Solar savings & payback in Massachusetts
Massachusetts runs about 30¢/kWh with full retail net metering (1:1). Enter your bill for a payback estimate tuned to local rates and sun, no federal tax credit assumed (it expired at the end of 2025).
- Avg electricity rate
- 30¢/kWh
- Solar generation
- ~3.8 kWh/kW/day
- Net metering
- Full retail net metering (1:1)
- Export credit
- Full retail (1:1)
State incentive: SMART program production incentive plus a state income-tax credit; very high rates.
Where your money goes
Your 25-year money curve
What the planet gets
Net metering credits exported power against what you draw from the grid. Rates vary by state, California's NEM 3.0 pays much less for exports than 1:1 states.
Enter a valid monthly bill and tariff greater than zero to see your results.
How Massachusetts compares to the US average
Three numbers decide most of your payback. Here's where Massachusetts sits against the national picture.
Electricity rate
30¢/kWh
US average: 17¢/kWh
Higher rates make every solar kWh worth more
Solar generation
~3.8 kWh/kW/day
US average: ~4.5 kWh/kW/day
Less sun per panel than the US average
Typical payback
6.9 years
US average: 10.6 years
Faster than the US average on a $150 bill
Solar cost & savings by system size in Massachusetts
Computed with Massachusetts's rate (30¢/kWh), sun (~3.8 kWh/kW/day), and full 1:1 net metering, at the 2026 national benchmark of ~$2.75/W with no federal credit.
| System size | Installed cost | Generation/mo | Annual savings | Payback |
|---|---|---|---|---|
| 4kW | ~$11,000 | ~456 kWh | ~$1,642 | ~6.7 yrs |
| 6kW | ~$16,500 | ~684 kWh | ~$2,462 | ~6.7 yrs |
| 8kW | ~$22,000 | ~912 kWh | ~$3,283 | ~6.7 yrs |
| 10kW | ~$27,500 | ~1,140 kWh | ~$4,104 | ~6.7 yrs |
Savings assume a home large enough to use this output. Figures last reviewed July 2026,size a system from your actual bill instead.
How exports are paid in Massachusetts
Full retail net metering (for most utilities and system sizes).
Policies change often, always confirm current rules with your utility or at DSIREbefore deciding.
City-level calculators in Massachusetts
Sun varies within the state, these pages tune the generation estimate to each metro's solar resource.
Massachusetts solar FAQs
Is solar worth it in Massachusetts in 2026?
For a typical $150/month bill, we estimate a Massachusetts system pays for itself in about 6.9 years, with no federal tax credit assumed (the residential credit expired at the end of 2025). At 30¢/kWh with full retail net metering (1:1), the economics are solid for most suitable roofs.
How much does a solar system cost in Massachusetts?
At 2026 benchmark prices (~$2.75/W), a 6kW system runs about $16,500 installed, generating roughly 684 kWh a month in Massachusetts's sun. Local quotes vary 20-40% between installers, so always collect several.
What is the net metering policy in Massachusetts?
Full retail net metering (for most utilities and system sizes).
Does Massachusetts have a state solar incentive?
SMART program production incentive plus a state income-tax credit; very high rates. Since the federal residential credit ended in 2025, state and utility incentives are the main upfront help available.
How many solar panels do I need in Massachusetts?
A 4.5 kW system suits a typical $150/month bill in Massachusetts, that's roughly 11 modern 425W panels needing about 293 sq ft of unshaded roof. Enter your own bill in the calculator above for a precise size.