ME · Maine

Maine's utility stack is thinner, but the rebates run deep.

Maine works differently from the rest of New England. Almost every state-side rebate runs through Efficiency Maine Trust, an independent statewide administrator, not the utilities themselves. CMP and Versant Power split the state geographically: CMP covers the southern half, Versant the northern. The utility-side stack is leaner than Massachusetts, but Efficiency Maine's heat pump rebates are among the most generous in the region, and Net Energy Billing still pays full retail. Here's what each utility offers, in 2026.

ME · Utilities

A rural Maine neighborhood at late afternoon, white-clapboard farmhouse-style homes set back from a country road with distribution lines running pole-to-pole along the shoulder

~$0.27–$0.32/kWh

Avg residential rate · CMP to Versant

$3,000/unit

Efficiency Maine HP rebate · low-income tier

1:1 retail

Net Energy Billing credit value

The one most homeowners miss

Efficiency Maine's heat pump rebate stacks up to three units, putting $9,000 on the table for a low-income whole-home install.

The standard rebate is $1,000 per heat pump, but it tiers up by income: $2,000/unit at moderate income (80-150% AMI), $3,000/unit at low income (under 80% AMI). And it stacks: up to three units per home. That's a $3,000, $6,000, or $9,000 total rebate, before any federal credit, on the same hardware. Whole-home ducted systems run the same tier structure at $3,000 to $9,000 per system. Available identically across CMP and Versant territories, since Efficiency Maine is statewide.

Utility	Heat pumps	Solar	Storage	Insulation	Windows
Central Maine Power	2★	1★	1	1
Versant Power	2	1★	1	1

Utility · 1 of 2

Central Maine Power (CMP)

CMP is the larger of Maine's two investor-owned utilities, serving roughly 650,000 customers across southern and central Maine, including Portland, Augusta, and Lewiston. CMP's retail rate runs around $0.27/kWh, lower than Versant's, which means lower operating cost on heat pumps but slightly less net-metering value per exported kWh.

Heat pumps · 2 programs

Efficiency Maine Heat Pump RebateFlagship

$1,000–$3,000/unit · up to 3

Tiered by income: $1,000/unit standard, $2,000/unit moderate income (80-150% AMI), $3,000/unit low income (under 80% AMI). Stacks up to three units per home, for a total of $3,000, $6,000, or $9,000. Whole-home ducted systems pay $3,000 to $9,000 per system on the same income tiers. Available identically in CMP and Versant territories.

Efficiency Maine residential heat pump rebates →

CMP-specific heat pump rate

Not yet offered

CMP does not currently offer a heat-pump-specific seasonal tariff. Standard residential rate (around $0.27/kWh) applies. CMP customers should monitor the rate-tariff page for any future heat pump rate filing similar to Eversource MA's R-1HP.

CMP rates page →

Solar · 1 program

Net Energy Billing (NEB)Flagship

~$0.27/kWh · 1:1 retail

Full retail-rate credit for residential rooftop solar at approximately $0.27/kWh. Excess credits roll over month-to-month with a 12-month rollover window; true-up at avoided cost. Rooftop NEB was unaffected by 2026 LD 1777, which only modified community solar rules.

CMP Net Energy Billing →

Energy storage · 1 program

ConnectedSolutions in Maine

~$225/kW summer · ~$50/kW winter

Operated by Efficiency Maine, available across both CMP and Versant territories. Approximately $225/kW for the summer season (June through September) plus around $50/kW for the winter season (December through March) for a typical residential battery. [NEEDS RESEARCH, Efficiency Maine is the program operator, not CMP directly; current 2026 per-kW rates and event caps are not consistently published in public-facing utility-side docs.]

Efficiency Maine ConnectedSolutions →

Insulation & weatherization · 1 program

Efficiency Maine Home Energy Savings Program

Up to $5,000–$7,500

Efficiency Maine pays up to roughly $5,000 to $7,500 per home for insulation and air-sealing work, with the upper end available to income-eligible households. Available statewide, identical terms in CMP and Versant territory.

Efficiency Maine weatherization →

Windows & doors · no utility rebate

No utility rebate available

CMP does not offer a windows/doors rebate, and Efficiency Maine does not run one either. The federal 25C credit (up to $600/year for windows) expired Dec 31, 2025 with no replacement. Inherent ROI (utility savings, comfort, resale value) is the case for the upgrade.

Utility · 2 of 2

Versant Power

Versant Power serves roughly 159,000 customers across northern and eastern Maine, including Bangor, Presque Isle, and most of Aroostook, Hancock, and Washington counties. Versant's retail rate runs around $0.32/kWh, the highest in Maine, which means net-metering credits are worth more per kWh and solar payback is meaningfully faster than in CMP territory.

Heat pumps · 2 programs

Efficiency Maine Heat Pump Rebate

$1,000–$3,000/unit · up to 3

Identical schedule to CMP territory: $1,000/unit standard, $2,000/unit moderate income, $3,000/unit low income; stacks up to three units. Versant's higher retail rate (~$0.32/kWh) means the heat pump operating cost runs higher than in CMP territory, but the rebate side is the same.

Efficiency Maine residential heat pump rebates →

Versant-specific heat pump rate

Not yet offered

Versant does not currently offer a heat-pump-specific discounted tariff. [NEEDS RESEARCH, no Versant-specific HP tariff filing identified.] Standard residential rate applies.

Versant Power rates →

Solar · 1 program

Net Energy Billing (NEB)Best in ME

~$0.32/kWh · 1:1 retail

Full retail-rate credit at approximately $0.32/kWh, the highest in Maine. Same rules as CMP: month-to-month rollover, 12-month window, true-up at avoided cost. Solar payback runs faster in Versant territory because each exported kWh is worth more.

Versant Power Net Energy Billing →