4.5 
50 *The Angi rating for Generator Install companies in Derry, 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 Derry, 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 27, 2026
Serving Derry, NH and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"The installation went flawless. There were 5 installers and everyone one was a professional and had it done in super time. Would recommend them to anyone looking for a generator."
+5
Serving Derry, NH and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1987
Free estimates
Credit card accepted
"Yearly service. I highly recommend Cote Electric for generator install and service!"
Serving Derry, NH and surrounding areas
Approved
In business since 2002
Free estimates
Warranties offered
"Competent, quick, and neat. Explains installation and operation in detail. Returns calls quickly and has better customer service skills than most companies I have dealt with. This job was for wiring a backup generator to house. Will hire again for any electrical work needed."
Serving Derry, NH and surrounding areas
Approved
In business since 2006
Free estimates
Warranties offered
"Professionalâ  -very nice, prompt, and reasonably priced."
Serving Derry, 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 Derry, NH and surrounding areas
Approved
In business since 2003
Free estimates
Credit card accepted
"Jeff and his team did an amazing job for my home renovation. They rewired an entire floor, removing then installing all new outlets, wiring for mini-splits, televisions, fixtures, fire/co2 detectors and a new electrical panel. They installed three wall mounted televisions, numerous lighting and fan fixtures with ease. Josh was a beast, crawling around in the attic and getting our new bathroom vents in and making sure all the switches worked together. They put in some late hours to make sure the job was done right. I would highly recommend Jeff and his team for your electrical needs."
Serving Derry, NH and surrounding areas
Approved
In business since 1990
Free estimates
Customers say: True professional
"I have to say that David Krafton is an excellent electrician. I. Called him about a. light. Over. My sink that I could not fix by replacing the bulbs. He came out and told. Me the light was not working, as it was shorted out. He then went and bought me a new light and installed it. It works get and is so much brighter the the previous one. Thank you David I will be calling you again to do other work for me. Loraine in Bedford N.H."
+5
Serving Derry, NH and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"Very professional. Wouldo hire again"
+1
Serving Derry, NH and surrounding areas
Approved
In business since 2023
Free estimates
Warranties offered
With over 10 years of experience, we pride our company on our quality of work. We are owner operated, and believe in building long-term relationships with our clients by delivering tasks that are accomplished in a neat and workman like manner. Give us a call today. We look forward to working with you!
Serving Derry, NH and surrounding areas
Approved
In business since 2025
Free estimates
Credit card accepted
"Jon as very professional took his time and enolain what was needed to get the job done. If I had to rate himA+ I would want him to work at my house again"
+8
From average costs to expert advice, get all the answers you need to get your job done.
The cost to install a whole-house generator in Boston, MA varies based on factors like generator size, fuel type, and installation complexity. Learn the typical price range and what influences your total cost.
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.
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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.
