Solar panels in Massachusetts
Roofs across Massachusetts get about 1,443 hours of usable sunlight a year, and electricity costs 30.1¢/kWh. That combination puts a typical system's payback at 5.6 years. Here's the detail, from real rooftop data across 4 Massachusetts cities.
Check your own roof in Massachusetts → These are regional figures; your roof's size, pitch and shading move them a lot.
How Massachusetts compares
Massachusetts gets more sunlight than 32% of the cities we measure, and its electricity costs more than 95% of states and provinces. Both matter, but not equally: the electricity rate usually matters more, because solar saves money by replacing power you would otherwise buy. A sunny state with cheap power often pays back slower than a cloudy state with expensive power. Why that happens →
Solar by city in Massachusetts
| City | Sun hrs/yr | Panels | Net cost | Payback |
|---|---|---|---|---|
| Boston | 1,446 | 22 | $17,556 | 5.4 yrs |
| Worcester | 1,443 | 23 | $18,354 | 5.6 yrs |
| Cambridge | 1,404 | 23 | $18,354 | 5.6 yrs |
| Springfield | 1,310 | 25 | $19,950 | 6.1 yrs |
What a system costs in Massachusetts
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 3,925 | $6,384 | $1,181 | 5.4 yrs |
| 12 panels | 4.8 kW | 5,887 | $9,576 | $1,772 | 5.4 yrs |
| 16 panels | 6.4 kW | 7,850 | $12,768 | $2,363 | 5.4 yrs |
| 20 panels | 8 kW | 9,812 | $15,960 | $2,954 | 5.4 yrs |
| 26 panels | 10.4 kW | 12,756 | $20,748 | $3,398 | 6.1 yrs |
Payback stops improving as systems grow, then gets worse. You can only save on electricity you were going to buy, so once a system covers your usage the extra panels mostly export at a lower rate.
Massachusetts solar incentives
Every US household can claim the 30% federal residential clean energy credit, which is what the "after credit" figures above assume. On a $26,220 system that is $7,866 back. How the credit works →
State, utility and municipal incentives stack on top and change often — Massachusetts may offer rebates, property or sales tax exemptions, or performance payments. We deliberately don't list specific state programmes here because they change several times a year and stale numbers are worse than none. The DSIRE database is the standard reference and is kept current.
Massachusetts solar questions
Is solar worth it in Massachusetts?
At 30.1¢/kWh and 1,443 usable sun hours, a typical system pays back in about 5.6 years and returns roughly $63,827 over 25 years. That is a solid return.
How many solar panels do I need in Massachusetts?
About 23 panels for a home using 10,800 kWh a year. Each 400W panel produces roughly 491 kWh annually at Massachusetts sunlight levels.
How much do solar panels cost in Massachusetts?
A 9.2 kW system runs about $26,220 before incentives and $18,354 after the 30% federal credit. Quotes vary widely by installer and roof complexity — get three.
Worth reading before you buy
Regional estimates generated 2026-08-22 from Google Solar API rooftop samples across 4 Massachusetts cities, and average Massachusetts electricity rates. Not a quote and not financial or tax advice.