When the power goes out in a Bozeman winter, the furnace blower, well pump and heat tape stop with it. Bozeman Electricians is a free quote service that connects Bozeman, MT homeowners with independent licensed electricians for standby generators, transfer switches and interlocks.
Get a Free Quote Call (406) 643-1006
If the power is out right now, report it to NorthWestern Energy at 888-467-2669 or on its outage map; Park Electric members call 406-222-7778. If only part of the house is dead, see emergency electrician help.
Both work, at very different prices.
A permanent unit on a pad outside, usually fueled by natural gas or propane. An automatic transfer switch senses the outage, starts the generator and moves the load. It needs an electrical permit, often a fuel permit, and set clearances from windows and doors.
You roll the generator out, plug it into an inlet box on the outside wall and switch over the circuits you chose. It costs much less, but you fuel and start it, and it must run outdoors away from windows because of carbon monoxide.
NorthWestern Energy's Montana service guide says standby generators "are to be connected to the customer's wiring system by a permanently installed transfer switch" that is break-before-make and designed "so that connection of the generator to NorthWestern's system is prevented for any mode of operation." It adds that small portable generators "shall not be connected to the customer's wiring system unless a transfer switch is installed properly."
Never plug a generator into a dryer or range outlet with a double-ended cord. That can energize utility lines and hurt line workers. If a contractor proposes an interlock kit, ask how it meets that rule.
List what must run, with starting and running watts.
Automatic transfer switch for standby, or a manual transfer switch or interlock with an inlet for a portable.
Choose a pad location and plan the gas or propane line with a gas contractor.
Set the unit or inlet and wire the switch to the panel.
The contractor pulls the permit, calls for inspection and tests a transfer with you watching.
On September 11, 2024, a storm with strong winds and rain left more than 9,000 NorthWestern customers without power, according to NorthWestern via KBZK. The largest, over 3,200 customers, was near Flanders Mill Road and West Oak Street. In January 2024, during the cold snap that took MSU to -40°F on January 13, NorthWestern reported record electric demand on its Montana system.
Park Electric runs "one-shot" protection settings from early July to early October to reduce wildfire risk, and says this can mean more frequent outages for members. Heat pump backup strips draw a lot, so a generator may cover only part of the heat.
Read more in Bozeman power outages and transfer switch vs interlock vs standby.
Published national cost-guide estimates (2025–2026), not quotes. Quotes come from independent contractors, not this site.
| Job | Typical range | Source |
|---|---|---|
| Generator interlock kit, installed | $400–$850 | HomeGuide |
| Manual transfer switch | $400–$1,300 | HomeGuide |
| Standby generator, installed | about $8,000–$16,000 | manufacturer guidance via retailer |
| Montana state electrical permit (outside Bozeman, Belgrade, Manhattan) | $45 one added circuit · $70 for 2–3 · $120 remodel with panel/service change | Montana DLI form, Rev. 11/25 |
City permit fees are set by the city; ask the contractor or the city building division. Fuel lines, pad work and panel changes add to the total. See the Bozeman electrician cost guide.
Montana requires electricians and electrical contractors to be licensed by the State Electrical Board (MCA Title 37, ch. 68). Look up any contractor or electrician by name or license number in the Montana DLI license lookup, and ask to see the license; electricians must carry it on the job. The board requires contractors to carry workers' comp and unemployment insurance coverage (or an exemption), not a set liability amount, so ask for a certificate of liability insurance too.
Bozeman, Belgrade and Manhattan issue electrical permits inside city limits; everywhere else in the valley, including Livingston, Three Forks, Big Sky and Four Corners, permits come from the Montana Department of Labor & Industry (DLI electrical permits). NorthWestern won't energize new or changed wiring without a permit. Montana adopted the 2023 NEC statewide effective September 26, 2026; certified cities enforce their adopted codes.
Montana's homeowner exemption (MCA 37-68-103(3)) covers work you do yourself on your own home kept for your own use, with a permit and inspection. It does not cover rentals, tenants or work on a grid-tied generator. Leave the meter, mast and utility side to licensed electricians and NorthWestern.
Don't pay the full price before the work is done. If a salesperson signs you up in your home, Montana gives a 3-business-day right to cancel many in-home sales (MCA 30-14-504); ask whether it applies to your contract. For more on vetting, read why a local contractor matters.
A standby unit starts on its own and can carry most of the house, at about $8,000–$16,000 installed. A portable generator with an inlet and a transfer switch or interlock costs far less but needs you to start it, fuel it and pick the circuits. Many households start with the furnace, well pump and fridge.
NorthWestern's service guide requires a permanently installed, break-before-make transfer switch that prevents a generator from connecting to its system in any mode. An interlock is a common lower-cost setup, but ask the contractor in writing how the proposed device meets that rule, and contact NorthWestern if you are unsure.
No. Backfeeding a generator through a household outlet can send power onto utility lines and injure line workers. NorthWestern says not to connect a generator directly to house wiring or a panel. Use a properly installed transfer switch.
It depends on what must run. A gas furnace blower, well pump, refrigerator, heat tape and a few circuits need far less than an all-electric home or a heat pump with backup heat strips. Ask the electrician to list each load and its starting and running watts, then size the generator and switch to that list.
Yes. The transfer switch, inlet and standby wiring need an electrical permit, from the city inside Bozeman, Belgrade or Manhattan limits and from the state elsewhere. A natural gas or propane hookup may need its own permit. Montana's homeowner exemption excludes work on grid-tied generators, so ask which rules fit your setup.
Tell contractors whether you want standby or portable, how you heat the home, whether you have a well pump, and your panel brand if you know it. A photo of the panel and the outside wall near it helps.
Bozeman Electricians is a free quote-referral service, not an electrician or electrical contractor. Independent contractors who serve Bozeman, MT and the Gallatin Valley reply on their own schedules, and the contractor you choose quotes, permits and does the work directly with you. Contractors may pay to receive requests or calls. See how it works.
Describe it once and independent licensed electricians serving Bozeman and the Gallatin Valley can reply with no-obligation quotes.
