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Central Maine Power's supply rate hit 12.72¢/kWh in 2026 — up 20% from 2025 alone. Southern Maine homeowners from Portland to Kittery are paying $245/mo on average. There's a way to lock in a lower, fixed payment.
42%
Rate Increase Since 2020
12.72¢
2026 Supply Rate (/kWh)
+20%
Year-over-Year Increase
$245
Avg Monthly Bill (Portland)
CMP's standard offer supply rate has risen almost every year since 2020. Even the one year it dipped (2025), it came roaring back in 2026 with a 20% jump to 12.72¢/kWh — the highest supply rate in CMP history.
| Year | Supply Rate | Change |
|---|---|---|
| 2020 | 8.95¢/kWh | — |
| 2021 | 9.89¢/kWh | +10.5% |
| 2022 | 10.23¢/kWh | +3.4% |
| 2023 | 10.61¢/kWh | +3.7% |
| 2024 | 11.13¢/kWh | +4.9% |
| 2025 | 10.61¢/kWh | -4.7% |
| 2026CURRENT | 12.72¢/kWh | +19.9% |
At the current 3-5% annual rate increase trend, your $245/month bill could reach $320/month by 2030 and $420/month by 2035. Over 10 years, that is an additional $12,000+ in electricity costs compared to locking in a fixed rate today. Every month you wait, the gap between your CMP bill and a fixed solar payment grows wider.
Not all options are created equal. Here is an honest comparison.
LED lights, smart thermostat, better insulation. These are good habits but they only trim the edges.
Saves 10-15% but doesn't fix the rate problem. When CMP raises rates again, your bill goes right back up.
Subscribe to a solar farm for 10-15% bill credits. No panels on your roof.
Billing complaints are widespread, and LD 1777 (2023) cut compensation for new projects. No ownership, no control, and credits can change.
$0 down, fixed $184/mo payment — 25% less than your $245 CMP bill. Own the panels by year 5.
Unlike community solar, these are YOUR panels on YOUR roof with 1:1 NEB credits. American-made Silfab 440W panels. Fixed payment that never changes.
Learn About PropelEvery town in the Portland-south corridor is CMP territory with 1:1 NEB credits and 100% property tax exemption. Here is what homeowners in your town could save with Propel solar.
| Town | Avg CMP Bill | Propel Payment | Monthly Savings |
|---|---|---|---|
| Portland | $245/mo | $184/mo | $61/mo |
| South Portland | $240/mo | $180/mo | $60/mo |
| Scarborough | $255/mo | $191/mo | $64/mo |
| Saco | $235/mo | $176/mo | $59/mo |
| Biddeford | $230/mo | $173/mo | $57/mo |
| Kennebunk | $250/mo | $188/mo | $62/mo |
| Wells | $245/mo | $184/mo | $61/mo |
| York | $260/mo | $195/mo | $65/mo |
| Kittery | $255/mo | $191/mo | $64/mo |
Three steps to a lower, fixed electricity payment.
Tell us your monthly bill. We design a custom solar system sized to your usage. Takes 60 seconds.
Soft credit check only — won't affect your score. Minimum 660 credit score. Know your options in minutes.
$0 down. Fixed monthly payment. Own the panels by year 5. American-made Silfab 440W panels installed on your roof.
Propel financing requires FEOC-compliant (Foreign Entity of Concern) panels to qualify for the Section 48 commercial ITC. Silfab panels are manufactured in the USA with 440W output, 25-year warranty, and zero FEOC risk. This compliance is what makes the $0-down, fixed-payment model possible.
CMP rates have risen 42% since 2020 and show no signs of stopping. Portland-to-Kittery homeowners are locking in fixed $184/month solar payments — 25% less than the average CMP bill. See if you qualify in 60 seconds.
