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4 energy suppliers serve Maine
4 compete for your electricity supply. Tap any logo for plans, rates and reviews.
Step 1 of your switch
Find your Maine utility
Your wires utility is set by your address. Two IOUs (CMP, Versant) cover most of Maine; a handful of consumer-owned utilities serve specific towns and the Down East coast.
Investor-owned · IOU
Central Maine Power
CMP · Avangrid subsidiary
Southern, central and western Maine (11 counties)
Owns the wires for the lower two-thirds of the state.
Investor-owned · IOU
Versant Power
formerly Emera Maine
Bangor Hydro + Maine Public districts (eastern + northern ME)
Sold by Emera (Nova Scotia) to Enmax (Calgary) in 2020.
Cooperative · member-owned
Eastern Maine Electric
Member-owned cooperative
Washington & Hancock counties (Down East)
Headquartered in Calais, the easternmost utility in the US.
Municipal / consumer-owned
Houlton Water Company
Consumer-owned electric + water
Town of Houlton (Aroostook County)
Provides both electric service and municipal water.
Municipal / consumer-owned
Kennebunk Light & Power
KLPD · since 1894
Towns of Kennebunk, Kennebunkport and Arundel
Operated continuously since the 19th century.
Municipal / consumer-owned
Van Buren Light & Power
Town-owned utility
Town of Van Buren (Aroostook County)
On the Saint John River, on the Canadian border.
Maine is one of the smallest electric markets in the US. Only a handful of pages are profiled today, the rest are listed for context. Compare with Massachusetts or New Hampshire.
Why your address matters
Two IOUs, one co-op, four municipals
Maine has a small but unusually diverse utility map. Most of the state is served by two investor-owned utilities, with consumer-owned pockets in the Down East coast and three Aroostook County towns.
Investor-owned
CMP & Versant
Private regulated companies overseen by the Maine Public Utilities Commission. They own the wires (delivery), procure the Standard Offer default supply at PUC-run auction and let you swap that supply for a competitive offer.
- Competitive supplier choice fully open.
- 24/7 outage lines run by the IOU, not your competitive supplier.
~810K ME meters in IOU territory.
Cooperative
Eastern Maine Electric
A single rural cooperative, member-owned and not-for-profit, born under the 1936 Rural Electrification Act. Members vote on the board and any margin above cost flows back as capital credits.
- Competitive supplier choice is allowed for ME co-op members.
- Rates and policy set by an elected board of members.
~13K ME member-accounts (Washington & Hancock counties).
Consumer-owned
Houlton, Kennebunk, Van Buren, Madison
A handful of Maine towns run their own electric utility. The town owns the wires and the supply, rates are set by a local utility board, not the PUC. Retail choice does not apply inside town limits.
- No competitive supplier choice. Town is your supplier.
- Rates set at cost by a local board you can vote for.
~12K ME meters in town-owned territory.
How ME customer choice works
From the meter to the supplier in 3 moves
Every Maine bill has two halves: delivery (the wires, owned by your utility) and supply (the kilowatt-hours, where the market opens up). Here is how to navigate both.
Identify your utility
Look at the top of your bill or check by town. CMP covers southern, central and western Maine, Versant covers the Bangor Hydro and Maine Public districts (east and north), and the rest is co-op or town-owned.
Pick your utility aboveCheck your Standard Offer
If you don't shop, your utility supplies you at the PUC-auctioned Standard Offer Service rate. Residential SOS is reset annually for CMP and Versant, with the new rate effective every 1 January.
See current ME pricesSwitch or stay
Pick a licensed competitive supplier from the Maine PUC list and sign up directly. Same wires, same meter, same outage line, just a different supply line on the bill. Switching is free and never interrupts service.
Compare suppliersThree reasons ME households shop their supply
Same electrons. Same lines. Same outage crew. The only thing that changes is the supply price on one line of your bill.
Outrun the SOS auction lag
Because the Standard Offer is locked in months ahead of January, it lags the spot market. When wholesale prices fall, your utility keeps charging the old SOS rate until the next reset. A fixed competitive plan can capture today's price.
Lock a rate for 12 to 36 months
A fixed competitive plan removes the annual SOS surprise. Useful for budgeting, especially after the winter 2022 to 2023 cycle when Maine residential Standard Offer jumped by more than 80 percent in CMP territory.
Push beyond the RPS floor
Maine's Renewable Portfolio Standard targets 80% renewables by 2030 and 100% clean by 2050. Competitive 100% renewable plans push above the current floor, often near parity with SOS, while supporting in-state hydro, wind and solar.
Quick answers about ME energy
The most common questions households ask before they pick up the phone.
Your utility is set by where you live. Central Maine Power (CMP) covers the southern, central and western parts of the state (Portland, Lewiston, Augusta, Waterville, Farmington). Versant Power covers Bangor, Ellsworth, Houlton, Presque Isle and most of the east and north. Eastern Maine Electric Coop serves the Down East coast (Washington and Hancock counties). The towns of Van Buren, Houlton, Kennebunk, Kennebunkport, Arundel and Madison run their own electric utility.
Standard Offer Service is the default supply price your investor-owned utility charges if you do nothing. It is procured at auction by the Maine Public Utilities Commission and resold at cost (no profit margin). For residential customers, the rate is reset on a 12-month cycle, effective every 1 January. Commercial customers see a different schedule.
Sometimes yes, sometimes no. Door-to-door pitches often quote a teaser rate that flips to a much higher variable rate after a few months. Always compare a fixed-rate offer to the current Standard Offer, including any monthly fees, and read the termination clause. When the spread is real and the contract is clean, ME households can shave 10 to 20 percent off the supply line.
Retail choice does not apply inside Maine's consumer-owned utility towns. Kennebunk Light & Power, Houlton Water Company, Van Buren Light & Power and Madison Electric Works are both your wires utility and your supply, at rates set by their local board. Cross the town line and you become a CMP or Versant customer with full choice.
Always your delivery utility, never your competitive supplier. CMP: 1-800-696-1000. Versant Power: 1-855-363-7211. Eastern Maine Electric: (207) 454-7555. Van Buren L&P: (207) 868-3321. The outage line stays the same whether or not you have switched suppliers.
CallMePower is a free independent comparison service. We never charge consumers and we do not tilt our directories to favor a single supplier. Our Maine pages list incumbent utilities, town-owned utilities and competitive suppliers so households can see the full landscape.
Keep learning
More U.S. states with energy choice
Same playbook, different utility. Pick another deregulated state to compare utilities, suppliers and switching rules.
