Montana Solar Estimate

Montana

Solar in Polson, Montana

A south-facing roof in Polson makes about 1,163 kWh per kW each year, 7% below the Montana average; a typical home's net-zero system here is about 9.3 kW, costs as low as $22,591 installed, and pays back in about 13 years on NorthWestern Energy rates.

See the numbers for your Polson address

At a glance

Sunlight per kW
1,163
kWh a year, 7% below the Montana average
Typical system
9.3 kW
net zero for 900 kWh a month
Installed cost
as low as$22,591
up to $27,611
Payback
as low as11.2 yrs
11.2–15 yrs at 2.7%/yr

Typical gas-heated home, 900 kWh a month, best-case figures with the range shown. Sources.

Who sends your bill

At the center of Polson the service-territory layer shows Mission Valley Power; NorthWestern Energy serves parts of the surrounding area. Boundaries are coarse at town edges, so your bill is the final word; the utility finder checks any address.

What the sun does in Polson

  • A south-facing roof at a 30° pitch makes about 1,206 kWh per kW a year before snow and 1,163 after a 4% snow allowance, 7% below the Montana average.
  • July is the best month at about 169 kWh per kW; January the worst at about 22. Net metering carries the summer surplus into winter, which is why the net-zero size and your utility’s bank reset month both matter.
  • Roof direction and pitch change the yield by a quarter or more; the estimate reads your actual roof from satellite imagery and fills south-facing planes first.
  • Electric heat roughly doubles a January bill compared with July, so a winter bill from an electrically heated house is annualized with a Montana heating profile rather than multiplied by twelve.

A typical Polson home: 900 kWh a month, gas heat

Net-zero system
9.3 kW
1163 kWh per kW per year
Installed cost
as low as$22,591
up to $27,611
First-year savings
up to$1,795
at least $1,575
Payback
as low as11.2 yrs
11.2–15 yrs at 2.7%/yr

Valued at NorthWestern Energy rates (15.8¢/kWh energy); no federal credit for homes in 2026. Your roof, usage and heating change every number.

Figures use NorthWestern Energy, which gives the better payback of the utilities serving the Polson area (Mission Valley Power: about 22 years). Your bill says which one you are on.

Questions Polson homeowners ask

How much do solar panels cost in Polson?
For a gas-heated home using about 900 kWh a month, a net-zero system of about 9.3 kW costs roughly $22,591 to $27,611 installed at current Montana cash prices, before any incentive. Larger homes and electric heat need bigger systems; your address gives a real figure in about a minute.
How long does solar take to pay for itself in Polson?
About 11.2 to 15 years for that typical home on NorthWestern Energy rates, assuming electricity prices rise 2.7% a year. NorthWestern Energy's own rules (fixed charge, net-metering credits) are built in. Figures use NorthWestern Energy, which gives the better payback of the utilities serving the Polson area (Mission Valley Power: about 22 years). Your bill says which one you are on.
Which utility serves Polson?
At the city centre the service-territory layer shows Mission Valley Power; NorthWestern Energy serves parts of the surrounding area. Boundaries are coarse at town edges, so your bill is the final word.
Does solar work in Polson's winters?
Yes, with a seasonal shape: July makes about 169 kWh per kW and January about 22, after a 4% allowance for snow cover. Net metering banks summer surplus against winter use, which is why the net-zero size and the bank's reset month both matter.
What incentives apply in 2026?
The 30% homeowner credit (Section 25D) ended for systems completed after December 31, 2025. Business-owned systems, including ranches and rental property, still qualify for the 30% investment credit and bonus depreciation when placed in service by the end of 2027; tax-exempt owners receive the 30% as cash. No Montana state credit. Not tax advice.

On the map

Montana-Dakota UtilitiesLincoln Electric CooperativeLower Yellowstone Rural Electric CooperativeMarias River Electric CooperativeMcCone Electric CooperativeMid-Yellowstone Electric CooperativeMissoula Electric CooperativeNorVal Electric CooperativeBeartooth Electric CooperativePark Electric CooperativeBig Flat Electric CooperativeSheridan Electric CooperativeBig Horn County Electric CooperativeSoutheast Electric CooperativeSun River Electric CooperativeTongue River Electric CooperativeCity of Troy ElectricMission Valley PowerYellowstone Valley Electric CooperativeFergus Electric CooperativeVigilante Electric CooperativeRavalli Electric CooperativeFlathead Electric CooperativeGlacier Electric CooperativeHill County Electric CooperativeNorthWestern Energy
Polson (gold) and NorthWestern Energy service territory. Hover a region to see its utility.

Nearby: Kalispell, Whitefish, Missoula, Hamilton, Cut Bank, Butte. All Montana cities.

Sources

Every figure on this page comes from the documents and models below, with the date each was produced or last checked.

  1. Sunlight and monthly production for Polson
    Effective October 31, 2026 · Checked October 31, 2026 · Read from the primary source
  2. NorthWestern Energy rates and net-metering rules (worked example)
    Effective October 15, 2026 · Checked November 1, 2026 · Read from the primary source
  3. Which utilities serve the area
    Checked October 31, 2026 · Read from the primary source
  4. Installed cost, savings and payback
    Checked November 1, 2026 · Read from the primary source

Spot an error? Email mtsolarestimate@gmail.com. How the estimate is built: methodology.

Your Polson address, your numbers

The estimate reads your roof, takes your real usage and applies your utility’s rules. About a minute, no contact details asked.