Solar in Lewiston: What Homeowners Should Know
Lewiston sees an average of 4.2 peak sun hours per day, which is what ultimately determines how much electricity a rooftop system produces here. A standard 8 kW system (about 20 panels) generates roughly 9,811 kWh each year in Lewiston — and paired with Maine's local electricity rate of $0.209/kWh, that's where the savings come from.
At those numbers, a Lewiston homeowner saves about $171/month ($2,051/year). Against a $27,200 system cost, that works out to a payback of about 13.3 years, after which the system produces essentially free power for two decades — an estimated $42,842 in lifetime savings. Note: the 30% federal tax credit expired at the end of 2025 for purchased systems, though a solar lease or PPA can still pass it through. The local grid is served by Central Maine Power, whose net metering policy directly affects how much credit you earn for surplus power.
Cost & Savings Breakdown
Based on a standard 8 kW system in Lewiston
25-Year Savings Projection
Utility & Net Metering
Available Incentives
Choosing a Solar Installer in Lewiston
- 1.Get at least 3 quotes. Prices in Maine vary widely between installers — comparing bids on the same 8 kW system is the fastest way to avoid overpaying.
- 2.Confirm Central Maine Power interconnection experience. An installer who regularly files with your local utility will move your permit and net-metering paperwork through faster.
- 3.Check licensing & the warranty. Look for NABCEP-certified installers and a workmanship warranty of 10+ years on top of the standard 25-year panel warranty.
- 4.Size for your actual usage. With 4.2 sun hours/day in Lewiston, make sure the proposed system matches your kWh history — not just your roof space.
Common Questions
How much does solar cost in Lewiston?
Solar in Lewiston, Maine costs approximately $27,200 for a 8 kW system. The 30% federal tax credit expired December 31, 2025 for purchased systems, though solar leases and PPAs can still pass it through.
What is the solar payback period in Lewiston?
The estimated payback period for solar in Lewiston is 13.3 years for a standard 8 kW system, based on local sun hours of 4.2 hrs/day and a rate of $0.209/kWh.
Is solar worth it in Lewiston?
For most Lewiston homeowners, yes. With 4.2 peak sun hours per day and an electricity rate of $0.209/kWh, a typical system saves $2,051 per year and around $42,842 over 25 years after paying for itself in 13.3 years.
How many solar panels do I need in Lewiston?
A standard 8 kW home solar system is about 20 panels, producing roughly 9,811 kWh per year in Lewiston at 4.2 sun hours/day. Your exact size depends on your household's electricity use.
Does Central Maine Power offer net metering?
Central Maine Power offers Full Retail net metering. Full retail rate.