How many days can a standby generator run continuously?

• <div><p>The <a href="https://www.angi.com/articles/how-long-can-whole-house-generator-run-continuously.htm">amount of time a standby generator can run continuously</a> is around <b>3,000 hours</b> on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.</p></div>

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Q: How do I reduce AC startup power for a generator?

• <div><p>To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.</p></div>

Q: Do you have to turn off the main breaker when using a generator?

• <div><p>As a safety measure, you should always turn off the main breaker while operating your generator&rsquo;s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.</p></div>

Q: Do installations include unit assembly?

• <div><p>Many services include assembling the unit and securing it in the window. Confirm with your provider.</p></div>

Q: What are the disadvantages of a standby generator?

• <div><p>While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.</p></div>

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Verified Reviews for Generator Install pros in Gardiner, MT

*The Angi rating for Generator Install companies in Gardiner, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Gardiner, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on March 25, 2025

Reviewed in March 2025
We've been working with Darrell for over a year, and he's done a great job on several big projects for us. He's renovated a kitchen, added a full bathroom with laundry to a dry cabin, built new front and back porches, and is currently constructing a guest cabin from the foundation up. And that’s...
THE FOUR O SIX CONTRACTING LLC
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Reviewed in June 2023
Good service. Prompt and friendly. I would recommend
Spartan Gutter Guards
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Reviewed in August 2022
Landon with Carpet CPR was thorough and knowledgeable in his trade. The carpets he did for me look brand new. He is kind, professional, and takes pride in his work. I will continue to use his services and gladly recommend him to anyone.
Carpet CPR LLC
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Reviewed in March 2021
The experience left me totally satisfied! I was hesitant at first due to the price but I soon found out that the service and product were well worth it! I feel very comfortable using Renewal by Andersen-MT and hope to have more windows replaced in the near future!
Renewal by Andersen of Montana
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Reviewed in May 2020
Trevor took over a job. He installed laminate on bathroom and kitchen cabinets. replaced cabinet doors in both rooms, and re0hung a cabinet. He worked hard, was punctual, thoughtful and communicated really well with us. We highly recommend Trevor!
Hammer Time Home Improvements
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Reviewed in May 2020
Our ducts had never been done. Sam found issues with the ducts as well as animal scat etc. He worked most of the day, and got the job done. He saved my lungs! I highly recommend Sam. He's the best!!
HVAC Power Vac, LLC
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Reviewed in September 2018
They scheduled me promptly and the work was done very professionally. I would hire them again. Very very good work.
Treasure State Electrical Contracting, Inc.
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Reviewed in August 2013
I can only speak to the experience of the actual tree removal, as my landlord made all of the arrangements as well as handling payment so I have no information on those areas. While I did not make the appointment with them, I know they were able to accommodate us very quickly once my landlord...
KARNATZ TREE SVC
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Reviewed in May 2013
My husband called Miller roofing and asked them to come and give us an estimate. Joe Miller call him back right back and set up a day to do the estimate. Joe Miller came that day did the estimate, He told us when he would be able to do the work and he came that day and started and had it done in...
Miller Roofing & Contracting
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Find Generator install pros in Gardiner

A-1 Electrical, LLC

4.3(

)

Generator - Install - For Business

Serving Gardiner, MT and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Just did not get connected as quickly as I did with the choice I made."

Response time1 day

Recommended by90%of homeowners

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Town & Country Electric

4.9(

)

Fixed Generator - InstallFixed Generator - Repair

Serving Gardiner, MT and surrounding areas

In business since 1995

Free estimates

Credit card accepted

With more than 45 years of experience, Town & Country Electric is dedicated to providing our customers with the best quality at a great price. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!\n

29 neighbors recently requested a quote

Recommended by50%of homeowners

Fixed Generator - InstallPortable Generator - Install

Serving Gardiner, MT and surrounding areas

In business since 2024

Free estimates

Warranties offered

"Working with Brandon was amazing, he was incredibly prompt and professional with the small electrical issue I was having. I would highly recommend this company to any homeowner that feels just a little bit out of their depth."

Response time2 hrs

Response rate96%

Recommended by66%of homeowners

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Jacobs Electric, Inc.

New to Angi

Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Gardiner, MT and surrounding areas

In business since 1994

Free estimates

Credit card accepted

For all of your electrical needs, look no further! Give Eric Jacobs a call at Jacobs Electric, Inc., your one stop shop for all of your home and business needs. Customer satisfaction guaranteed! \n

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Big Sky Power and Solar

5.0(

)

Fixed Generator - InstallGenerator - Install - For Business

Serving Gardiner, MT and surrounding areas

In business since 2020

Credit card accepted

Offers commercial services

"They were very professional and reasonable, and they did an excellent job."

Response time2 hrs

Recommended by100%of homeowners

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Generator Install questions, answered by experts

To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

Many services include assembling the unit and securing it in the window. Confirm with your provider.

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

The Gardiner, MT homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

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Jul 10, 2026Jul 10, 2026
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How Much Does a Whole-House Generator Cost? [2026 Data]
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Jul 8, 2026Jul 8, 2026
How Much Does a Natural Gas Generator Cost? [2026 Data]
Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. The average cost for a natural gas generator is $12,000.
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•
May 21, 2026May 21, 2026
How to Hire a Generator Installer
Generators should give you peace of mind, but you’ll only get that if your installer knows what they’re doing. Learn how to hire a pro and what red flags to look for.
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Jul 8, 2026Jul 8, 2026
Whole-House Generator Installation: A Complete Guide
Whole home generator installations require a professional hand. Read this guide to help you decide which generator is best for your home.
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Jul 9, 2026Jul 9, 2026
Who Installs Generators? A Complete Guide
Wondering who to hire to install a generator? Consult this guide to learn who to hire to install a generator or a transfer switch.