Solar in Montana: market, NorthWestern Energy and net metering

Market snapshot

Solar in Montana by the numbers

Installed capacity

140 MW

Homes powered

23K

Solar share of electricity

1%

Solar jobs in state

300

Typical cost per watt

$2.80

US ranking

#44

Montana's residential solar market is small but growing. Billings, Missoula and Bozeman metros dominate residential. Co-op territory covers much of rural Montana with varied interconnection rules. The federal tax credit is the primary driver; retail electric rates are moderate.

Rates and net metering

Electric rates and how solar export is credited

Incentives

State and local solar incentives in Montana

Beyond the 30 percent federal Residential Clean Energy Credit, which applies in every US state through 2032, Montana has these state and local programmes.

Montana Alternative Energy Systems Tax Credit

Montana offers a state income tax credit of up to $500 per taxpayer ($1,000 for joint filers) for residential renewable energy systems. For most residential solar installations, the credit value is modest relative to the federal tax credit. Stacks with the 30 percent federal credit.

Property-tax exemption

Montana exempts up to $20,000 of the added value of residential renewable energy systems from property-tax assessment under MCA 15-6-224 for a 10-year period.

No state sales-tax (no sales tax)

Montana has no statewide sales tax, so solar equipment is already not subject to sales tax by default. No separate exemption needed.

Permits and interconnection

Permits and interconnection

Permit timelines in Montana vary by jurisdiction. Billings, Missoula and Bozeman commonly take 2 to 5 weeks for residential. Rural counties and smaller cities can be faster. SolarAPP+ is not accepted. Interconnection with NorthWestern Energy typically runs 4 to 6 weeks post-install.

Running a solar company here

Running a solar company in Montana

Running a solar company in Montana means working in a market where winter weather is the dominant climate factor. The best Montana operators are explicit about winter snow derating in sales conversations (annual production loss 15 to 25 percent), handle co-op territory interconnection differences (each co-op operates under its own tariff), and understand the long-driving-distance logistics of the state. Lead costs run $85 to $160 on Google search.

Cities we cover

Solar in Montana metros

• Solar in Billings

Questions people ask

Solar in Montana: FAQ

Does Montana have net metering?

Yes, retail-rate net metering for residential solar systems up to 50 kW AC at NorthWestern Energy under Montana PSC rules. Co-op territory customers operate under cooperative-specific tariffs that vary.

How much does solar cost in Montana?

Residential solar in Montana averages around $2.80 per watt installed, meaning a typical 7 kW system costs about $19,600 gross. After the 30 percent federal tax credit and the modest Montana state tax credit, net cost is approximately $13,200.

Is solar worth it in Montana?

Yes for most Montana homes with suitable roofs. The combination of retail NEM at NorthWestern Energy, moderate electric rates, and the 30 percent federal credit makes residential solar payback typically 11 to 14 years. Winter snow derating stretches payback; honest annual yield modelling matters.