ME incentive guide
Maine solar incentives in 2026
Last updated · every ME program below is verifiable against the sources at the foot of this page.
The most valuable solar incentive in Maine right now is Net energy billing (near-retail export credit). Overall, the state's incentive stack rates as limited compared with the rest of the country.
The federal credit is gone — start here
The 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025. If you are buying a system in Maine this year, there is no federal credit. That is a roughly $8,640 swing on an $28,800 system compared with 2025 pricing, and it is why state programs matter more now than they did a year ago.
What Maine offers at a glance
| Incentive | Available? | Details |
|---|---|---|
| State income tax credit | No | — |
| Rebate or performance payment | No | — |
| SREC market | No | — |
| Sales tax exemption | No | — |
| Property tax exemption | No | — |
| Federal tax credit | No | Section 25D ended for systems installed after December 31, 2025. |
Reviewed September 2026. Incentive programs change frequently and several are funding-capped — verify current status with the administering agency or DSIRE before relying on any figure.
Maine solar tax credit
There is no Maine solar tax credit in 2026, and no federal one either — Section 25D ended for systems installed after December 31, 2025. That makes your electricity rate and your utility's export credit the whole of the economics here.
Maine solar rebates and grants
Maine runs no statewide solar rebate or grant program in 2026. Individual utilities and municipalities sometimes do, and those are rarely advertised well — ask your utility directly what they pay toward a residential install.
Maine relies mainly on net energy billing rather than rebates; Efficiency Maine periodically offers related programs (notably for heat pumps and storage).
Net metering and export rates in Maine
Maine’s net energy billing credits exports at close to retail value with 12-month rollover, one of the stronger policies in New England. Program details have been debated legislatively — confirm current terms.
Compare this with net metering in every other state.
Export rules deserve to be read as an incentive. In a retail net metering state, every exported kilowatt-hour is worth the full retail rate; under net billing or avoided-cost compensation, the same kilowatt-hour can be worth a third of that. For a Maine home at an assumed $0.27/kWh, that difference compounds across a 25-year system life.
What this means for your numbers
A typical 8 kW system in Maine costs roughly $22,400–$28,800 installed before incentives, producing about 9,520 kWh a year and saving around $2,118 in year one — a simple payback near 11–14 years with no incentives applied. Anything in the table above shortens that.
Frequently asked questions
What are Maine solar tax credits worth in 2026?
Maine offers no residential solar income tax credit in 2026, and the 30% federal credit ended for systems installed after December 31, 2025. There is no state tax benefit to claim at all, so the economics rest on your electricity rate and export credit.
Does Maine have solar rebates?
No. Maine has no statewide solar rebate or upfront grant program in 2026. Individual utilities and municipalities occasionally run their own, so it is worth asking your utility directly.
Is there a Maine solar property tax exemption?
No. Maine does not exempt residential solar from property tax assessment, so a system that increases assessed value can increase your property tax. Assessment practice varies by county — ask your local assessor how they treat rooftop solar.
What solar incentives are available in Maine in 2026?
Maine relies mainly on net energy billing rather than rebates; Efficiency Maine periodically offers related programs (notably for heat pumps and storage). Because the federal Section 25D credit ended for systems installed after December 31, 2025, these state, local and utility programs are now the entire incentive picture for a purchased system.
Is there still a 30% federal solar tax credit in Maine?
No. The 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025 under the One Big Beautiful Bill Act. Any quote or website still applying 30% to a 2026 purchased installation is out of date. Leased and PPA systems can still benefit indirectly, because the third party that owns the system may claim the commercial 48E credit through 2027 and pass some of the value through in pricing.
Does Maine have net metering?
Maine’s net energy billing credits exports at close to retail value with 12-month rollover, one of the stronger policies in New England. Program details have been debated legislatively — confirm current terms. Export rules are effectively an incentive — often the largest one — because they set what every kilowatt-hour you do not use on site is worth.
How much do incentives change the cost of solar in Maine?
Before incentives, a typical 8 kW system in Maine runs roughly $22,400–$28,800. With no state credit or rebate available, that figure is close to what you would actually pay. See our full Maine cost breakdown for payback math.
Verify before you rely on any of this
Incentive programs open, close, deplete their funding and change their caps — often mid-year. This page is a starting point reviewed September 2026, not tax advice. Confirm with: