. Massachusetts has some of the highest electricity rates in the country ($0.36-$0.48/kWh all-in, depending on your utility), which makes every kWh of solar valuable. With heating oil at $6.23 per gallon (MA DOER weekly survey, Oct 19, 2026), a heat pump costs less to run than an oil system; against natural gas at about $2.56 per therm it costs about the same, so solar does most of the work. Massachusetts also lets you stack several incentives: Mass Save rebates, SMART, ConnectedSolutions, net metering, and a state tax credit.
Heating Oil
Up 45% since Oct 2023
$6.23/gallon
~$2,220/yr
Natural Gas
National Grid, winter 2025–26
$2.56/therm
~$1,110/yr
Propane
Up 7% since Oct 2023
$3.80/gallon
~$1,690/yr
Electric Baseboard
Eversource Eastern MA all-in rate
$0.38/kWh
~$970/yr
Yearly cost for DOER's average Massachusetts home heated with each fuel, at today's price. Oil and propane: MA DOER weekly survey, Oct 19, 2026.
Eversource (Eastern MA)
Boston metro, South Shore, MetroWest
Eversource (Western MA)
Western Massachusetts
National Grid
Central & Western MA: Worcester, Springfield, Berkshires
Unitil
North-central MA: Fitchburg area
Cape Light Compact
Cape Cod & Martha’s Vineyard (Eversource delivery)
High rates = high solar savings. Solar you use yourself avoids most of your utility's rate; exported power earns net metering credits worth somewhat less. All-in residential rates at 600 kWh/month, effective Aug 2026–Oct 2026.
Massachusetts homeowners face rising fuel costs and some of the highest electricity rates in the nation. DOER's weekly survey puts heating oil at $6.23 a gallon, up 45% from the same week in 2023, while propane is up 7% at $3.80. At the same time, all-in electric rates run from $0.36/kWh to $0.48/kWh depending on your utility.
A cold-climate heat pump moves heat rather than making it. In metered Massachusetts and Connecticut program homes, whole-home systems delivered about 2.61 units of heat for every unit of electricity over a full heating season, including defrost and backup heat. On Eversource's winter heat pump rate, that makes a heat pump cheaper to run than oil ($6.23/gal), propane ($3.80/gal), or electric baseboard heat, and about the same as natural gas, where DOER cautions that switching fuels does not automatically save money. Pairing the heat pump with solar offsets much of its added electricity.
Three programs shape the math in 2026: Mass Save offers $2,650/ton for whole-home heat pumps (up to $8,500 for 2026 installs) plus 0% HEAT Loans. SMART 3.0 pays $0.03/kWh ($0.06 for qualifying low-income households) for 20 years on new residential solar in Eversource, National Grid, and Unitil territory. And ConnectedSolutions pays $275 per kW of average battery output during summer events, with that rate locked for 5 summers.
A residential solar installation in Massachusetts costs approximately $3.10/watt installed in 2026. System sizes for electrification range from 8 kW (small home, existing gas heat) to 14 kW (large home, oil heat + EV). A typical 10 kW system runs approximately $31,000 before incentives and produces about 12,000 kWh per year, more than the 4,600 kWh a heat pump uses to heat a typical 2,000 sq ft oil home.
Solar panels now carry 25-30 year performance warranties and 12-25 year product warranties. Modern microinverter systems (Enphase IQ8+) provide panel-level optimization and monitoring. A Massachusetts solar installation produces about 1,200 kWh per installed kW per year, with peak production from April through September.
Key consideration: the federal 25D residential solar tax credit expired December 31, 2025. However, the Massachusetts SMART program, net metering credits, state tax credit ($1,000), and property/sales tax exemptions still provide significant value. Solar-powered electrification remains strongly ROI-positive even without the ITC.
A whole-home cold-climate heat pump system for a typical Massachusetts home (2,000 sq ft, 3-ton capacity) costs approximately $16,000 before the Mass Save rebate. The whole-home rebate is $2,650 per ton, so $7,950 for 3 tons, which brings the net cost to roughly $8,100. Sizing varies from 2 tons (1,200 sq ft condo) to 5+ tons (3,500+ sq ft colonial).
Cold-climate models from Mitsubishi (Hyper-Heating), Fujitsu (XLTH), and Bosch (Climate 5000i) are rated to keep heating at outdoor temperatures down to roughly -13 to -22 degrees F, depending on model. At 17 degrees F (a standard HSPF2 rating point), modern units achieve COP 2.5-3.0, meaning they produce 2.5-3.0 units of heat per unit of electricity consumed.
Heat pumps also replace your air conditioning system, providing cooling at the same or better efficiency than most window or central AC units. The calculator counts heating savings only, so any cooling savings come on top.
A 13.5 kWh battery system (Tesla Powerwall 3 or equivalent) costs approximately $12,000-$15,400 installed. Battery storage serves three purposes in an electrification project: backup power during grid outages (critical for heat pump and medical equipment), ConnectedSolutions demand response revenue (about $1,114/year for 5 summers), and time-of-use optimization where applicable.
ConnectedSolutions pays $275 per kW of average battery output during 30 to 60 summer peak events of two to three hours, with the rate locked for 5 summers. A 13.5 kWh battery can sustain about 4.5 kW through a 3-hour event; at 90% performance that is about $1,114 a year, or about $5,600 over the rate lock, roughly half the battery's cost. Backup power, not program income, is the main reason to add one.
Modern lithium iron phosphate (LFP) batteries carry 10-year warranties guaranteeing 70-80% capacity retention. Real-world degradation is typically 1-2% per year, meaning your battery will still perform well after 15+ years.
A Level 2 (240V, 48A) EV charger costs $1,200-$1,800 installed, including the charging unit, wiring, and permitting. Smart chargers from ChargePoint, Emporia, or Wallbox integrate with solar systems to prioritize charging during peak solar production hours, making the most of your solar production.
Home charging is billed at your utility's all-in rate, and solar power used for charging is power you would otherwise credit against your bill, so charging is not free. Fuel savings versus gasoline depend on your vehicle, mileage, and gas prices; the calculator counts the charger's cost but not those savings.
Many Massachusetts homes, especially those built before 2000, have 100-amp or 150-amp electrical panels. A full electrification project (solar inverter, heat pump, battery, and EV charger) typically requires 200-amp service. The upgrade costs $2,500-$3,500 and includes a new panel, main breaker, and utility meter socket.
If you already have solar (and therefore likely already have a 200A panel), you may not need this upgrade. Your installer will assess panel capacity during the initial site survey. Some homeowners opt for a SPAN smart panel ($7,000-$9,000), which provides circuit-level monitoring, load management, and can defer the need for a heavier service upgrade.
Massachusetts lets homeowners stack several clean-energy incentives. Some reduce what the project costs you (the Mass Save rebate, and the state tax credit when you file); others pay out over time (SMART, ConnectedSolutions, and net metering credits). For the calculator's default oil-heated 2,000 sq ft home, the rebate and tax credit cut the solar-plus-heat-pump cost by about 20%, from $48,599 to $39,099.
$2,650 per ton, capped at $8,500, for 2026 installs. The heat pump must be your only heating source, and the old system must be removed or disconnected (it may stay only to heat domestic hot water). From January 1, 2027 the rebate drops to $2,350 per ton, capped at $7,500. Income-qualified households can get up to $16,000 for an air-source heat pump, or a no-cost turnkey installation.
$0.03/kWh for 20 years ($0.06 for qualifying low-income households). The Solar Massachusetts Renewable Target program pays you for every kWh your solar system produces, regardless of whether you consume it or send it to the grid. A 10 kW system producing about 12,000 kWh a year earns about $360 a year, or roughly $6,900 over the 20-year term. Systems up to 25 kW get the flat rate without competing for capacity blocks; the SMART storage adder applies only to larger systems.
Credits worth most of your per-kWh rate. Solar electricity you export earns net metering credits valued at your utility's basic service, distribution, transmission, and transition charges; they don't include the fixed customer charge or the efficiency and renewable-energy charges. Credits never expire and roll over month to month, but residential customers can't cash them out, so size the system to your yearly use. Credits banked in summer then offset winter bills, when a heat pump adds load.
$275 per kW of average output, summer events, locked for 5 summers. Battery owners enroll their system in the utility demand response program. During 30 to 60 peak events from June through September (two to three hours each), your battery discharges to support the grid. A standard 13.5 kWh battery earns about $1,114 a year. The program is available from Eversource, National Grid, and Cape Light Compact; Unitil customers can't enroll.
15% of cost, up to $1,000, state income tax credit (M.G.L. c.62 §6(d); 830 CMR 62.6.1) for residential solar, once per principal residence. Plus a property tax exemption for 20 years on the added value of solar, and a sales tax exemption on solar and heat pump equipment for your principal residence. These exemptions prevent your solar investment from increasing your property tax bill.
0% APR up to $25,000, terms of up to 7 years. The HEAT Loan covers remaining heat pump costs after rebates, and can also finance insulation, heat pump water heaters, and batteries enrolled in ConnectedSolutions. The term depends on household income, and $25,000 is a lifetime total per customer.
Home: 2,200 sq ft cape, built 1975, Eversource territory
Current: Oil boiler (20 years old), window AC units, 100A panel
Annual fuel cost: $3,500 oil + $800 electric = $4,300/year
Total: $64,700
Net cost: $55,200 | Payback: ~10.7 years
Home: 2,800 sq ft colonial, built 1998, National Grid territory
Current: Gas furnace (15 years old), central AC, 200A panel
Annual fuel cost: $2,400 gas + $1,200 electric = $3,600/year
Total: $74,700
Net cost: $65,200 | Payback: ~14.8 years
Both examples use the calculator's model: each home's utility rate and winter heat pump rate, solar savings capped at the home's electric bill after the heat pump, and no EV fuel savings.
A complete home electrification project in Massachusetts typically spans 8-16 weeks from initial assessment to final inspection. The timeline depends on permit processing times (varies by municipality), equipment availability, and whether you are working with a single contractor or coordinating multiple trades. Here is a realistic breakdown:
Free assessment by certified advisor. Identifies insulation needs, heating system efficiency, and upgrade priorities. Required for income-based Mass Save rebates and for a 0% HEAT Loan on a whole-home heat pump.
Mass Save covers 75-100% of insulation costs. Attic, basement rim joist, and wall insulation. Critical to complete before heat pump sizing for accurate load calculations.
Site survey, system design, structural review, building permit, and Eversource/National Grid interconnection application. Permit timelines vary from 1-4 weeks by municipality.
Indoor and outdoor unit installation, refrigerant lines, electrical connections, and commissioning. Can proceed in parallel with solar permitting. Typically 1-3 days of on-site work.
Roof mounting, panel installation, inverter, battery, and electrical connections. 1-2 days for solar, 1 day for battery. Followed by municipal inspection and utility interconnection.
Eversource/National Grid inspects and approves the interconnection. Permission to Operate (PTO) issued. System goes live. SMART enrollment confirmed. ConnectedSolutions enrollment processed.
Massachusetts building policy is moving toward electrification. As of June 2026, 302 of the state's 351 municipalities have adopted the stretch energy code, and 60 of them have adopted the Municipal Opt-in Specialized Code. For new homes, the Specialized Code allows all-electric or zero-energy construction, or mixed-fuel construction that adds at least 4 kW of on-site solar and electric pre-wiring; new homes over 4,000 sq ft must be all-electric or zero energy. Separately, ten communities (Acton, Aquinnah, Arlington, Brookline, Cambridge, Concord, Lexington, Lincoln, Newton, and Northampton) are in the state's Fossil Fuel-Free Building Demonstration Program, which lets them require fossil-fuel-free new construction and major renovations.
For existing homeowners, neither code requires you to change your heating unless you renovate or add on. The trajectory is still clear, and several factors make proactive electrification financially smart:
The bottom line: Massachusetts homeowners who electrify in 2026 are positioning themselves on the right side of energy economics and state policy, especially if they heat with oil, propane, or electric baseboard today.
Using this page's March 2026 installed-cost assumptions, solar plus a whole-home cold-climate heat pump for a 2,000 sq ft home costs about $48,600 before incentives; adding a 13.5 kWh battery, a Level 2 EV charger, and a 200A panel upgrade brings it to about $65,100. The Mass Save heat pump rebate (up to $8,500 for 2026 installs) and the $1,000 state tax credit lower those to about $39,100 and $55,600. SMART payments, solar bill savings, and ConnectedSolutions revenue then arrive over time. For an oil-heated home on Eversource, the solar-plus-heat-pump package pays back in about 7.3 years; a gas-heated home takes about 9 years, because a heat pump costs about as much as gas to run.
For heat pumps installed in 2026, Mass Save pays $2,650 per ton for whole-home systems, up to $8,500; installations from January 1, 2027 drop to $2,350 per ton, capped at $7,500. Whole-home means the heat pump is your only heating source and the old system is removed or disconnected (it may stay only to heat domestic hot water). Income-qualified households can get up to $16,000 for an air-source heat pump, or a no-cost installation through the turnkey path. Mass Save also offers $750 for a heat pump water heater, 75-100% off approved insulation and air sealing, and the 0% HEAT Loan up to $25,000. A free Home Energy Assessment is required for income-based rebates and for a HEAT Loan on a whole-home heat pump.
A complete home electrification project typically takes 8 to 16 weeks from start to finish. The timeline breaks down as: Mass Save energy assessment (1-2 weeks to schedule), insulation work (1-2 weeks), heat pump installation (1-2 weeks), solar permitting and installation (4-8 weeks), and battery/EV charger installation (1-2 weeks, often concurrent with solar). Working with a single installer for all components can streamline the timeline.
Not automatically. At current prices a heat pump costs about as much as natural gas to run: National Grid R-3B, winter 2025–26 delivery + supply came to about $2.56 per therm, and on Eversource's winter heat pump rate a heat pump delivers the same heat for about $2.70 per therm of gas it replaces (seasonal COP 2.61, measured in Massachusetts and Connecticut homes). DOER's own winter heating report cautions that households should not assume switching fuels will automatically save money. For a gas-heated home the savings come mostly from solar: in this calculator's default 2,000 sq ft home on Eversource, the heat pump adds about $66 a year to heating costs, while solar and SMART add about $4,500 a year. A heat pump also replaces air conditioning.
SMART 3.0 pays $0.03 per kWh ($0.06 for qualifying low-income households) for every kWh a residential system up to 25 kW produces, fixed for 20 years from when the system qualifies. It is available to Eversource, National Grid, and Unitil customers; Cape Light Compact customers enroll through Eversource. A 10 kW system producing about 12,000 kWh a year earns about $360 a year, or roughly $6,900 over 20 years with normal panel degradation. SMART is paid in addition to net metering credits, which are valued at your utility's basic service, distribution, transmission, and transition charges.
ConnectedSolutions is a summer demand-response program from Eversource, National Grid, and Cape Light Compact (Unitil customers can't enroll). From June through September your battery discharges during 30 to 60 peak events of two to three hours, and you earn $275 per kW of average contribution, with that rate locked for 5 summers. A 13.5 kWh battery can sustain about 4.5 kW through a 3-hour event; at 90% performance that is about $1,114 a year, or about $5,600 over 5 summers. Payments are for summer events only.
Many Massachusetts homes built before 2000 have 100-amp or 150-amp electrical panels, which are insufficient for solar + heat pump + battery + EV charger. A 200-amp panel upgrade costs $2,500-$3,500 installed. If you already have solar and are adding a heat pump only, you may not need an upgrade. An electrician will assess your panel capacity during the site survey. SPAN smart panels ($7,000-$9,000) are an alternative that provide panel-level monitoring and load management.
All-in residential rates now run from $0.36 to $0.48 per kWh depending on your utility (Eversource Eastern MA $0.38, National Grid $0.42, Unitil $0.48, Cape Light Compact $0.38). With solar, much of your electricity comes from your own panels, so each rate increase makes every kWh you produce or bank as a net metering credit more valuable. Heat pump owners also pay a lower winter rate from November through April, and a battery enrolled in ConnectedSolutions adds summer income. This calculator holds rates flat; rising rates would raise the value of your solar output but also the cost of running the heat pump, so the net effect depends on how much of your use solar covers.
Yes. Many homeowners electrify in phases: solar plus a heat pump first (the largest savings and rebates), a battery when backup power or ConnectedSolutions income justifies it, and an EV charger when they buy an EV. Size the solar for future loads from the start: a 10 kW system produces about 12,000 kWh a year, while a heat pump heating a 2,000 sq ft oil home uses about 4,600 kWh, so plan more capacity if an EV is coming. Timing matters too: Mass Save's 2026 rebate levels apply to heat pumps installed by December 31, 2026, and SMART locks the rate in effect when your system qualifies.
As of June 2026, 302 of Massachusetts's 351 municipalities have adopted the stretch energy code, and 60 of them the Municipal Opt-in Specialized Code. For new homes, the Specialized Code allows all-electric or zero-energy construction, or mixed-fuel construction that adds at least 4 kW of on-site solar and electric pre-wiring; new homes over 4,000 sq ft must be all-electric or zero energy. Neither code requires existing homes to change their heating unless you renovate or add on. The policy direction still matters for current gas customers: in its 2023 Future of Gas order (D.P.U. 20-80-B), the Department of Public Utilities acknowledged that customers who stay on gas could face higher rates as others leave the system.
Get a free, personalized electrification plan with exact costs, incentives, financing, and timeline for your home. NuWatt handles solar, heat pumps, batteries, and EV chargers — one contractor, one project, maximum savings.
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