Estimate savings
Solar by state

Solar in Montana

Across Montana, homeowners pay about 11.2¢/kWh and a typical 6 kW system pays back in roughly 15 years after the 30% federal tax credit.

State avg rate 11.2¢/kWh
Typical payback 15yrs
Best Solar Value Good

Counties in Montana

Carbon County
17.2¢/kWh · 8,196 kWh/yr
$1,411/yr 8.9 yr payback
Stillwater County
17.2¢/kWh · 8,052 kWh/yr
$1,387/yr 9.1 yr payback
Golden Valley County
15.6¢/kWh · 8,202 kWh/yr
$1,280/yr 9.8 yr payback
Rosebud County
15.7¢/kWh · 8,214 kWh/yr
$1,289/yr 9.8 yr payback
Wheatland County
15.6¢/kWh · 8,244 kWh/yr
$1,287/yr 9.8 yr payback
Carter County
14.4¢/kWh · 8,676 kWh/yr
$1,250/yr 10.1 yr payback
Musselshell County
15.6¢/kWh · 7,992 kWh/yr
$1,248/yr 10.1 yr payback
Treasure County
15.7¢/kWh · 7,950 kWh/yr
$1,247/yr 10.1 yr payback
Fergus County
15.6¢/kWh · 7,914 kWh/yr
$1,235/yr 10.2 yr payback
Powder River County
14.3¢/kWh · 8,424 kWh/yr
$1,206/yr 10.4 yr payback
Garfield County
12.4¢/kWh · 8,190 kWh/yr
$1,016/yr 12.4 yr payback
Valley County
12.7¢/kWh · 7,974 kWh/yr
$1,014/yr 12.4 yr payback
Liberty County
12.5¢/kWh · 8,046 kWh/yr
$1,009/yr 12.5 yr payback
Petroleum County
12.4¢/kWh · 8,130 kWh/yr
$1,009/yr 12.5 yr payback
Yellowstone County
12.5¢/kWh · 8,064 kWh/yr
$1,010/yr 12.5 yr payback
Blaine County
12.5¢/kWh · 7,944 kWh/yr
$996/yr 12.7 yr payback
Chouteau County
12.5¢/kWh · 7,914 kWh/yr
$992/yr 12.7 yr payback
Pondera County
12.5¢/kWh · 7,866 kWh/yr
$984/yr 12.8 yr payback
Teton County
12.5¢/kWh · 7,854 kWh/yr
$983/yr 12.8 yr payback
Hill County
12.5¢/kWh · 7,776 kWh/yr
$975/yr 12.9 yr payback
Daniels County
12.7¢/kWh · 7,536 kWh/yr
$959/yr 13.1 yr payback
Cascade County
11.6¢/kWh · 7,950 kWh/yr
$925/yr 13.6 yr payback
Phillips County
11.6¢/kWh · 7,926 kWh/yr
$918/yr 13.7 yr payback
Madison County
10.8¢/kWh · 8,490 kWh/yr
$913/yr 13.8 yr payback
Jefferson County
10.8¢/kWh · 8,160 kWh/yr
$877/yr 14.4 yr payback
Judith Basin County
10.8¢/kWh · 8,034 kWh/yr
$864/yr 14.6 yr payback
Wibaux County
10.3¢/kWh · 8,286 kWh/yr
$858/yr 14.7 yr payback
Deer Lodge County
10.8¢/kWh · 7,932 kWh/yr
$853/yr 14.8 yr payback
Granite County
10.8¢/kWh · 7,920 kWh/yr
$851/yr 14.8 yr payback
Lewis and Clark County
10.8¢/kWh · 7,914 kWh/yr
$851/yr 14.8 yr payback
Meagher County
10.8¢/kWh · 7,800 kWh/yr
$839/yr 15 yr payback
Sweet Grass County
10.2¢/kWh · 8,226 kWh/yr
$842/yr 15 yr payback
Gallatin County
10.8¢/kWh · 7,506 kWh/yr
$807/yr 15.6 yr payback
Big Horn County
9.8¢/kWh · 8,046 kWh/yr
$791/yr 15.9 yr payback
Park County
9.7¢/kWh · 8,118 kWh/yr
$790/yr 15.9 yr payback
Glacier County
9.9¢/kWh · 7,872 kWh/yr
$778/yr 16.2 yr payback
Mineral County
10.8¢/kWh · 7,260 kWh/yr
$780/yr 16.2 yr payback
Sanders County
10.8¢/kWh · 7,194 kWh/yr
$773/yr 16.3 yr payback
Broadwater County
9.3¢/kWh · 7,758 kWh/yr
$722/yr 17.5 yr payback
Fallon County
8.4¢/kWh · 8,484 kWh/yr
$714/yr 17.6 yr payback
Dawson County
8.4¢/kWh · 8,358 kWh/yr
$704/yr 17.9 yr payback
Roosevelt County
8.4¢/kWh · 8,298 kWh/yr
$699/yr 18 yr payback
Sheridan County
8.7¢/kWh · 8,028 kWh/yr
$695/yr 18.1 yr payback
Missoula County
9.3¢/kWh · 7,428 kWh/yr
$692/yr 18.2 yr payback
Custer County
8.4¢/kWh · 8,196 kWh/yr
$690/yr 18.3 yr payback
Powell County
9.3¢/kWh · 7,326 kWh/yr
$683/yr 18.4 yr payback
Prairie County
8.4¢/kWh · 8,136 kWh/yr
$685/yr 18.4 yr payback
McCone County
8.4¢/kWh · 7,962 kWh/yr
$670/yr 18.8 yr payback
Beaverhead County
7.9¢/kWh · 8,466 kWh/yr
$666/yr 18.9 yr payback
Lincoln County
9.4¢/kWh · 6,966 kWh/yr
$658/yr 19.1 yr payback
Richland County
8.0¢/kWh · 8,238 kWh/yr
$661/yr 19.1 yr payback
Ravalli County
8.4¢/kWh · 7,782 kWh/yr
$657/yr 19.2 yr payback
Toole County
7.9¢/kWh · 7,896 kWh/yr
$623/yr 20.2 yr payback
Silver Bow County
7.9¢/kWh · 7,830 kWh/yr
$616/yr 20.5 yr payback
Flathead County
8.0¢/kWh · 7,206 kWh/yr
$575/yr 21.9 yr payback
Lake County
6.7¢/kWh · 7,086 kWh/yr
$473/yr 26.6 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.