Solar payback in Massachusetts
A 7.7 kW home solar system in Massachusetts pays for itself in about 9.1 years at 2026 prices, with no federal tax credit. That ranks #3 of 51 states, where 1 is the fastest.
- Installed price
- $3.40/W
- Massachusetts median, 2025
- Solar output
- 1,302 kWh
- per kW a year, Boston weather
- Electricity rate
- 30.49¢/kWh
- average home rate, EIA
- Value of a solar kWh
- 28.7¢
- reduced credit for exports
Pays back in year 10
- Cost up front
- $26,180
- Saved per year
- $2,873
- Ahead after 25 years
- $45,653
Payback by quoted price and roof direction
Find your installer's price per watt (total price divided by system watts) to read your payback in Massachusetts. Nationally, cash buyers paid a median of $3.00 per watt in 2025 and loan buyers $4.50, because loan fees are often built into the price. East and west roofs make 16% and 16% less power than south here.
| Price per watt | 7.7 kW costs | South roof | East roof | West roof |
|---|---|---|---|---|
| $2.50 | $19,250 | 6.7 years | 7.9 years | 8.0 years |
| $3.00 | $23,100 | 8.0 years | 9.5 years | 9.6 years |
| $3.40 (Massachusetts median) | $26,180 | 9.1 years | 10.8 years | 10.9 years |
| $4.00 | $30,800 | 10.7 years | 12.7 years | 12.8 years |
| $4.50 | $34,650 | 12.1 years | 14.3 years | 14.4 years |
System size barely changes payback here: a bigger system costs more and saves more in about the same proportion.
Questions about solar in Massachusetts
How does Massachusetts pay for solar power I send to the grid?
Massachusetts still has net metering for home systems up to 25 kW. The credit covers most of the per-kWh rate but not every charge: the state's example is about 27 cents per kWh for an Eversource East home customer in August 2024, close to 90% of the retail rate. We assume you use 40% of your solar power at home, which makes the average solar kWh worth 28.7¢. Source.
How much did the end of the federal tax credit change payback in Massachusetts?
With the 30% credit that ended in 2025, the same system would have paid back in about 6.4 years instead of 9.1. The credit ended for systems installed after December 31, 2025. Leased systems and power purchase agreements can still pass on a business credit, but then you do not own the panels.
Is 1,302 kWh per kW a lot?
The range across states runs from about 922 kWh in Alaska to about 1,779 in the Southwest. Sunshine matters less than people expect: the electricity rate and how your utility credits exports move payback more.
States near Massachusetts in the ranking
- Hawaii 8.1 years
- Maine 8.4 years
- Rhode Island 9.6 years
- Connecticut 10.2 years
- District of Columbia 10.5 years