Top-rated generator install pros.

Get matched with top generator install pros in Effingham, NH

Enter your zip and get matched with up to 5 pros

Find Generator install pros in Effingham

Avatar for Cote Electric, LLC

Cote Electric, LLC

4.95(
43
)
Approved Pro

Cote Electric, LLC

4.95(
43
)
Approved Pro
Super Service Award
39 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 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
25 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


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
32 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


JLC Electric, LLC

4.69(
67
)
Approved Pro

JLC Electric, LLC

4.69(
67
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
50 years of experience

We at JLC Electric, LLC, focus on quality over quantity. We use our years of experience and expertise to complete your project with perfection. Customer service and honesty are the most important aspects of our business and your satisfaction is guaranteed. Please call us today for an estimate. We look forward to working with you.

"project scheduled to be completed"

Susan B on December 2025

We at JLC Electric, LLC, focus on quality over quantity. We use our years of experience and expertise to complete your project with perfection. Customer service and honesty are the most important aspects of our business and your satisfaction is guaranteed. Please call us today for an estimate. We look forward to working with you.

"project scheduled to be completed"

Susan B on December 2025


Avatar for SUNFLOWER LLC

SUNFLOWER LLC

4.93(
15
)
Approved Pro

SUNFLOWER LLC

4.93(
15
)
Approved Pro
Customers say: Quality work
8 years of experience
Free onsite estimate

SunFlower was founded by Vincenzo and Connor—two energy professionals driven by a shared mission to create a cleaner, more sustainable future. What began as a commitment to reducing carbon footprints has grown into a full-service solar company focused on empowering homeowners and businesses with smart, affordable energy solutions. We deliver high-quality solar installations designed to lower electricity costs, boost energy independence, and make clean energy accessible to all. With expert craftsmanship and personalized service, we help our customers harness the power of the sun for long-term savings and real environmental impact. At SunFlower, we don’t just install solar panels—we help you take control of your energy future.

"Great company"

David C on November 2024

SunFlower was founded by Vincenzo and Connor—two energy professionals driven by a shared mission to create a cleaner, more sustainable future. What began as a commitment to reducing carbon footprints has grown into a full-service solar company focused on empowering homeowners and businesses with smart, affordable energy solutions. We deliver high-quality solar installations designed to lower electricity costs, boost energy independence, and make clean energy accessible to all. With expert craftsmanship and personalized service, we help our customers harness the power of the sun for long-term savings and real environmental impact. At SunFlower, we don’t just install solar panels—we help you take control of your energy future.

"Great company"

David C on November 2024


Avatar for Geek To You Computer Repair and Technology Services

Geek To You Computer Repair and Technology Services

4.71(
19
)
Approved Pro

Geek To You Computer Repair and Technology Services

4.71(
19
)
Approved Pro
Customers say: Quick response
15 years of experience
Free onsite estimate

Geek to You Computer Services was founded 10+ years ago by local technician Rod Ricard. After working out of his house for a few years he decided to do both his wife and himself a favor by opening the first storefront location in Newmarket, NH. Years later we’re still around offering the best computer services in the area. With a focus on customer convenience, customer satisfaction, and trust, Geek to You Computer Services offers a nearly endless list of services for nearly any technological aspect of your life. Whether it’s as simple as a computer virus or speedup, or as complicated as a home theater installation or tricky hardware problem, Geek to You has your back. So stop in! Try something different.

"Excellent explaining the job process and type of camera system to meet my requirements. Excellent with maintaining communications and coordination of installation date."

Tim M on September 2023

Geek to You Computer Services was founded 10+ years ago by local technician Rod Ricard. After working out of his house for a few years he decided to do both his wife and himself a favor by opening the first storefront location in Newmarket, NH. Years later we’re still around offering the best computer services in the area. With a focus on customer convenience, customer satisfaction, and trust, Geek to You Computer Services offers a nearly endless list of services for nearly any technological aspect of your life. Whether it’s as simple as a computer virus or speedup, or as complicated as a home theater installation or tricky hardware problem, Geek to You has your back. So stop in! Try something different.

"Excellent explaining the job process and type of camera system to meet my requirements. Excellent with maintaining communications and coordination of installation date."

Tim M on September 2023


Avatar for LaPlante Electric, Inc.

LaPlante Electric, Inc.

4.89(
60
)
Approved Pro

LaPlante Electric, Inc.

4.89(
60
)
Approved Pro
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
35 years of experience

LaPlante Electric, Inc., is "The Best of Home Advisor 2020" please check out the Reviews by our Super Wonderful Clients!!! Love our clients!!! LaPlante Electric is proud to be a locally owned and family operated business that serves the Maine/New Hampshire communities. Since 1991 we have provided our customers with the highest quality products and expertise at a fair price. Since opening our doors we have built our business on being timely, tidy and making sure that every customer is 100% satisfied when the job is done. We provide our customers with on site assessments and quotes, provide financing and payment options and offer flexible installation scheduling. Our customers know that they can call 24/7 and the phone will be answered by a live person, that they will get a firm price, not an estimate and that we will show up on time when scheduled. Let us show you why our customers become customers for life, get in touch today!

"Fast,friendly,professional"

Mark G on September 2024

LaPlante Electric, Inc., is "The Best of Home Advisor 2020" please check out the Reviews by our Super Wonderful Clients!!! Love our clients!!! LaPlante Electric is proud to be a locally owned and family operated business that serves the Maine/New Hampshire communities. Since 1991 we have provided our customers with the highest quality products and expertise at a fair price. Since opening our doors we have built our business on being timely, tidy and making sure that every customer is 100% satisfied when the job is done. We provide our customers with on site assessments and quotes, provide financing and payment options and offer flexible installation scheduling. Our customers know that they can call 24/7 and the phone will be answered by a live person, that they will get a firm price, not an estimate and that we will show up on time when scheduled. Let us show you why our customers become customers for life, get in touch today!

"Fast,friendly,professional"

Mark G on September 2024


Avatar for Higgz Electric, LLC

Higgz Electric, LLC

5.00(
3
)
Approved Pro

Higgz Electric, LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
5 years of experience
Free onsite estimate

We take great pride our experience, expertise, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Great experience "

Kelly C on October 2025

We take great pride our experience, expertise, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Great experience "

Kelly C on October 2025


Avatar for MW Driscoll Electric, LLC

MW Driscoll Electric, LLC

5.00(
2
)
Approved Pro

MW Driscoll Electric, LLC

5.00(
2
)
Approved Pro
26 years of experience
Free onsite estimate

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades and a variety of other jobs. We're committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Mike was excellent! He put in a ceiling light (where there was no light before), replaced a ceiling light and put in a new outlet. He was efficient, courteous and most importantly did the job well! We will definitely hire him again. "

Ashley C on July 2025

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades and a variety of other jobs. We're committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Mike was excellent! He put in a ceiling light (where there was no light before), replaced a ceiling light and put in a new outlet. He was efficient, courteous and most importantly did the job well! We will definitely hire him again. "

Ashley C on July 2025


Richard Hebert Master Electrician

5.00(
1
)
Approved Pro

Richard Hebert Master Electrician

5.00(
1
)
Approved Pro
6 years of experience

We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring/panel upgrades, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"He not only did a great job, but was a rare contractor who has integrity, means what he says, showed up on time. We were very blessed with his service. "

Kathy R on November 2025

We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring/panel upgrades, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"He not only did a great job, but was a rare contractor who has integrity, means what he says, showed up on time. We were very blessed with his service. "

Kathy R on November 2025

...
Showing 1-10 of 96
Generator Install questions, answered by experts

Generator size requirements vary wildly among properties, but typical generator sizes are listed below based on home square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14kW

  • 2,500 sq ft: 12–16kW

  • 3,000 sq ft: 16–20kW+

Unfortunately, home square footage isn’t always a good indicator of generator size requirements. Instead, you should call in a professional to discuss which items in your home you’d like to run via your generator. They can calculate peak and average consumption for those items and then size your generator appropriately for optimal performance.

No, this is extremely dangerous, often illegal, and you should never attempt it. If you connect your generator to your home without a transfer switch, the generated power can backfeed, essentially flowing back into the utility lines. Backfeeding exposes a significant threat of fatalities or harm to you and utility personnel, in addition to jeopardizing the structural integrity of your home.

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.

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.

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

The Effingham, NH homeowners’ guide to generator installs

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

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"