Solar Panel Cost in Montana (2026)
Strong incentives Average installed cost: $2.85/watt · Typical payback: 12-15 years
Montana solar cost breakdown
| Metric | Montana |
|---|---|
| Cost per watt (low–avg–high) | $2.55 – $2.85 – $3.20 |
| 8.6 kW system cost (before incentives) | $21,930 – $27,520 |
| Average residential electricity rate | $0.13/kWh |
| Average peak sun hours/day | 4.7 |
| Typical payback period | 12–15 years |
| Federal tax credit (cash/loan, 2026) | Not available (expired 12/31/2025) |
Montana-specific incentives
Montana offers a state tax credit for residential alternative energy systems (capped near $1,000) alongside net metering. Lower population density can mean fewer local installers, which affects competitive pricing.
Quick facts
Cities in Montana
Frequently asked questions
How much do solar panels cost in Montana?
As of 2026, solar panels in Montana average $2.85 per watt installed, typically ranging $2.55-$3.20/W depending on system size, roof complexity, and equipment tier. A common 8.6 kW residential system runs roughly $21,930-$27,520 before any remaining state incentive.
Is there a state solar tax credit in Montana?
Montana offers a state tax credit for residential alternative energy systems (capped near $1,000) alongside net metering. Lower population density can mean fewer local installers, which affects competitive pricing.
What's the typical payback period for solar in Montana?
Most Montana homeowners see a payback period of 12-15 years based on current electricity rates and remaining incentives, since the federal 30% tax credit no longer applies to cash or loan purchases in 2026.
Does the federal solar tax credit still apply here?
No — the 30% federal Residential Clean Energy Credit (Section 25D) expired for cash and loan purchases on December 31, 2025. It only remains available indirectly through solar leases and PPAs, where the financing company claims a separate commercial credit.
Not financial, tax, or legal advice. Figures on this page are 2026 estimates based on industry aggregator data (EnergySage marketplace medians, SEIA/Wood Mackenzie market insight, and regional installer data) and are provided for general informational and comparison purposes only. Actual pricing, incentive eligibility, and payback periods depend on your specific roof, usage, equipment, and local program rules. Confirm current incentive details at dsireusa.org and consult a licensed tax professional and local installers before making a purchase decision.