Montana
Solar in Butte, Montana
A south-facing roof in Butte makes about 1,259 kWh per kW each year, about the Montana average; a typical home's net-zero system here is about 8.6 kW, costs as low as $21,300 installed, and pays back in about 12 years on NorthWestern Energy rates.
See the numbers for your Butte address
At a glance
Typical gas-heated home, 900 kWh a month, best-case figures with the range shown. Sources.
Who sends your bill
At the center of Butte the service-territory layer shows NorthWestern Energy. Boundaries are coarse at town edges, so your bill is the final word; the utility finder checks any address.
What the sun does in Butte
- A south-facing roof at a 30° pitch makes about 1,323 kWh per kW a year before snow and 1,259 after a 5% snow allowance, about the Montana average.
- July is the best month at about 165 kWh per kW; December the worst at about 37. 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 Butte home: 900 kWh a month, gas heat
Valued at NorthWestern Energy rates (15.8¢/kWh energy); no federal credit for homes in 2026. Your roof, usage and heating change every number.
Questions Butte homeowners ask
- How much do solar panels cost in Butte?
- For a gas-heated home using about 900 kWh a month, a net-zero system of about 8.6 kW costs roughly $21,300 to $26,034 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 Butte?
- About 10.7 to 14.2 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.
- Which utility serves Butte?
- At the city centre the service-territory layer shows NorthWestern Energy. Boundaries are coarse at town edges, so your bill is the final word.
- Does solar work in Butte's winters?
- Yes, with a seasonal shape: July makes about 165 kWh per kW and December about 37, after a 5% 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
Nearby: Helena, Dillon, Belgrade, Bozeman, Hamilton, Missoula. 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.
- Sunlight and monthly production for ButteEffective October 31, 2026 · Checked October 31, 2026 · Read from the primary source
- NorthWestern Energy rates and net-metering rules (worked example)Effective October 15, 2026 · Checked November 1, 2026 · Read from the primary source
- Which utilities serve the areaChecked October 31, 2026 · Read from the primary source
- Installed cost, savings and paybackChecked November 1, 2026 · Read from the primary source
Spot an error? Email mtsolarestimate@gmail.com. How the estimate is built: methodology.
Your Butte 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.