Peak sun hours in Maine (2026)
Maine averages 4.2 peak sun hours per day — 11% below the US average of 4.7. In practical terms, every 1 kW of solar there produces about 1,226 kWh of electricity a year.
Peak sun hours/day
4.2
Annual kWh per kW
1,226
vs US average
-11%
What this means for your system
To produce a given amount of electricity, you need fewer panels where there are more peak sun hours. At 4.2 hours, a typical home in Maine needs a system sized to its usage and local sun — see exact numbers on the Maine solar cost page or work it out with our sizing guide.
Peak sun hours in Maine: FAQ
How many peak sun hours does Maine get?
Maine averages about 4.2 peak sun hours per day — 11% below the US average. That works out to roughly 1,226 kWh of electricity per year for every 1 kW of solar installed.
Is Maine good for solar based on sunlight?
Sunlight is only part of the picture. Maine's 4.2 peak sun hours are below average, so panels produce a little less, but your electricity rate and incentives matter just as much. See the full economics on our Maine solar cost page.