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Net Energy Billing (NEB) kWh Credit Program

  • Residential customers can use the NEB kWh Credit Program with their own project, such as rooftop solar, or join a shared ("community") project. Projects must be renewable generators under 5 MW. Source: Maine PUC, https://www.maine.gov/mpuc/regulated-utilities/electricity/neb (accessed 2026-10-20)
  • Unused credits expire after 12 months. Source: same (accessed 2026-10-20)
  • Anyone marketing projects to residential customers must be registered with the PUC and give customers an NEB disclosure form. Source: same (accessed 2026-10-20)

Little else at the state level

We didn't find a statewide incentive as of October 2026.

A note on the federal tax credit

The federal residential clean energy credit (25D) doesn't apply to expenditures made after December 31, 2025. The IRS treats an expenditure as made when installation is completed. Source: https://www.irs.gov/newsroom/faqs-for-modification-of-sections-25c-25d-25e-30c-30d-45l-45w-and-179d-under-public-law-119-21-139-stat-72-july-4-2025-commonly-known-as-the-one-big-beautiful-bill-obbb (accessed 2026-10-20). This page isn't tax advice.

Is solar worth it in Maine?

It depends on your bill, roof and utility rules. Here is an estimate for a home with a $150 monthly electric bill and a south-facing, unshaded roof, before any incentives:

  • Residential electricity averaged an estimated 29.99¢/kWh in Maine (January–July 2026), above the U.S. average of 18.19¢ (4 of 51, highest first). Source: EIA Electric Power Monthly, Table 5.6.B (accessed 2026-10-20)
  • Small rooftop systems in Maine produced an estimated 1,469 kWh per kW of panels in 2024 (2024 small-scale solar generation divided by average 2023–2024 small-scale capacity). Source: EIA Electric Power Annual 2024, Tables 3.21 and 4.7.B (accessed 2026-10-20)
  • Estimated system size: 3–4 kW, producing about 5,142 kWh a year (estimated).
  • Estimated installed cost: $10,500–$18,200 before incentives, using $3.00–$5.20 per watt. Source: Lawrence Berkeley National Laboratory (2024 installed prices, 20th–80th percentile; accessed 2026-10-20)
  • Estimated simple payback: 6–14 years. Savings depend on how your utility credits exported energy (see above).

Estimates only, based on public data and simple assumptions. Actual production, cost, and savings vary by home, utility, rate plan, and installer. Not a quote, and not a guarantee of savings. Ask your installer about any state, local, or utility incentives that apply. State and local programs: DSIRE.

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