Solar Panels in Waterville, ME: Cost, Payback & Savings
A typical 5.6 kW home solar system in Waterville costs about $20,160 and pays for itself in about 8.9 years, saving roughly $46,491 over 25 years at Maine's average electricity price of 30.0¢/kWh.
Monthly solar production in Waterville
Estimated output of a 5.6 kW south-facing roof system. Jul is the strongest month (782 kWh); Dec the weakest (309 kWh).
Solar production (kWh) Typical home use, 550 kWh/month
Solar payback calculator for Waterville
Pre-filled with Waterville's sunshine and Maine's average electricity price. Enter your own bill and an installer's price per watt to see your payback.
Leave export credit blank where the utility offers full net metering. Where exports earn less, solar used at home as it's produced is worth the full price and the rest earns the export credit.
How Waterville compares
- Each kW of panels here produces about 1,241 kWh a year — 3% less than the Maine median and 9% less than the US median city (1,371 kWh).
- Payback ranks #18 of 21 Maine places we cover.
- Sunshine varies little across a state; electricity price, installed cost and how utilities credit exported power drive most of the difference between states.
Net metering, tax credits and incentives in 2026
Maine offers net metering: power you send to the grid is credited at or near the retail price, so every solar kWh is valued at 30.0¢ here.
There is no federal tax credit for buying home solar installed in 2026. The 30% Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025, so the costs and paybacks on this page include no federal credit.
Maine and local utilities may still offer rebates, performance payments, property-tax or sales-tax exemptions. Search the DSIRE incentives database for Maine and ask installers which programs they apply for you.
Frequently asked questions
Is solar worth it in Waterville, ME?
For a typical home, a solar system pays for itself in about 8.9 years and then keeps saving money. Over 25 years the estimated net savings are $46,491. Verdict: strong investment. Your own payback depends on your roof, your bill and the quotes you get.
How many solar panels do I need in Waterville, ME?
A home using 550 kWh a month (the Maine average) needs about 14 panels of 400 W — a 5.6 kW system — to cover its annual use. Divide your own yearly kWh by 1,241 to get the kW you need.
How much do solar panels cost in Waterville, ME?
At 3.60 dollars per watt, a 5.6 kW system costs about $20,160 before any state or utility incentives. There is no federal tax credit for systems installed in 2026.
How much sun does Waterville get?
Waterville averages 4.5 peak sun hours per day, so each kilowatt of panels produces about 1,241 kWh a year.
Does Maine have net metering?
Yes. Power sent back to the grid is credited at or near the retail price (30.0¢ per kWh on average).
How much does electricity cost in Maine?
Residential electricity in Maine averages 30.0¢ per kWh, and a typical home uses 550 kWh a month (EIA).