How Much Do Solar Panels Cost in Massachusetts in 2026?
Figures checked November 10, 2026. Prices and incentives change; we confirm the current numbers for your address before you sign anything.
Short answer: most Massachusetts homeowners pay about $2.60 to $3.50 per watt for an installed rooftop solar system in 2026, with marketplace averages near $2.90 per watt. A typical system of about 11 kW comes to roughly $32,000 before incentives. What you actually pay depends on your roof, your electricity use and which incentives apply to you.
Average solar panel cost in Massachusetts (2026)
EnergySage’s marketplace data (updated October 30, 2026) puts the Massachusetts average at $2.90 per watt installed, and a typical 11.05 kW system at about $32,067 before incentives. Other 2026 guides land in the same range: SolarReviews reports about $3.13 per watt and ConsumerAffairs about $2.91 per watt.
| System size | At $2.60/W | At $2.90/W (average) | At $3.40/W |
|---|---|---|---|
| 6 kW | $15,600 | $17,400 | $20,400 |
| 8 kW | $20,800 | $23,200 | $27,200 |
| 10 kW | $26,000 | $29,000 | $34,000 |
| 12 kW | $31,200 | $34,800 | $40,800 |
Smaller systems usually cost more per watt, because permitting, design and labor are partly fixed costs.
Is the 30% federal solar tax credit still available?
Not for homeowners who buy their system in 2026. The federal Residential Clean Energy Credit (Section 25D) ended for homeowner-owned systems after December 31, 2025, under the law signed in July 2025. If your system was finished in 2025, you can still claim it on your 2025 return, and unused credit from earlier years can still carry forward.
Leased systems and power purchase agreements (PPAs) are different: the company that owns the system may still claim a business credit through 2027 and pass some of that value to you in the price. Ask your tax professional how your situation applies.
Massachusetts incentives that still lower your cost
- SMART 3.0: in 2026, home systems of 25 kW or less earn a flat $0.03 per kWh they produce ($0.06 for low-income qualified customers), locked in for 20 years, according to MassCEC. Rates can change for later program years.
- Net metering: extra power your panels send to the grid earns bill credits from your utility.
- State income tax credit: 15% of the system cost, up to $1,000.
- Sales tax exemption: residential solar equipment is exempt from the 6.25% state sales tax. Your quote should not include it.
- Property tax exemption: the value solar adds to your home is exempt from local property tax for 20 years.
See every program and how they stack on our Massachusetts solar incentives page.
Example: an 8 kW system
- Installed price at the $2.90/W average: $23,200
- Minus the state tax credit: -$1,000, for a net of about $22,200
- SMART payments: if the system produces about 9,000 kWh a year, SMART pays about $270 a year for 20 years, on top of your net-metering bill savings.
This is an illustration, not a quote. Production depends on your roof direction, pitch and shade, which is why we model your actual roof before pricing.
What makes a solar quote higher or lower
- System size: sized to your last 12 months of electricity use, and to any heat pump or EV you plan to add.
- Roof condition: if your roof needs replacing within a few years, it is usually cheaper to do it first. See solar-ready roofing.
- Electrical panel: older 100-amp panels sometimes need an upgrade. See panel upgrades.
- Equipment: panel brand, microinverters or optimizers, and monitoring.
- Battery: adding storage raises the price, and can earn utility battery program payments. See home battery storage.
Paying for it
Many homeowners finance solar so the monthly payment is close to, or below, the electric bill it replaces. Compare financing options, or estimate your own numbers with our solar savings calculator.
Get an exact price for your home
Nexis Power designs, permits and installs solar panels for Massachusetts homes and files the SMART and interconnection paperwork for you. Book a free assessment and we will model your roof, your bill and your incentives before you decide.
Sources
- EnergySage, Massachusetts solar panel cost (updated October 30, 2026): energysage.com/local-data/solar-panel-cost/ma/
- SolarReviews, Massachusetts solar panel costs 2026: solarreviews.com/solar-panel-cost/massachusetts
- MassCEC, Guide to the SMART 3.0 program (June 10, 2026): masscec.com
- EnergySage News, bill ending the residential solar tax credit: energysage.com/news