Solar Panel Cost in Boston, MA (2026)
Real installed prices, Eversource credit rules, local rebates and how long a system takes to pay for itself in Boston.
Estimate your Boston system
Assumes a local rate of 28¢/kWh, 1500 kWh generated per installed kW per year, $3.2/W installed, the 30% federal credit and local rebates. Estimates only.
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Solar prices in Boston by system size
| System | Gross cost | After 30% credit | After local rebates | Yearly output | Yearly savings | Payback |
|---|---|---|---|---|---|---|
| 5 kW | $16,000 | $11,200 | $11,200 | 7,500 kWh | $2,100 | 5.3 yrs |
| 7 kW | $22,400 | $15,680 | $15,680 | 10,500 kWh | $2,940 | 5.3 yrs |
| 10 kW | $32,000 | $22,400 | $22,400 | 15,000 kWh | $4,200 | 5.3 yrs |
| 12 kW | $38,400 | $26,880 | $26,880 | 18,000 kWh | $5,040 | 5.3 yrs |
Payback assumes exported power is credited near the retail rate. Confirm your utility's current policy — several states are mid-transition.
What makes Boston different
1. Eversource sets the interconnection rules
Boston sits in Eversource territory. Interconnection, the export credit rate and any capacity caps all come from that utility and are subject to change — confirm the current rules before signing a contract.
2. Export credit treatment matters more than panel brand
How exported power is credited has a bigger effect on payback than which panels you buy. Size to your own annual usage first, then pick equipment.
3. Net metering, but mid-transition
Exports are still credited close to retail in Boston, but the policy is being phased down in many markets. Grandfathering rules and application dates matter — check the current schedule before signing.
4. Winter output, not summer, sets your annual number
Shorter winter days and snow cover pull Boston's annual production down to about 1500 kWh per installed kW. Summer months over-produce; December and January under-produce. Size on the annual figure, never on a sunny week.
5. High local rates shorten payback
At about 28¢/kWh, Boston has rates well above the national average. High rates are the single biggest reason payback is faster here than in most of the country — and the reason self-consumption, not export, drives the return.
What affects your price in Boston
- System size — the single biggest driver.
- Roof pitch and height — steep or two-storey roofs add labour.
- Roof age — replace worn shingles first; re-roofing around panels costs more later.
- Panel and inverter tier — premium modules and microinverters add 15–25%.
- Main panel upgrade — older homes may need a 200A service upgrade, $1,500–$3,000.
- Battery — optional, roughly $10,000–$15,000 installed.
- Season — late autumn and winter installs are often cheaper.
Solar cost in nearby cities
| City | Utility | Export credit |
|---|---|---|
| New York, NY | Con Edison | net metering |
| Buffalo, NY | National Grid | net metering |
| Newark, NJ | PSE&G | net metering |
| Philadelphia, PA | PECO | net metering |
Boston solar FAQ
How much do solar panels cost in Boston?
A 7 kW system — the most common size locally — costs about $22,400 installed before incentives, or $15,680 after the 30% federal tax credit and local rebates.
How long is the payback period in Boston?
Roughly 5.3 years for a properly sized system, based on local rates, 1500 kWh of production per installed kW, and current incentives.
Does Eversource offer a rebate?
Programs and funding change. Confirm the current Eversource incentive directly with the utility, and never accept an installer's rebate promise that isn't in writing.
Do I need a permit to install solar in Boston?
Yes. Boston requires an electrical and structural permit plus an inspection, and Eversource handles interconnection separately. A reputable installer files all of it — ask to see the permit number.
How much roof space does a system need?
A 7 kW array needs roughly 455–595 square feet of unshaded roof, depending on panel wattage and layout.
Is Boston a good place for solar?
The sun resource is strong at about 1500 kWh per installed kW per year, and local rates run near 28¢/kWh. The real variables are roof condition, shading and Eversource's export credit rules.
Ready for exact numbers?
Get three quotes from vetted Boston installers. Form-only — they call you.
Sources & method
Production modelled with NREL PVWatts. Utility rate from EIA retail-sales data. Incentive data from DSIRE and IRS guidance. Installed cost benchmarked to local market pricing. Last updated October 2026. Estimates only — not a quote.