Maine Energy Guide 2026: Solar, Batteries, Backup Power, EV

In short: Maine customers lost about 1,749 minutes of power in 2024, roughly 29 hours, the second-highest total in the country, and paid 32.41¢ per kWh in July 2026, the third-highest price (EIA). High prices plus long storm outages make Maine one of the strongest cases anywhere for solar paired with backup.

Maine also has three things many states don’t: one-for-one kWh net energy billing for home solar, a plug-in solar law, and Efficiency Maine incentives for EV chargers and batteries. Its weak spot is sun: less than in most states. Here’s how it all adds up.

Maine at a glance

• Home electricity price: 32.41¢/kWh in July 2026, up from 27.98¢ in July 2025; 29.99¢ average for January to July 2026. U.S. average 18.31¢ (EIA, preliminary).
• Outages (2024): about 1,749 minutes per customer with major events, 274 without; about 3.6 interruptions a year, 2.1 without major events (EIA-861).
• Sun: about 3.76 kWh/m² per day in Portland (NASA POWER, 2001–2020); rough estimate about 1,100 kWh per kW of panels per year.
• Net metering: Net Energy Billing with a one-for-one residential kWh credit on Central Maine Power and Versant. A 2025 law (LD 1777) tightened rules mainly for community and larger projects; the new kWh-program charge from 2026 is zero for systems under 1 MW.
• Plug-in solar law: yes. LD 1730 (Public Law Chapter 644, signed April 6, 2026): up to 420 W you can install yourself; 420 to 1,200 W needs a licensed electrician, a dedicated circuit and notice to the utility within 30 days; no net energy billing.
• EVs and charging: 11,900 battery-electric and 10,300 plug-in hybrids registered through 2025; 1,621 public ports at 651 locations, 435 of them DC fast (AFDC, October 2026).
• Main utilities: Central Maine Power (about 657,000 customers, 78% of the state) and Versant Power (about 166,000), plus Eastern Maine Electric Cooperative and Houlton Water Company (EIA-861, 2024).
• Weather risk (FEMA National Risk Index, Dec 2025): winter weather and ice storm relatively high; cold wave relatively moderate; hurricane, heat wave, tornado and strong wind relatively low; wildfire very low.
• Public Safety Power Shutoffs: no program found at Central Maine Power or Versant Power.

Backup power in Maine

Maine’s outage numbers are startling. On normal days a customer lost 274 minutes in 2024, already the third-highest in the country. Major storms added almost 1,500 more. That means about 84% of lost time came from big events, the wind and ice storms that bring down trees across the lines of a heavily wooded state. The average interruption, storms included, lasted about eight hours.

Interestingly, FEMA rates Maine’s overall expected annual loss from natural hazards as very low; the high ratings are specifically winter weather and ice storms. Those are exactly the events that cut power, often in the cold. Planning for a Maine outage means planning for heat, water and days, not hours:

• Heat: oil and propane boilers and furnaces, pellet stoves and heat pumps all need electricity. A generator through a transfer switch keeps them running; size it with the generator sizing tool.
• Water: many rural homes have a well pump, usually 240 V and hard-wired, which needs a transfer switch or backup panel installed by a licensed electrician.
• Quiet and automatic: a home battery with solar can carry essentials, though winter sun is short and snow covers panels. Check how long yours would last with the battery backup calculator.
• The basics kit: a portable power station for phones, lights, internet and a CPAP, indoors and fume-free.

CPSC warns about generator carbon monoxide in winter storms as well as hurricanes. Its rules: outdoors only, at least 20 feet from the house, exhaust away from doors and windows, never in a garage, shed or breezeway even with doors open, keep vents clear of snow, and put battery-backed CO alarms on every level.

Solar in Maine

Maine’s sun is modest, about 1,100 kWh per kW of panels a year by our rough estimate for Portland. But at 30 to 32¢ per kWh and with one-for-one kWh credits under Net Energy Billing, each kW of panels could offset on the order of $330 to $355 a year at 2026 prices. That’s an estimate, not a promise; shade from trees, roof direction and snow all matter, and prices can fall as well as rise. Federal solar credits ended for systems completed after December 31, 2025, and we didn’t confirm a current state solar rebate.

The 2025 changes under LD 1777 were aimed mainly at community solar and larger projects; for a home system the new kWh-program charge from 2026 is zero for systems under 1 MW. Ask CMP or Versant to confirm your terms before you sign.

Plug-in solar is legal in Maine. Under LD 1730, signed April 6, 2026, you can install plug-in solar or plug-in battery systems of up to 420 W yourself. From 420 to 1,200 W per service address, a Maine-licensed electrician must install each system on a dedicated circuit, and you notify the utility within 30 days. Plug-in systems don’t get net energy billing, so size a kit to what your home uses during the day; by our rough estimate a 420 W kit could make several hundred kWh a year in Maine sun. Read our full guide on where balcony solar is legal, plus our solar guide, solar costs, net metering explained and the solar potential calculator.

Home batteries in Maine

Maine is a natural battery state, yet only 55 of 14,867 net-metered home solar systems had one in EIA’s 2024 count. With kWh net billing, a battery adds little to solar savings; its value is riding through those long outages.

Efficiency Maine’s Battery Sharing Payments can help: Efficiency Maine pays participating battery manufacturers each year for power their batteries share at peak times, and the manufacturers pass payments to homeowners. Efficiency Maine’s own example is about $5,000 over 10 years for a 15 kWh battery. Check which batteries take part and how much capacity stays reserved for your own backup on the Efficiency Maine battery page; terms change. See also home batteries and battery costs.

EV charging in Maine

Maine has more public charging per EV than almost any state: 1,621 ports for 11,900 battery-electric cars, about seven cars per port. Plug-in hybrids (10,300) are nearly as common as fully electric cars here.

Drive on another fuel? See every alternative fuel station in Maine: hydrogen, propane, natural gas, E85 ethanol, biodiesel and renewable diesel.

Home charging is pricier than in most states. Using about 30 kWh per 100 miles (a typical fueleconomy.gov-style figure), 100 miles costs roughly $9.72 at the July 2026 average rate, around $97 for 1,000 miles, and cold weather raises use. That’s an estimate; a time-of-use plan or your own solar can lower it. Efficiency Maine’s Off-Peak Charger incentive pays $400 per residential Level 2 charger ($200 instantly and $200 after you set up the app), up to two per address, if the charger pauses from 5 to 9 pm on weekdays. Details are on the Efficiency Maine charger page; amounts change. The federal charger credit ended for chargers placed in service after June 30, 2026. Use the EV charging cost calculator and see EV charging at home.

Off-grid, small wind and micro-hydro

For off-grid camps, solar with batteries and a generator backstop is the practical setup. Small wind is weak inland: NASA’s coarse average near the state center is about 4.6 m/s at 50 meters and only about 2.5 m/s at 10 meters, below the 4.5 m/s the U.S. Department of Energy’s small wind guidebook suggests. The Portland area reads higher (about 6.4 m/s at 50 meters), so an exposed coastal site might be worth measuring. We haven’t checked a state source on micro-hydro. See off-grid power, wind energy and hydroelectric power.

Licensing and permits in Maine

Maine licenses master and journeyman electricians statewide through the Electricians’ Examining Board, part of the Office of Professional and Occupational Regulation. Check a license with the state license lookup (it needs cookies enabled in your browser). Remember that plug-in systems over 420 W must be installed by a Maine-licensed electrician. Permits come from your town or city, and grid-tied solar and batteries need CMP or Versant interconnection approval.

Where we cover in Maine

• Greater Portland: Portland, South Portland, Scarborough, Westbrook, Falmouth, Brunswick
• Lewiston–Auburn: Lewiston, Auburn
• Bangor: Bangor
• Southern Maine: Biddeford, Saco

Local pages will follow as we verify local information and installers for each area.

Get quotes in Maine

Tell us about your project and we will connect you with a licensed, independent installer who serves Maine. It is free, there is no obligation, and only the installer you choose gets your details. See how it works.

Maine energy FAQ

Does Maine have net metering?

Yes. Maine calls it Net Energy Billing, and home systems on Central Maine Power and Versant get a one-for-one kWh credit for power sent to the grid. A 2025 law (LD 1777) changed rules mainly for community and larger projects, and the new kWh-program charge from 2026 is zero for systems under 1 MW. Plug-in solar devices are excluded.

Is balcony or plug-in solar legal in Maine?

Yes. LD 1730, signed April 6, 2026, lets you install plug-in solar or plug-in batteries up to 420 W yourself. Systems from 420 W to 1,200 W per address need a Maine-licensed electrician, a dedicated circuit and notice to your utility within 30 days. Plug-in systems don’t receive net energy billing credits.

Why are power outages so long in Maine?

EIA’s 2024 data shows about 84% of Maine’s 1,749 outage minutes per customer came on major event days. FEMA rates winter weather and ice storms as relatively high risks for the state, and those storms can damage lines over wide areas at once. Even normal-day outages, 274 minutes, were among the longest in the country.

Does Efficiency Maine pay for EV chargers?

Yes. The Off-Peak Charger incentive pays $400 per residential Level 2 charger, $200 instantly and $200 after you set up the app, for up to two chargers per address. The charger must pause from 5 to 9 pm on weekdays. Check current terms on Efficiency Maine’s website before you buy.

Is solar worth it in Maine with so little sun?

Often, yes, because the price is so high. Maine’s sun gives roughly 1,100 kWh per kW of panels a year by our estimate, but at about 30 to 32¢ per kWh with one-for-one credits, each kW could offset roughly $330 to $355 a year. Shade, roof direction and snow change results, so get a site-specific estimate.

Sources

Electricity prices: EIA Electric Power Monthly Tables 5.6.A and 5.6.B, July 2026 (preliminary). Outages, utilities and solar counts: EIA-861, 2024. Sun and wind: NASA POWER climatology, 2001–2020; small wind threshold from the U.S. Department of Energy. Hazards: FEMA National Risk Index, December 2025. EVs and charging: Alternative Fuels Data Center (AFDC), registrations through 2025 and station counts read October 3, 2026. Net Energy Billing: Maine LD 1777 (2025) as summarized in our state dataset. Plug-in solar: Maine LD 1730, Public Law Chapter 644 (2026). Incentives: Efficiency Maine. Licensing: Maine Electricians’ Examining Board. Checked October 2026.