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Montana Solar Cost Calculator

Estimate the cost and payback of a residential solar system in Montana. Adjust system size, installed price, value captured and verified incentives using transparent 2026 planning data.

Federal residential solar credit in 2026: $0. CalcuRiver does not subtract the expired 30% Section 25D credit from this estimate. Add only local or utility incentives you have independently verified.
State planning yield1,339 kWh/kW
Installed-cost benchmark$2.52/W
Federal credit assumed0%
Electricity rateloading…
2026 state snapshot

What changes in Montana

Montana's residential electricity rate is 18.1% below the U.S. average. Combined with a planning yield of 1,339 kWh/kW-year and a $3/W installed-cost benchmark, the same 8 kW system produces a different state-level cost and value profile.

View Montana electricity rates →
Residential electricity rate14.99¢/kWh18.1% below U.S. average
8 kW annual production10,712 kWh1,339 kWh/kW planning yield
8 kW gross benchmark cost$20,160$3/W planning benchmark
Annual value at full retail$1,606$134/month equivalent
Simple payback at full retail12.6 yearsBefore financing and unverified incentives
Existing city pages2Current CalcuRiver city coverage

This 8 kW snapshot is a comparison scenario, not a quote. It uses CalcuRiver's state planning yield, installed-cost benchmark and EIA 2026-07 residential rate. Actual roof production, export compensation, taxes, financing and local incentives can materially change the result.

state solar model

Build your Montana scenario

Start with state planning benchmarks, then replace them with your actual quote or site-specific inputs.

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The state planning benchmark is not a statewide average and does not replace a roof-specific production model or utility export analysis.

city coverage

Solar cost by city in Montana

Open a city page for a location-specific production benchmark and local planning inputs.

BillingsCity solar estimate →MissoulaCity solar estimate →

How this Montana estimate works

  • Annual production = system size × 1,339 kWh/kW planning benchmark.
  • Retail-value ceiling = annual production × current Montana residential electricity price.
  • The value-capture control lets you haircut that ceiling for self-consumption/export economics.
  • Simple payback = entered net installed cost ÷ modeled annual electricity value.

Source boundaries

1,339 kWh/kW-year planning benchmark for Montana; a planning input, not a statewide average or site-specific roof forecast. Roof orientation, shading, equipment, local weather and utility export compensation can materially change the result.

Production methodologyCost benchmarkDetailed solar calculator
2026 state snapshot

How Montana differs

Residential electricity14.99¢/kWh
8 kW annual production10,712 kWh
8 kW benchmark gross cost$20,160
Simple retail-value payback12.6 years

Montana's July 2026 residential electricity benchmark is 18.1% below the U.S. average. Production and cost are planning benchmarks; utility export rules can change realized savings.

Rate source: EIA Electric Power Monthly Table 5.6.A · 2026-07 preliminary.

methodology & sources

Montana solar methodology

Production basis

1,339 kWh/kW-year planning benchmark for Montana; a planning input, not a statewide average or site-specific roof forecast.

Installed-cost basis

2.52 $/W planning benchmark; this is not an installer quote.

Electricity benchmark

14.99¢/kWh residential state benchmark for 2026-07 (preliminary).

Utility treatment

State pages show a planning-level retail-value benchmark. Utility export compensation can materially change realized savings.

Methodology: Solar utility model · CalcuRiver methodology.

why this estimate changes

Why this solar estimate changes

Solar value is driven by local production, installed cost, the retail value of electricity you avoid buying, and the compensation you receive for exported energy. CalcuRiver does not assume export credits equal the retail rate unless that utility program is explicitly verified.

Core logic: self-used solar offsets retail purchases; exported solar is valued only under a verified export-compensation rule.

Methodology & source policy

Continue this cost analysis

Use the same state context to connect solar production with grid prices, storage and EV charging.

Montana electricity ratesSee the grid-price benchmark used to value solar production.Montana home battery economicsEstimate storage value and self-consumption in the same state.EV charging in MontanaSee how the same electricity market affects vehicle charging.