Solar by state

Solar in Maine

Across Maine, homeowners pay about 10.1¢/kWh and a typical 6 kW system pays back in roughly 19.3 years after the 30% federal tax credit.

State avg rate 10.1¢/kWh

Typical payback 19.3yrs

Best Solar Value Excellent

Counties in Maine

28.3¢/kWh · 7,812 kWh/yr

$2,212/yr 5.7 yr payback

Aroostook County

14.7¢/kWh · 7,422 kWh/yr

$1,088/yr 11.6 yr payback

Franklin County

14.7¢/kWh · 7,350 kWh/yr

$1,078/yr 11.7 yr payback

Piscataquis County

14.7¢/kWh · 7,374 kWh/yr

$1,081/yr 11.7 yr payback

9.1¢/kWh · 7,716 kWh/yr

$701/yr 18 yr payback

Washington County

9.1¢/kWh · 7,446 kWh/yr

$678/yr 18.6 yr payback

Penobscot County

9.1¢/kWh · 7,356 kWh/yr

$669/yr 18.8 yr payback

6.9¢/kWh · 8,022 kWh/yr

$557/yr 22.6 yr payback

Androscoggin County

6.9¢/kWh · 7,854 kWh/yr

$545/yr 23.1 yr payback

Cumberland County

6.9¢/kWh · 7,854 kWh/yr

$545/yr 23.1 yr payback

6.9¢/kWh · 7,800 kWh/yr

$541/yr 23.3 yr payback

Kennebec County

6.9¢/kWh · 7,716 kWh/yr

$535/yr 23.6 yr payback

Sagadahoc County

6.9¢/kWh · 7,566 kWh/yr

$525/yr 24 yr payback

6.9¢/kWh · 7,506 kWh/yr

$521/yr 24.2 yr payback

6.9¢/kWh · 7,500 kWh/yr

$521/yr 24.2 yr payback

Somerset County

6.9¢/kWh · 7,410 kWh/yr

$514/yr 24.5 yr payback

Figures are modeled estimates from NREL PVWatts v8 + EIA. Not affiliated with NREL, DOE or EIA · not financial advice. Last updated June 2026.