Solar panels in Maine
What a residential solar system actually costs in Maine in 2026 — plus incentives, payback, and how to pick a vetted installer.
The real cost of solar in Maine
A typical 8.5 kW rooftop system in Maine runs about $26,775 installed. The federal Residential Clean Energy Credit knocks 30% off — around $8,033 — bringing the net price to roughly $18,742.
Maine also exempts the added home value from property tax.
What you'll produce — and save
- ~10,424 kWh/year from a 8.5 kW system at 4.2 peak sun hours.
- At 24.8¢/kWh that's $2,585/yr off your electric bill in year one.
- Estimated payback: 7.3 years.
- 25-year net savings (2.5% annual rate escalation): $69,556.
Estimates only. Actual production depends on roof orientation, shade, equipment and your utility's specific tariff.
Net metering in Maine
Maine operates under a net billing policy for residential solar exports. Exports are credited at a wholesale/avoided-cost rate rather than the retail rate. Batteries usually improve payback under this policy.
Top Maine metros we cover
FAQ
How much do solar panels cost in Maine?
A typical 8.5 kW residential system in Maine costs about $26,775 before incentives, or roughly $3.15 per watt installed. After the 30% federal tax credit that drops to about $18,742.
Is solar worth it in Maine?
With an average residential electricity rate of 24.8¢/kWh and 4.2 peak sun hours per day, a properly sized system typically pays for itself in about 7.3 years and saves roughly $69,556 over 25 years.
Does Maine have net metering?
Maine operates under a net billing policy for residential solar exports. Exact credit values vary by utility — always confirm with the specific utility serving your address.
What state incentives are available in Maine?
Maine does not currently offer a dedicated state solar tax credit. Property tax exemption: Yes. Sales tax exemption: No. The 30% federal Residential Clean Energy Credit also applies.
Get vetted Maine installer quotes.
SolarPros only lists installers who pass our licensing, insurance and reputation checks. Free to request — no pressure.
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Sources: EIA average residential electricity rates, NREL PVWatts sun hour data, DSIRE state incentive database, LBNL "Tracking the Sun" installed-cost benchmarks. Figures are estimates for guidance only, not a binding quote.