4.7 
28 *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
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."
+5
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."
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!"
+13
Serving Durham, NH and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"Installed a thermostat and checked a light fixture for me. Response time was quick, communication and estimate were thorough, work was well done, I will definitely call him again. It was a pleasure doing business with him."
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."
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.
+13
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."
+1
Serving Durham, NH and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"They were wonderful, did a great job!"
+1
Serving Durham, NH and surrounding areas
Approved
In business since 1991
Free estimates
Emergency services offered
"Very professional and did our generator installation very efficiently."
+8
Serving Durham, NH and surrounding areas
Approved
In business since 2019
Emergency services offered
Small jobs welcome
"I will be calling him for all electrical needs from now on."
From average costs to expert advice, get all the answers you need to get your job done.
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
The average cost of a whole-house generator falls between $5,000 and $25,000. Keep reading to learn how much you can expect to spend.
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.
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.
Whole home generator installations require a professional hand. Read this guide to help you decide which generator is best for your home.
Wondering who to hire to install a generator? Consult this guide to learn who to hire to install a generator or a transfer switch.
