How much does a heat pump cost per month in Maine?

About $53.26 a month, assuming 2,400 W at a 60% duty cycle, 10 hours a day, 150 days a year at 29.59¢/kWh.

How many kilowatt-hours does a heat pump use?

Roughly 2,160 kWh a year under these assumptions, or 1.44 kWh for every hour it runs.

Is that expensive compared with other states?

Maine has the 4th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $396 a year.

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Cost to run a heat pump in Maine (June 2026 rates)

At 29.59¢ per kilowatt-hour — Maine's average residential price in June 2026 — running a heat pump costs $639 a year. That is 61% more than the national average of $396. Maine's residential rate is up 5.2% from June 2025, which moves this appliance from $608 to $639 a year.

Per hour: 42.6¢
Per day of use: $4.26
Per month: $53.26
Per year: $639

Assumption: 2,400 W at a 60% duty cycle, 10 hours a day, 150 days a year — 2,160 kWh a year. A mid-size ducted heat pump in heating mode. It moves heat rather than making it, delivering two to four units of heat per unit of electricity until the outdoor temperature drops far enough to trigger backup resistance strips. Use the calculator to swap in the numbers from your own model.

How Maine compares

Maine pays 29.59¢/kWh, the 4th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $243 more a year than the typical U.S. household pays for the same use. Running the same heat pump costs $283 a year in Nevada and $1,139 in Hawaii, so where you live changes this bill by $856 a year.

State	Rate	Per month	Per year
Rhode Island	29.23¢	$52.61	$631
New York	29.49¢	$53.08	$637
Maine	29.59¢	$53.26	$639
Massachusetts	29.61¢	$53.30	$640
California	34.74¢	$62.53	$750

States ranked by average residential price, cheapest first. See all 51 states for a heat pump.

What else costs about the same in Maine

Central air conditioner$696 a year in ME Hot tub$740 a year in ME Pool pump$511 a year in ME

Cutting the number down

Auxiliary resistance heat is the expensive mode. Big thermostat setbacks trigger it on recovery, so a steady setting usually beats aggressive setbacks.
Cold-climate models hold useful capacity well below freezing; older units fall back to strips much sooner.
Keeping the outdoor coil clear of snow, leaves and shrubs protects the efficiency you paid for.

Questions

How much does a heat pump cost per month in Maine?: About $53.26 a month, assuming 2,400 W at a 60% duty cycle, 10 hours a day, 150 days a year at 29.59¢/kWh.
How many kilowatt-hours does a heat pump use?: Roughly 2,160 kWh a year under these assumptions, or 1.44 kWh for every hour it runs.
Is that expensive compared with other states?: Maine has the 4th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $396 a year.