Montana solar companies
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Freedom Energy
Victor, MT · Bitterroot Valley office · start year not published
EcoGen rating · 55/100- Workmanship
- 25-year performance warranty that it says covers all parts of the system
- Roof penetrations
- Included: its battery page says the 25-year guarantee covers the roof
- Batteries
- Yes, with or without solar; no brand named
- Ways to pay
- Cash, $0-down loans through Clearwater Credit Union, and a power purchase plan (PPA) with no money out of pocket
- Solar since
- Not published; says its team has over 20 years of solar installation experience
License not checked yet: we could not check this company in the Montana license records yet. Ask for its license number and look it up before you sign.
Victor office: 2111 Meridian Rd, Victor, MT 59875 DirectionsPhone: (406) 309-6206Website: gofreedomenergy.com
Visit Freedom Energy websiteHow this rating adds up
- Licensing0/30
- Warranty protection30/35
- Local presence15/15
- Track record0/10
- Options10/10
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Big Dog Solar
Chubbuck, ID · Montana office in Helena · solar since 2008
EcoGen rating · 53/100Google 4.6 ★ (546 reviews)- Workmanship
- 10 years (purchase plan)
- Roof penetrations
- 10 years on roof penetrations (purchase plan)
- Batteries
- aPower2 and Tesla Powerwall 3
- Ways to pay
- Cash purchase and PPA options with $0 down in Montana; its lease-to-own plan is listed for Idaho, Utah and Colorado only; no lender named
- Solar since
- 2008
License checked October 16, 2026: Montana’s registry shows Big Dog Renewable Energy, electrical contractor ELE-UCO-LIC-38723, active to July 15, 2028. Check that this name is on your contract.
Helena office: 7535 Roughsawn Dr, Helena, MT 59602 DirectionsPhone: (406) 849-2611Website: bigdogsolar.com
View Big Dog Solar profileHow this rating adds up
- Licensing0/30
- Warranty protection20/35
- Local presence15/15
- Track record10/10
- Options8/10
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Solar Plexus
Missoula, MT · Montana only · solar since 1994
EcoGen rating · 43/100- Workmanship
- 1 year
- Roof penetrations
- Not published
- Batteries
- Yes, battery-based and off-grid systems; no brand named
- Ways to pay
- Cash, or loans through Clearwater Credit Union or the Montana DEQ loan program
- Solar since
- 1994 (began as a Missoula renewable energy shop)
License not checked yet: we could not check this company in the Montana license records yet. Ask for its license number and look it up before you sign.
Missoula office: 1002 Burlington Ave, Suite 100, Missoula, MT 59801 DirectionsPhone: (406) 721-1130Website: solarplexus1.com
Visit Solar Plexus websiteHow this rating adds up
- Licensing5/30
- Warranty protection5/35
- Local presence15/15
- Track record10/10
- Options8/10
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Big Sky Solar and Electric
Missoula, MT · Missoula office · solar since 2003
EcoGen rating · 30/100- Workmanship
- No term published; says it services its solar systems for the life of the system
- Roof penetrations
- Not published
- Batteries
- Enphase
- Ways to pay
- Not published
- Solar since
- 2003 (founder worked in Montana solar from 1998)
License not checked yet: we could not check this company in the Montana license records yet. Ask for its license number and look it up before you sign.
Missoula office: 1308 River St, Missoula, MT 59801 DirectionsPhone: (406) 830-3071Website: bigskysolar-mt.com
Visit Big Sky Solar and Electric websiteHow this rating adds up
- Licensing0/30
- Warranty protection0/35
- Local presence15/15
- Track record10/10
- Options5/10
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SBS Solar
Missoula, MT · Western Montana · current owners since 2015
EcoGen rating · 30/100- Workmanship
- Not published
- Roof penetrations
- Not published
- Batteries
- Yes, battery backup systems; no brand named
- Ways to pay
- Cash, or loans through the Montana DEQ loan program or Clearwater Credit Union
- Solar since
- Owners Dan and Becky Brandborg have worked in Montana solar since the 1980s (Sunelco); they took over SBS Solar in 2015
License not checked yet: we could not check this company in the Montana license records yet. Ask for its license number and look it up before you sign.
Based in: Missoula, MT DirectionsPhone: (406) 541-8410Website: sbslink.com
Visit SBS Solar websiteHow this rating adds up
- Licensing0/30
- Warranty protection0/35
- Local presence15/15
- Track record7/10
- Options8/10
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OnSite Energy
Bozeman, MT · Missoula office · solar since 2012
EcoGen rating · 27/100- Workmanship
- Not published
- Roof penetrations
- Not published
- Batteries
- Yes, for new and existing solar systems; no battery brand named
- Ways to pay
- “Multiple flexible payment options”; no cash, loan, lease or PPA plan named
- Solar since
- 2012
License checked October 16, 2026: Montana’s registry shows OnSite Energy Inc with construction contractor CCP-CCL-LIC-0207887 and electrical contractor ELE-UCO-LIC-61143, both active. Check that this name is on your contract.
Bozeman headquarters: 1515 N Rouse Ave, Bozeman, MT 59715 DirectionsMissoula office: 1620 Regent St, Suite B & C, Missoula, MT 59801 DirectionsPhone: (406) 551-6135Website: onsiteenergyinc.com
View OnSite Energy profileHow this rating adds up
- Licensing0/30
- Warranty protection0/35
- Local presence15/15
- Track record7/10
- Options5/10
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Wind & Solar World
Upham, ND · no Montana office · solar since 2007
EcoGen rating · 25/100- Workmanship
- Not published
- Roof penetrations
- Not published
- Batteries
- Generac PWRcell
- Ways to pay
- Cash, solar loans (lender for homes not named) and PPAs with no upfront cost
- Solar since
- 2007
License not checked yet: we could not check this company in the Montana license records yet. Ask for its license number and look it up before you sign.
Phone: (701) 526-3385Website: windandsolarworld.com
View Wind & Solar World profileHow this rating adds up
- Licensing0/30
- Warranty protection0/35
- Local presence5/15
- Track record10/10
- Options10/10
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Bozeman Green Build
Bozeman, MT · no street address published
EcoGen rating · 21/100- Workmanship
- 15-year company warranty; its site does not say what it covers
- Roof penetrations
- Not published
- Batteries
- Not published
- Ways to pay
- No home loan, lease or PPA named; it helps farms and businesses use USDA grants
- Solar since
- Not published
License not checked yet: we could not check this company in the Montana license records yet. Ask for its license number and look it up before you sign.
Based in: Bozeman, MT DirectionsPhone: (406) 580-6068Website: bozemangreenbuild.com
Visit Bozeman Green Build websiteHow this rating adds up
- Licensing0/30
- Warranty protection16/35
- Local presence5/15
- Track record0/10
- Options0/10
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repower
Helena, MT · Kalispell office · start year not published
EcoGen rating · 20/100- Workmanship
- Not published
- Roof penetrations
- Not published
- Batteries
- Tesla Powerwall 3
- Ways to pay
- Not published
- Solar since
- Not published
License not checked yet: we could not check this company in the Montana license records yet. Ask for its license number and look it up before you sign.
Helena office: 1325 Hiawatha St, Unit B, Helena, MT 59601 DirectionsPhone: (406) 459-9264Website: repower.co
Visit repower websiteHow this rating adds up
- Licensing0/30
- Warranty protection0/35
- Local presence15/15
- Track record0/10
- Options5/10
Request Montana solar quotes
Ready to compare Montana prices?
Enter your ZIP code to ask solar providers that serve your area for quotes. Compare each quote with the checklist below.
Solar providers that serve your area may contact you, and they pay EcoGen for the introduction. Providers can include installers, solar marketplaces and lead exchanges, and more than one may contact you. How we make money.
Need to know
- We rated 9 Montana solar companies on licensing, warranties, local presence, track record and options. The top three: Freedom Energy (3.5, Good), Big Dog Solar (3.5, Good) and Solar Plexus (3, Average).
- NorthWestern Energy and Montana-Dakota Utilities credit extra solar power kWh for kWh, but once a year unused credits go to the utility unpaid. You pick the reset month; April suits most heating-heavy homes.
- Wiring solar into your home needs a Montana electrical license, and construction contractors must register with the Department of Labor & Industry. Ask for both numbers under the name on your contract.
What solar costs in Montana
Gross cash price before incentives; there is no federal credit for systems you own that are installed after December 31, 2025. Batteries and roof work cost extra. Compare each quote’s price per watt with these numbers.
Source: EcoGen Solar Cost Index, September 2026 Edition, prices as of September 25, 2026. Full breakdown: Montana solar panel prices.
Solar incentives, tax breaks and rebates in Montana
- Net metering
- NorthWestern Energy and Montana-Dakota Utilities credit each extra kWh 1 for 1 on systems up to 50 kW. Once a year, unused credits go to the utility with no payment.
- Reset month
- You pick when your 12-month credit year starts: January 1, April 1, July 1 or October 1. A spring reset usually loses the least.
- Property tax exemption
- Up to $20,000 of a home system's value is not taxed for 10 years. Send Form AB-14 to your Department of Revenue field office by March 1.
- DEQ solar loan
- Up to $40,000 at 3.5% for up to 10 years (4.023% APR with fees). The current window runs October 1 to October 30, 2026; apply before any work starts.
- Federal credit
- The homeowner credit ended for systems installed after December 31, 2025. Montana has no state solar tax credit or rebate, and no general sales tax.
Who qualifies, deadlines and sources: Montana solar incentives.
What to check with your utility
NorthWestern Energy
- Serves about 59% of Montana homes. Extra kWh are credited 1 for 1, and unused credits go to NorthWestern at your Annual Settle-up month.
- You pick that month (January, April, July or October) on Exhibit A of the application, with a $200 fee that is not refunded. You can change it once.
- Do not switch on before the net meter and welcome letter arrive. Credits do not move to a new owner when you sell.
Montana-Dakota Utilities
- Serves about 3.5% of Montana homes. Extra kWh are credited 1 for 1 under the same state law, with a reset date you pick.
- It has its own application; the rate sheet is Rate 92.
Flathead Electric Co-op
- Serves about 11% of Montana homes. As a co-op it is outside the state net metering law.
- Extra power is banked as kWh credits, which expire after 12 months under the co-op’s own policy (read October 18, 2026). Credits do not lower the basic charge or the demand charge. Ask for its written policy and size limit.
Yellowstone Valley Electric Co-op
- Banks extra kWh as credits for up to 12 months; the co-op, not you, sets the reset.
- Net metered accounts pay a demand charge. Ask how much before you size a system.
Other co-ops and Mission Valley Power
- Each sets its own net metering terms.
- Get the export credit, any charges and the size limit in writing before design work starts.
Check the company and its warranty
Three names can appear in one solar deal: the company that sells, the company that signs the contract and the licensed people who do the work. Check that they fit together.
- Contract company: look up its license on the Montana electrical contractor license (State Electrical Board, Department of Labor & Industry) plus construction contractor registration with the Department of Labor & Industry. The name must match your contract.
- Electrical connection: Wiring solar into your home is electrical work: Montana Code 37-68-301 bars anyone from working as an electrical contractor or electrician without a license from the Department of Labor & Industry (https://mca.legmt.gov/bills/mca/title_0370/chapter_0680/part_0030/section_0010/0370-0680-0030-0010.html). Ask who does it.
- Warranty documents: ask for the workmanship warranty, the roof coverage terms and each equipment warranty before you sign.
Before your first sales call, read questions to ask your solar installer and how to read a solar quote.
Compare your Montana quotes
Ask every company to quote the same basics. Then the differences you see are real.
From quote to permission to operate
Some steps overlap, and timing depends on your town, your utility and equipment supply. Ask each installer for a written schedule for your project.
Proposal and site check
The installer looks at your roof, shading and electrical panel and gives you a written proposal.
You and the installerDesign and applications
After you sign, the installer finishes the design and applies to your utility for the connection.
Installer; you sign the formsPermits and utility review
Your town or county reviews the building and electrical permits. The utility reviews the connection.
Permit office and utilityInstallation and inspection
The crew installs the system. A licensed electrician connects it, and the inspector checks the work.
Installer crew, electrician and inspectorPermission to operate
The utility approves the system and updates your meter if needed. Turn the system on only after this step.
Utility
How we rate Montana solar companies
Each company gets up to 100 points from facts anyone can check: its own website and Montana’s public license records, read October 14, 2026. Facts a company does not publish earn no points. We could not check Montana’s license records for these companies when we set the ratings on October 14, 2026, so none of them gets points for a checked state license. A registry read on October 16, 2026 shows active licenses for Big Dog Solar and OnSite Energy; it is shown on their entries and is not yet counted in the points. No company pays for its rating, and we do not use customer star reviews.
- Licensing (30 points): an active state license, a licensed electrician and license numbers printed on its website.
- Warranty protection (35 points): workmanship warranty length, roof-penetration coverage in writing and any production guarantee.
- Local presence (15 points): an office in Montana and Montana named as a service area.
- Track record (10 points): years installing solar.
- Options (10 points): batteries and the number of ways to pay.
Stars: 85 points or more is 5 (Top-rated), 72 is 4.5 (Excellent), 60 is 4 (Very good), 45 is 3.5 (Good), below 45 is 3 (Average). We did not inspect installations, collect customer quotes or test customer service.
Montana solar company FAQs
How do I check a Montana solar installer?
Ask for the company’s Montana electrical contractor license number and its construction contractor registration number, then look both up with the Department of Labor & Industry under the exact name on your contract. Then read the written workmanship warranty, and ask who closes the permit and files the utility paperwork.
Does Montana have net metering?
Yes, for customers of NorthWestern Energy and Montana-Dakota Utilities with systems up to 50 kW. Each extra kWh your panels send out cancels one kWh you buy later. Electric co-ops such as Flathead Electric are outside the state law and set their own terms, so ask yours in writing.
When do Montana solar credits reset?
Once a year. Your 12-month credit year starts on January 1, April 1, July 1 or October 1, whichever you choose on the utility form. Credits left at the end go to the utility with no payment. A spring reset usually loses the least for homes that heat in winter.
Does Montana have a solar tax credit?
No. Montana repealed its credit for home alternative energy systems in 2021, and the federal homeowner credit ended for systems installed after December 31, 2025. What remains is a property tax exemption on up to $20,000 of system value for 10 years, if you file Form AB-14 by March 1.
Will the companies on this page contact me?
Not because they appear here. This page is an editorial comparison. If you request quotes, the providers that serve your area may contact you. They can include installers, marketplaces and lead exchanges. Our page on how we make money explains how EcoGen is paid.
More Montana solar guides
- Montana solar costs
- Montana solar incentives
- Is solar worth it in Montana?
- Montana solar guide
- Free solar panels in Montana
- Questions to ask your solar installer
- How to read a solar quote
- Solar scams and red flags
- Solar financing: cash, loan, lease or PPA
Request Montana solar quotes
When your shortlist is ready, enter your ZIP code to ask providers that serve your area for quotes.
Solar providers that serve your area may contact you, and they pay EcoGen for the introduction. Providers can include installers, solar marketplaces and lead exchanges, and more than one may contact you. How we make money.
