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TRUSTED BY DURHAM, NH HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon28
    Verified generator installs reviews

Verified Reviews for Generator Install pros in Durham, NH

*The Angi rating for Generator Install companies in Durham, NH 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 Durham, NH 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 May 24, 2025

Find Generator install pros in Durham

Avatar for Generator Supercenter of New Hampshire
Generator Supercenter of New Hampshire
5.0(
15
)

Serving Durham, NH and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Everyone should buy a generator from the Generator Supercenter of NH. Everything was seamless, from the sales visit to the installation. Their professional crews exceeded all expectations. I would highly recommend them."
Completed 22kW Generac Standby Home Generator Installation - With GenMon MobileLink installed, our 24/7 monitoring program which includes annual maintenance!
Automatic Transfer Switch Installed - shown on the left with the customers electrical panel on the right.
Additional Photos
Additional Photos
Additional Photos

+5

Response time3 days
Response rate100%
4 neighbors recently requested a quote
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Avatar for Cote Electric, LLC
Cote Electric, LLC
4.9(
46
)

Serving Durham, NH and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1987

Free estimates

Credit card accepted

"Installation of a gas generator as electrical backup for sump pumps as I live in a flood zone,. This electrician found the problem and fixed it. Thoroughly professional."
Standby Generator installed in the back of family's home.
Generator Install
Generator Maintenance
Response time3 days
181 neighbors recently requested a quote
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Avatar for Smith Electrical
Smith Electrical
4.9(
111
)

Serving Durham, NH and surrounding areas

Approved

In business since 2007

Free estimates

Warranties offered

"He quickly diagnosed the issue with the generator, ordered the part and installed it. All is well!"
Ready for backup power
Our Work
Our Work
Our Work
Our Work

+13

Response time2 days
9 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Bob Daniels Electric
Bob Daniels Electric
4.5(
46
)

Serving Durham, NH and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"A very Honest person came to my home he was very pleasant. Came the same day I looked them up on home advisor. Price was excellent I would definitely use them again. Thank you Bob Daniels Electric. I will recommend your company and will call upon you for my three homes."
Untitled Gallery 1
Response time6 hrs
Recommended by97%of homeowners
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Avatar for ARETE ELECTRIC
ARETE ELECTRIC
5.0(
20
)

Serving Durham, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Credit card accepted

"Tommy and his crew did exceptional work. Very clean, very efficient, and perfect install."
Response time2 days
4 neighbors recently requested a quote
Recommended by5%of homeowners
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Avatar for Loyal Lab Electric & Generators
Loyal Lab Electric & Generators
5.0(
5
)

Serving Durham, NH and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Loyal Lab Electric & Generators is a locally owned electrical contractor serving Dover, Portsmouth, Rochester, and the NH Seacoast from our base in Somersworth, NH. Owner and NH Master Electrician Eric Hope has been in the trade since 2008 and founded this company in 2018. \n\nWe are an authorized Generac dealer with certified service technician's on staff, specializing in whole-home generator installation, electrical panel upgrades, EV charger installation, and electrical repairs. We serve residential customers across the NH Seacoast and southern Maine. NH Master Electrician License 13956. \n\nEvery job we complete donates to The Rusty Fund, supporting local dog rescues through our partnership with Pope Memorial Humane Society in Dover.

Past Projects
Past Projects
Past Projects
Past Projects
Past Projects

+13

27 neighbors recently requested a quote
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Avatar for Moses Electric Inc
Moses Electric Inc
5.0(
11
)

Serving Durham, NH and surrounding areas

Approved

In business since 2011

Emergency services offered

Customers say: True professional

"Scott did an excellent job for us. We needed an EV charger installed and a few other things done. He came by, sized up the job and gave us an estimate. In a few days he showed up ready work. He installed the EV charger, re[laced 4 thrmostats, and fixed a doorbell. All went well. His price was reasonable. He worked quickly and efficiently and got everytjing right the first time. I highly recommenr Moses Electric and would glady hire Scott for future electrical jobs."
Additional Photos
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Additional Photos
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+1

Response time5 hrs
Response rate100%
14 neighbors recently requested a quote
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Generator Install questions, answered by experts

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

The average cost to install a home generator is $5,200, but total costs can range from $500 to $18,000 or more. The final price depends on several factors, including the generator's size, type, brand, fuel source, and the cost of labor and assembly. The generator's size is the most significant cost factor, as units that can power larger homes with higher energy demands cost more.

Cost breakdowns by generator type are typically as follows:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500–$2,000

  • Partial-Home Generators (9kW–20kW): $2,000–$6,500

  • Whole-House Generators (22kW–48kW): $5,000–$18,000

To ensure you get the right size unit for your needs without overpaying, consider hiring an electrician to calculate the electrical load of your essential appliances. It is also recommended to get at least three quotes from qualified installers to find the best fit for your budget.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

Natural gas generators are designed to run for extended periods of time, such as power outages during a natural disaster. Since there’s no limit to the supply of natural gas, they don’t need to stop for refills. However, generators do need maintenance, including pauses to check and add oil. Constantly running them will also cause a lot more wear and tear, leading to a shorter lifespan.

The Durham, NH homeowners’ guide to generator installs

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

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