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How Much to Run a Mini Split in Maine? $0.60/Hr, $1,886/Winter

Running ductless mini-split in Maine costs about $0.60 an hour and roughly $1,886 for the winter — 2,000 W for 17.4 hours a day at 29.81¢/kWh.

$0.60per hour
$1,886per winter, 182 days
6,471heating degree-days, NOAA

· Source: EIA Electric Power Monthly Table 5.6.A (July 2026 data) · next EIA update ~Oct 23

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Ductless mini-split in Maine: watts ÷ 1,000 × hours × days × rate. Estimate, not a quote.
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Per hour
$0.60 at 29.81¢/kWh
Per winter
$1,886 (182 days)
Hours per day
17.4 (NOAA state heating degree-days-scaled)
Degree-days used
6,471 (NOAA CPC state, population-weighted)
Wattage
2,000 W (typical 400–3,500)
Maine rate
29.81¢ (October 2025–March 2026 average)
Rank of 20 cold states
1 (most expensive)

Why this number

Running ductless mini-split in Maine costs about $0.60 an hour and roughly $1,886 for the winter — a 2,000 W unit for 17.4 hours a day over 182 days (October–March) at Maine’s October 2025–March 2026 average average of 29.81¢/kWh. The hours are the national 9.4 h/day baseline scaled by NOAA CPC state population-weighted HDD, October 2025–March 2026 (6,471 vs the CONUS 3,500); your utility’s rate moves it (table below), and the calculator takes your own wattage, hours and rate.

Maine runs ductless mini-split longer than the national baseline in October–March — 17.4 hours a day on the NOAA state degree-day scaling used here, against 9.4 nationally — and pays 29.81¢/kWh for it. Those two numbers, times 2,000 W, are the whole $1,886.

Ductless mini-split cost in Maine by hours per day — per day / per winter

Ductless mini-split cost per day and per winter in Maine at 1 to 12 hours a day, at the state average rate and its largest utilities' EIA-861 prices
Hours per day Maine avg 29.81¢ Central Maine Power Co 22.4¢ Versant Power 27.5¢ Electricity Maine, LLC 16.8¢
1 h $0.60 / $109 $0.45 / $82 $0.55 / $100 $0.34 / $61
2 h $1.19 / $217 $0.90 / $163 $1.10 / $200 $0.67 / $122
4 h $2.38 / $434 $1.79 / $326 $2.20 / $400 $1.34 / $245
6 h $3.58 / $651 $2.69 / $489 $3.30 / $601 $2.02 / $367
8 h $4.77 / $868 $3.58 / $652 $4.40 / $801 $2.69 / $489
12 h $7.15 / $1,302 $5.38 / $978 $6.60 / $1,201 $4.03 / $734

What Maine’s utilities charge for it

Maine's largest electric utilities and what ductless mini-split costs per hour and per winter at each one's average price
Utility Residential customers ¢/kWh (EIA-861 2024) Per hour Per winter at 17.4 h/day
Central Maine Power Co 577,955 22.4¢ $0.45 $1,417
Versant Power 137,906 27.5¢ $0.55 $1,740
Electricity Maine, LLC 17,749 16.8¢ $0.34 $1,063

What the numbers say about ductless mini-split in Maine

Maine logged 6,471 population-weighted heating degree-days over October–March (NOAA CPC state series), 185% of the CONUS figure of 3,500, which is why this page runs ductless mini-split 17.4 hours a day against the national 9.4 — 8.0 hours more. At Maine’s October 2025–March 2026 average rate of 29.81¢/kWh that makes it the most expensive of the 20 cold states for ductless mini-split: $1,886 for the 182-day winter, against Nebraska’s $552 and Maine’s $1,886. Central Maine Power Co, Maine’s largest utility with 577,955 residential customers, averages 22.4¢ — $1,417 for the same hours — while Electricity Maine, LLC at 16.8¢ comes to $1,063, a $354 spread on identical use. Per million Btu delivered, this unit at the NEEP median COP of 2.17 costs $40.26 against $19.89 for natural gas at Maine’s winter average of $1.89/therm, which is the whole-house comparison the Maine heating page works through. Maine’s winter-average rate (29.81¢) sits 2.60¢ below its July 2026 reading of 32.41¢; the season figure uses the winter average because that is when ductless mini-split runs.

Frequently asked questions

How much does it cost to run ductless mini-split per hour in Maine?

$0.60 an hour for a 2,000 W unit at Maine’s October 2025–March 2026 average average of 29.81¢/kWh (2,000 ÷ 1,000 × 0.2981); at Central Maine Power Co’s 22.4¢ it is $0.45.

How much does ductless mini-split cost for the whole winter in Maine?

About $1,886: 2,000 W × 17.4 hours a day × 182 days (October–March) × 29.81¢. The hours are the national 9.4 h/day scaled by NOAA CPC state population-weighted HDD, October 2025–March 2026 (6,471 against the CONUS 3,500); enter your own hours above for your own figure.

Is ductless mini-split expensive to run in Maine compared with other cold states?

Maine is the most expensive of the 20 cold states on this site at $1,886 a winter; the range runs from Nebraska ($552) to Maine ($1,886), driven almost entirely by the electricity rate.

How we calculated this

Worked for ductless mini-split in Maine: 2,000 W ÷ 1,000 × 0.2981 $/kWh = $0.60 per hour; hours per day = 9.4 × (6,471 ÷ 3,500) = 17.4; 2,000 ÷ 1,000 × 17.4 × 182 × 0.2981 = $1,886 for the winter. Rate: EIA Electric Power Monthly 5.6.A (October 2025–March 2026 average); degree-days: NOAA CPC state population-weighted HDD, October 2025–March 2026, against the CONUS total; utility prices: EIA-861 2024.

Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.

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