The best solar installers in Montana
A geographically diverse top 5 spanning Bozeman / Gallatin Valley, Missoula, Billings, and Helena — so homeowners across Montana have a local-to-them option in the top picks. Montana is a small residential solar market; for additional in-state and regional alternatives see Honorable mentions below.
Independent Power Systems Local
Why listed: 4.9-star Google rating from 121 reviews on an owner-verified Google business listing, with a working website (checked October 2026).
SBS Solar Local
Why listed: 5-star Google rating from 151 reviews on an owner-verified Google business listing, with a working website (checked October 2026).
Solar Plexus Local
Why listed: 5-star Google rating from 10 reviews on an owner-verified Google business listing, with a working website (checked October 2026).
OnSite Energy Local
Why listed: 4.9-star Google rating from 15 reviews on an owner-verified Google business listing, with a working website (checked October 2026).
Solar Montana Local
Why listed: 4.9-star Google rating from 60 reviews on an owner-verified Google business listing, with a working website (checked October 2026).
National installers National
Sunrun, Tesla Energy, and Palmetto Solar are the major national installers still actively taking new residential contracts as of 2026. Palmetto Solar currently holds EnergySage's Elite+ tier — the platform's highest installer rating. National installers typically have larger sales footprints but also higher financing markup and more variable local service quality than the state-based installers above.
Avoid — recently bankrupt or exited: Sunnova (Chapter 11 June 2025), the original SunPower (Chapter 11 August 2024 — the current "SunPower Inc." is rebranded Complete Solaria, a separate company), ADT Solar (exited residential solar January 2024 — warranty service only), Trinity Solar (East Coast only, doesn't serve most states), and Freedom Forever (Chapter 11 April 2026, converted to Chapter 7 liquidation August 2026). If a salesperson contacts you under any of these brand names, ask which legal entity is actually signing the contract and warranty.
For the complete list of national installers with state coverage maps, financing terms, and ratings:
Honorable mentions
Additional installers worth getting a quote from — other Montana-based options plus regional installers that serve Montana from neighboring states.
Other Montana-based installers
Harvest Solar Montana Local
Why listed: 5-star Google rating from 22 reviews on an owner-verified Google business listing, with a working website (checked October 2026).
YellowBall Roofing & Solar Local
Why listed: 4.9-star Google rating from 309 reviews on an owner-verified Google business listing, with a working website (checked October 2026).
Montana solar economics in 2026
| Metric | Montana average |
|---|---|
| Average residential rate | $0.11–$0.13 / kWh |
| Typical 8 kW system cost (cash) | $22,000–$28,000 before incentives |
| Average $/W | $2.85–3.60 |
| Average annual production (kWh per kW) | ~1,350–1,500 kWh/kW/year |
| Net metering structure | Net metering at retail (NorthWestern Energy, others) |
| Average cash payback | 13–16 years |
For full state-by-state cost comparison see solar cost by state.
Montana solar incentives and rebates (2026)
Montana stacks federal credit pathways (commercial Section 48E for businesses and third-party-owned residential), state-level credits/rebates where applicable, statutory tax exemptions, and utility-specific programs. Below is the 2026 picture with links to authoritative sources.
Federal credits (2026)
- Commercial Section 48E (Clean Electricity Investment Credit): Available to businesses, farms, and to third-party owners in lease/PPA structures (which can pass the benefit through as lower monthly payments). FEOC restrictions apply — see FEOC rules guide and FEOC compliant parts list. IRS — Clean Electricity Investment Credit.
- USDA REAP grants (agricultural / rural small business): Up to 50% of project cost, with low-interest loan guarantees on top. Quarterly application windows. "Before you build" rules — you must apply before construction starts. USDA — REAP Program.
- Federal 30C EV Charger Tax Credit: Up to 30% of eligible EV charging equipment + installation costs at qualifying locations. Expires for property placed in service after June 30, 2026. IRS — 30C Credit.
Montana state-level incentives
- MT Alternative Energy System Credit: Up to $500 against state income tax (legacy program — verify 2026 status).
- Property tax exemption: MT 10-year property tax exemption for renewable systems (capped).
- Sales tax: MT has no state sales tax.
Net metering & utility programs in Montana
NEM at retail rate for NorthWestern Energy customers up to 50 kW residential. See also net metering explained.
- NorthWestern Energy: Retail NEM www.northwesternenergy.com
Montana EV charger and EV-purchase incentives (2026)
- Federal 30C EV Charger Tax Credit: Up to 30% of eligible equipment + installation in qualifying low-income / non-urban census tracts. Expires June 30, 2026 for property placed in service after that date.
- Many Montana utilities and cooperatives offer Level 2 EV charger rebates ($150–$800 typical) often tied to TOU enrollment or smart-charger requirements. Check directly with your specific utility.
Authoritative sources to verify before signing
- MT DEQ — Energy: deq.mt.gov/Energy
- DSIRE (Database of State Incentives for Renewables & Efficiency): programs.dsireusa.org/system/program?state=MT — searchable national database, kept current by NC State.
- Federal IRS guidance: irs.gov — Clean Electricity Investment Credit
What to verify before signing in Montana
- Contractor license: Verify with your state contractor licensing authority before signing.
- NABCEP certification: Most reputable installers carry NABCEP-certified installers on staff. Ask which crew member holds the certification.
- Insurance: General liability + workers comp + roofer's insurance separate from electrical insurance.
- References from your county: Permitting and inspection requirements vary. Ask for 2–3 references from your specific county.
- Get at least three bids: Solar bids vary by 20–35% on the same scope of work. See how to compare solar bids.
Got bids from Montana installers? Compare them properly.
Upload up to four solar proposals from any Montana installer. The analyzer compares $/W, production estimates, equipment, and financing structure — and tells you which one to sign.
Analyze My Bids →Frequently asked questions about Montana solar
Does solar make sense in Montana?
Yes for most homeowners with a $150+ monthly electric bill, an unshaded roof, and 8+ years of expected ownership. Montana's specific economics are summarized in the table above.
How much does a typical Montana solar install cost in 2026?
$22,000–$28,000 for an 8 kW system before incentives. Effective net cost depends on your state and utility incentives.
Should I get more than three bids?
Yes — three is a minimum. Four or five is better. Solar bids vary by 20–35% on the same scope of work. See how to compare solar bids.
Are there other reputable Montana solar installers besides these?
Many. The list above represents installers with strong public profiles in Montana; reputable installers exist beyond it. Get bids from a mix and compare them objectively rather than relying on any one list.