Solar panels in Montana

Q: Is solar worth it in Montana?

At 12.1 cents per kWh and 1,459 usable sun hours, a typical system pays back in about 13.4 years.

Q: How much do solar panels cost in Montana?

A 8.8 kW system costs about $25,080 before incentives.

Roofs across Montana get about 1,459 hours of usable sunlight a year, and electricity costs 12.1¢/kWh. That combination puts a typical system's payback at 13.4 years. Here's the detail, from real rooftop data across 2 Montana cities.

1,459Sun hours / yr

12.1¢Per kWh

22Panels typical

13.4 yrPayback

Solar is a slow payback in Montana. At 13.4 years, mostly because electricity here costs 12.1¢/kWh, this only makes sense as a long-horizon decision or with local incentives. Check the numbers hard.

Check your own roof in Montana → These are regional figures; your roof's size, pitch and shading move them a lot.

How Montana compares

Montana gets more sunlight than 36% of the cities we measure, and its electricity costs more than 11% of states and provinces. Both matter, but not equally: the electricity rate usually matters more, because solar saves money by replacing power you would otherwise buy. A sunny state with cheap power often pays back slower than a cloudy state with expensive power. Why that happens →

Solar by city in Montana

City	Sun hrs/yr	Panels	Net cost	Payback
Billings	1,459	22	$17,556	13.4 yrs
Missoula	1,429	23	$18,354	13.9 yrs

What a system costs in Montana

System	Size	kWh/yr	Net cost	Saves/yr	Payback
8 panels	3.2 kW	3,968	$6,384	$480	13.3 yrs
12 panels	4.8 kW	5,953	$9,576	$720	13.3 yrs
16 panels	6.4 kW	7,937	$12,768	$960	13.3 yrs
20 panels	8 kW	9,921	$15,960	$1,200	13.3 yrs
26 panels	10.4 kW	12,898	$20,748	$1,370	15.1 yrs

Payback stops improving as systems grow, then gets worse. You can only save on electricity you were going to buy, so once a system covers your usage the extra panels mostly export at a lower rate.

Montana solar incentives

Every US household can claim the 30% federal residential clean energy credit, which is what the "after credit" figures above assume. On a $25,080 system that is $7,524 back. How the credit works →

State, utility and municipal incentives stack on top and change often — Montana may offer rebates, property or sales tax exemptions, or performance payments. We deliberately don't list specific state programmes here because they change several times a year and stale numbers are worse than none. The DSIRE database is the standard reference and is kept current.

Net metering is the one to actually check. It decides what your utility pays for exported power, and it affects your return far more than most rebates. Rules vary by utility, not just by state, and have been getting less generous. Ask any installer exactly which net metering tariff you would be on.

Montana solar questions

Is solar worth it in Montana?

At 12.1¢/kWh and 1,459 usable sun hours, a typical system pays back in about 13.4 years and returns roughly $15,200 over 25 years. That is slower than average, so compare quotes carefully.

How many solar panels do I need in Montana?

About 22 panels for a home using 10,800 kWh a year. Each 400W panel produces roughly 496 kWh annually at Montana sunlight levels.

How much do solar panels cost in Montana?

A 8.8 kW system runs about $25,080 before incentives and $17,556 after the 30% federal credit. Quotes vary widely by installer and roof complexity — get three.

Worth reading before you buy

What your utility pays for exportsChanges payback more than any equipment choice 12 questions to ask before signingIdentical systems vary 30–40% in price Do panels work in winter?Guide How many panels do I need?Guide

Regional estimates generated 2026-08-22 from Google Solar API rooftop samples across 2 Montana cities, and average Montana electricity rates. Not a quote and not financial or tax advice.