Quick Answer
Central Maine Power currently charges $0.2700/kWh, up 6.0% year-over-year. An 8 kW solar system saves approximately $2,592/year at this rate.
Last verified: March 2, 2026. Sources: EIA Form 861, Central Maine Power rate filings, state PUC dockets, and NuWatt solar production assumptions.
Central Maine Power Electricity Rate Tracker 2026
Track Central Maine Power's residential electricity rates over time and see how rate changes impact solar panel savings for Maine homeowners.
Current Residential Rate
$0.2700/kWh
Service Territory
Southern and central Maine
Customers
650K
Rate Type
regulated
Primary State
Maine
Rate History
Central Maine Power's residential electricity rate from January 2024 to the present. The orange bar represents the current rate.
Rate History Details
| Month | Rate ($/kWh) | Change | Source |
|---|---|---|---|
| January 2026Current | $0.2700 | +2.5% | CMP standard offer rate |
| June 2025 | $0.2635 | +3.4% | EIA Form 861 |
| January 2025 | $0.2548 | +4.3% | CMP standard offer rate |
| June 2024 | $0.2442 | +5.0% | EIA Form 861 |
| January 2024 | $0.2325 | -- | EIA Form 861 |
What Central Maine Power Rates Mean for Solar
Based on Central Maine Power's current rate of $0.2700/kWh, here is what an average 8 kW residential solar system delivers in savings. These figures assume a system cost of $3.10/W with no federal tax credit (expired Dec 2025), 1,200 kWh/kW annual production, and 0.4% annual panel degradation.
$2,592
8 kW system at current rate
9.6 years
Cash purchase, no ITC
$89,391
3% annual rate escalation
Frequently Asked Questions
What is CMP's current electricity rate?
How much have CMP rates increased?
How much can I save with solar on CMP?
Does CMP offer net metering in Maine?
Lock In Your Savings Before Rates Rise Again
Central Maine Power rates have risen 6.0% over the past year. Solar lets you generate your own electricity and protect against future increases. Get a free custom estimate for your home.
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