Solar savings & payback in Maine
Maine runs about 28¢/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
- 28¢/kWh
- Solar generation
- ~3.8 kWh/kW/day
- Net metering
- Full retail net metering (1:1)
- Export credit
- Full retail (1:1)
State incentive: High rates and 1:1 netting make solar attractive despite the northern latitude.
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 Maine compares to the US average
Three numbers decide most of your payback. Here's where Maine sits against the national picture.
Electricity rate
28¢/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
7.2 years
US average: 10.6 years
Faster than the US average on a $150 bill
Solar cost & savings by system size in Maine
Computed with Maine's rate (28¢/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 | ~$1,532 | ~7.2 yrs |
| 6kW | ~$16,500 | ~684 kWh | ~$2,298 | ~7.2 yrs |
| 8kW | ~$22,000 | ~912 kWh | ~$3,064 | ~7.2 yrs |
| 10kW | ~$27,500 | ~1,140 kWh | ~$3,830 | ~7.2 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 Maine
Full kWh-for-kWh net energy billing.
Policies change often, always confirm current rules with your utility or at DSIREbefore deciding.
Maine solar FAQs
Is solar worth it in Maine in 2026?
For a typical $150/month bill, we estimate a Maine system pays for itself in about 7.2 years, with no federal tax credit assumed (the residential credit expired at the end of 2025). At 28¢/kWh with full retail net metering (1:1), the economics are solid for most suitable roofs.
How much does a solar system cost in Maine?
At 2026 benchmark prices (~$2.75/W), a 6kW system runs about $16,500 installed, generating roughly 684 kWh a month in Maine's sun. Local quotes vary 20-40% between installers, so always collect several.
What is the net metering policy in Maine?
Full kWh-for-kWh net energy billing.
Does Maine have a state solar incentive?
High rates and 1:1 netting make solar attractive despite the northern latitude. 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 Maine?
A 4.5 kW system suits a typical $150/month bill in Maine, 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.