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TRUSTED BY FARMINGTON, NH HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon26
    Verified generator installs reviews

Find Generator install pros in Farmington

Avatar for Robert Electrical Services

Robert Electrical Services

4.99(
151
)
Approved Pro

Robert Electrical Services

4.99(
151
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2003 years of experience

Martin Robert Electric Service is a family owned, full-service, electrical systems installation & repair company. With over 30 years of experience in both the electrical and communications fields, we have the expertise to take on your next new construction, remodeling project, or emergency call. As an authorized Generac generator dealer, consult with us when considering emergency back-up power for your home or business facility. Include us as a member of your team of favored contractors when updating your kitchen, attic, basement level living space. Customer care is of the highest priority. We see satisfied customers as the "engine" driving future success. Maintaining good communications with you is our guarantee. Recent customer submitted reviews can be accessed through the "Testimonials" page at our website. Martin Robert Electric Service looks forward to working with you and promises competitive pricing on your next project. NH Lic. #8409M, Maine Lic. # MS60018611

"Quick response and great communication. Job finished quickly and effectively"

Michael A on November 2025

Martin Robert Electric Service is a family owned, full-service, electrical systems installation & repair company. With over 30 years of experience in both the electrical and communications fields, we have the expertise to take on your next new construction, remodeling project, or emergency call. As an authorized Generac generator dealer, consult with us when considering emergency back-up power for your home or business facility. Include us as a member of your team of favored contractors when updating your kitchen, attic, basement level living space. Customer care is of the highest priority. We see satisfied customers as the "engine" driving future success. Maintaining good communications with you is our guarantee. Recent customer submitted reviews can be accessed through the "Testimonials" page at our website. Martin Robert Electric Service looks forward to working with you and promises competitive pricing on your next project. NH Lic. #8409M, Maine Lic. # MS60018611

"Quick response and great communication. Job finished quickly and effectively"

Michael A on November 2025


Avatar for Cote Electric, LLC

Cote Electric, LLC

4.95(
43
)
Approved Pro

Cote Electric, LLC

4.95(
43
)
Approved Pro
Super Service Award
1987 years of experience
Free onsite estimate

Cote Electric, LLC is a Manchester, New Hampshire-based electrical contractor specializing in residential, commercial, and industrial services. Established in 1987, the company has over 30 years of experience providing integrated electrical solutions throughout Northern New England.

"Emilio was quiet at first but I soon realized he was concentrating on diagnosing issues with my generator. He thoroughly went thru the system and then went about doing the repairs needed all the while being a personable and respectful person. Absolutely would recommend the company again"

Joseph A on October 2025

Cote Electric, LLC is a Manchester, New Hampshire-based electrical contractor specializing in residential, commercial, and industrial services. Established in 1987, the company has over 30 years of experience providing integrated electrical solutions throughout Northern New England.

"Emilio was quiet at first but I soon realized he was concentrating on diagnosing issues with my generator. He thoroughly went thru the system and then went about doing the repairs needed all the while being a personable and respectful person. Absolutely would recommend the company again"

Joseph A on October 2025


Avatar for Heritage Home Service

Heritage Home Service

4.74(
405
)
Approved Pro

Heritage Home Service

4.74(
405
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
1988 years of experience

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Southern Maine. Bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service. Our namesake is about honoring those who came before us, and most importantly, it is about leaving a legacy of serving people extraordinarily well. For over 37 years in business, we have helped countless families across our community stay comfortable and healthy in their homes, and today we continue to evolve and find new ways to serve you even better.

"None"

Olga M on April 2025

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Southern Maine. Bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service. Our namesake is about honoring those who came before us, and most importantly, it is about leaving a legacy of serving people extraordinarily well. For over 37 years in business, we have helped countless families across our community stay comfortable and healthy in their homes, and today we continue to evolve and find new ways to serve you even better.

"None"

Olga M on April 2025


Avatar for W B Lightning Rods

W B Lightning Rods

4.93(
297
)
Approved Pro

W B Lightning Rods

4.93(
297
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
2001 years of experience

WB Lightning Rods is a third-generation lightning protection contractor. Family Owned and operated for over 60 years. installing U.L. Listed Lightning protection systems, All Over the East coast, Midwest south east and south west regions of the U.S. Installations on Residential Homes, Estate Properties, Agricultural and Equestrian Properties. Lightning Protection for trees is also available. No job to big or small References upon Request. Contact us today for a no cost or obligation estimate. We look forward to working with you on your Lightning Protection Project. Thank you. **WE ARE NOT ELECTRICIANS** **WE ONLY INSTALL LIGHTNING PROTECTION SYSTEMS **

"Great company, they were fast, friendly, & accommodating. I would definitely use them again."

Jennifer B on October 2024

WB Lightning Rods is a third-generation lightning protection contractor. Family Owned and operated for over 60 years. installing U.L. Listed Lightning protection systems, All Over the East coast, Midwest south east and south west regions of the U.S. Installations on Residential Homes, Estate Properties, Agricultural and Equestrian Properties. Lightning Protection for trees is also available. No job to big or small References upon Request. Contact us today for a no cost or obligation estimate. We look forward to working with you on your Lightning Protection Project. Thank you. **WE ARE NOT ELECTRICIANS** **WE ONLY INSTALL LIGHTNING PROTECTION SYSTEMS **

"Great company, they were fast, friendly, & accommodating. I would definitely use them again."

Jennifer B on October 2024


"Very responsive and efficient"

Doug T on October 2023

At Jesse Wright Electrical and Solar, our priories are customer service and quality work. We pride ourselves on building lasting relationships with our clients. Call us for an estimate. We look forward to working with you!

"Very responsive and efficient"

Doug T on October 2023


Avatar for Chapman Builders LLC

Chapman Builders LLC

5.00(
21
)
Approved Pro

Chapman Builders LLC

5.00(
21
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
2024 years of experience

Chapman Builders LLC is a responsive, professional, and honest company that specializes in electrical work. Fully licensed and insured in NH. Some of the main installs I do include 200 amp home service upgrades, led lighting installs, and removing old wiring such as knob and tube. Chapman Builders LLC also does other things such as home rot repairs, remodels, flooring, and much more.

"Charles was heartily recommended by my neighbor who, like me, has lots of home remodeling experience. The main task was to replace a whole house generator and, as it turned out, upgrade/rationalize multiple older panels servicing a big home, apt and shop. Charles presented several options with rough estimates, I picked one and he gave a firm estimate with itemized parts list and labor. We picked a date and Charles executed the plan…as planned. A little color. Charles is a big, fit, articulate young man with a strong sense of how a professional ought to comport himself. He started work on the main panel in my garage. Late November in NH. His shoes were sitting by the door and he was working in his socks. I didn’t expect it but what a pleasure to find such a pro. What about $ you ask. I estimate that I saved $10k compared to you know who. "

Jeb H on November 2025

Chapman Builders LLC is a responsive, professional, and honest company that specializes in electrical work. Fully licensed and insured in NH. Some of the main installs I do include 200 amp home service upgrades, led lighting installs, and removing old wiring such as knob and tube. Chapman Builders LLC also does other things such as home rot repairs, remodels, flooring, and much more.

"Charles was heartily recommended by my neighbor who, like me, has lots of home remodeling experience. The main task was to replace a whole house generator and, as it turned out, upgrade/rationalize multiple older panels servicing a big home, apt and shop. Charles presented several options with rough estimates, I picked one and he gave a firm estimate with itemized parts list and labor. We picked a date and Charles executed the plan…as planned. A little color. Charles is a big, fit, articulate young man with a strong sense of how a professional ought to comport himself. He started work on the main panel in my garage. Late November in NH. His shoes were sitting by the door and he was working in his socks. I didn’t expect it but what a pleasure to find such a pro. What about $ you ask. I estimate that I saved $10k compared to you know who. "

Jeb H on November 2025


Avatar for Eastern Electric, LLC

Eastern Electric, LLC

4.96(
24
)
Approved Pro

Eastern Electric, LLC

4.96(
24
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
2018 years of experience

Eastern Electric is an electrical contractor located in Dover, NH. The mission of the company is to deliver the highest quality residential, commercial and industrial electrical services while providing incomparable customer service. Eastern Electric's primary goal is to meet and exceed your expectations in electrical repair, thereby making you another one of our satisfied customers. The company is Veteran owned and operated. Our electrical work is 100% satisfaction guaranteed, we are committed to providing solid expertise, highly skilled workmanship and providing you the best electrical services in NH. We are licensed, and insured in the State of New Hampshire. For years, we have provided top-notch service, satisfying hundreds of customers. Eastern Electric celebrates the kind of excellence exemplified by people like you, our customers!

"Showed up next day, on time. Very pleasant. Diagnosed the problem and completed the fix."

Nancy B on August 2025

Eastern Electric is an electrical contractor located in Dover, NH. The mission of the company is to deliver the highest quality residential, commercial and industrial electrical services while providing incomparable customer service. Eastern Electric's primary goal is to meet and exceed your expectations in electrical repair, thereby making you another one of our satisfied customers. The company is Veteran owned and operated. Our electrical work is 100% satisfaction guaranteed, we are committed to providing solid expertise, highly skilled workmanship and providing you the best electrical services in NH. We are licensed, and insured in the State of New Hampshire. For years, we have provided top-notch service, satisfying hundreds of customers. Eastern Electric celebrates the kind of excellence exemplified by people like you, our customers!

"Showed up next day, on time. Very pleasant. Diagnosed the problem and completed the fix."

Nancy B on August 2025


"They were wonderful, did a great job!"

Judith H on October 2025

Mr. Electric of Southeast NH brings an unmatched commitment to excellence to your electrical project. We deliver unsurpassed professionalism, expertise and value. Call us today.

"They were wonderful, did a great job!"

Judith H on October 2025


Diamond Electrical Contractors, LLC

4.83(
76
)
Approved Pro

Diamond Electrical Contractors, LLC

4.83(
76
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
1994 years of experience

We are not currently offering smaller electrical services, including outlets, fixtures, running wire or panels for things that are not in the home like rvs or boats. We only service electrical panel upgrades within the home and the average cost for this service is around 5000$ but cost will go up or vary according to scope of project. At Diamond Electrical Contractors, LLC our training and experience is second to none. For electrical work you can trust, call the professionals at Diamond Electrical Contractors today!

"If you are looking for the Best of the Best hire Mark!! Professional, Quality and Amazing!! Thank you for adding a Circuit Breaker for my Water Tank!!"

Fay S on November 2025

We are not currently offering smaller electrical services, including outlets, fixtures, running wire or panels for things that are not in the home like rvs or boats. We only service electrical panel upgrades within the home and the average cost for this service is around 5000$ but cost will go up or vary according to scope of project. At Diamond Electrical Contractors, LLC our training and experience is second to none. For electrical work you can trust, call the professionals at Diamond Electrical Contractors today!

"If you are looking for the Best of the Best hire Mark!! Professional, Quality and Amazing!! Thank you for adding a Circuit Breaker for my Water Tank!!"

Fay S on November 2025


Avatar for Generator Supercenter of New Hampshire

Generator Supercenter of New Hampshire

4.93(
30
)
Approved Pro

Generator Supercenter of New Hampshire

4.93(
30
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
2020 years of experience

Generator Supercenter of New Hampshire is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. As a father and son-owned business, we’re committed to the best service. When you call us, our estimates are free, so you can meet with a member of our team to learn about your options with no strings attached!

"I want to thank the staff at the Stratham NH location. As a new customer, we got off to a bad start with a scheduling misunderstanding. After my earlier review, I want to acknowledge that they reached out to me to turn a negative experience into a positive one. It's nice to know that this company cares about their customers. I am very happy with the service they performed on my recent Generac generator. The customer service department and the technician were very professional and courteous. I would recommend this company for your generator needs."

Roger C on August 2024

Generator Supercenter of New Hampshire is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. As a father and son-owned business, we’re committed to the best service. When you call us, our estimates are free, so you can meet with a member of our team to learn about your options with no strings attached!

"I want to thank the staff at the Stratham NH location. As a new customer, we got off to a bad start with a scheduling misunderstanding. After my earlier review, I want to acknowledge that they reached out to me to turn a negative experience into a positive one. It's nice to know that this company cares about their customers. I am very happy with the service they performed on my recent Generac generator. The customer service department and the technician were very professional and courteous. I would recommend this company for your generator needs."

Roger C on August 2024

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Generator Install questions, answered by experts

Whole-house generators can last 20 to 40 years with normal operation and proper maintenance. If you look up the specifications for your generator, you may be able to find a lifespan rated in hours of operation. Life expectancy will vary depending on how often and for how long you use the generator each year. Choosing a fuel with low impact like natural gas or diesel can help generators last as long as possible.

In most cases, there are no tax credits available for home generators. However, that’s a general statement that applies to federal tax credits, so you might have access to state or local tax incentives. You can check the Database of State Incentives for Renewables & Efficiency (DSIRE) for more information about your area. If you hire a reliable home generator installer, they should also know if there are any state or local perks you can use to reduce your installation costs, including tax breaks and rebates.

As long as they have enough fuel, whole-house generators can run for weeks at a time (400 to 500 hours) without suffering too much wear and tear. However, this type of extensive use isn’t ideal if you want to extend the life of your generator.

Two important points. First, some generators may need you to periodically check oil levels every day or so and refill as necessary for safe operation. Second, if your generator uses a fuel tank, keep it regularly full so it doesn’t suddenly shut off. Many backup generators can run through a full tank in a day when they are powering large portions of a home.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

The Farmington, NH homeowners’ guide to generator installs

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