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  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon17
    Verified generator installs reviews

Find Generator install pros in Goffstown

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 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
38 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
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


J.W. Chick Electric

4.99(
65
)
Approved Pro

J.W. Chick Electric

4.99(
65
)
Approved Pro
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
23 years of experience

J.W. Chick Electric is proud to serve Manchester and the surrounding communities. All jobs are performed to code, and we are licensed and insured, ensuring peace of mind. Call us for all of your electrical needs. We look forward to working with you and guarantee your satisfaction!

"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."

Tracey F on December 2024

J.W. Chick Electric is proud to serve Manchester and the surrounding communities. All jobs are performed to code, and we are licensed and insured, ensuring peace of mind. Call us for all of your electrical needs. We look forward to working with you and guarantee your satisfaction!

"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."

Tracey F on December 2024


"Job was done well and within a day. Also quick response time. I would definitely use again."

Maryellen C on November 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Job was done well and within a day. Also quick response time. I would definitely use again."

Maryellen C on November 2025


Avatar for ARETE ELECTRIC

ARETE ELECTRIC

5.00(
18
)
Approved Pro

ARETE ELECTRIC

5.00(
18
)
Approved Pro
Customers say: Quick response
14 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"⭐️⭐️⭐️⭐️⭐️ Arete 's Electrical Company did an excellent job installing mini-splits in my home! The team was professional, efficient, and took the time to explain everything clearly. The installation was clean, and the system works perfectly. I’m very happy with the results and would highly recommend Arete’s to anyone looking for quality electrical work! "

Kerri P on November 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"⭐️⭐️⭐️⭐️⭐️ Arete 's Electrical Company did an excellent job installing mini-splits in my home! The team was professional, efficient, and took the time to explain everything clearly. The installation was clean, and the system works perfectly. I’m very happy with the results and would highly recommend Arete’s to anyone looking for quality electrical work! "

Kerri P 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
6 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


"Polite.courteous and punctual would recommend to friends"

Mark B on May 2020

Pellerin Electric is a locally owned and operated company serving the New Hampshire area. We pride ourselves on our impeccable work and customer service. Please visit my website.

"Polite.courteous and punctual would recommend to friends"

Mark B on May 2020


Avatar for ALL SOLUTION ELECTRIC LLP

ALL SOLUTION ELECTRIC LLP

5.00(
13
)
Approved Pro

ALL SOLUTION ELECTRIC LLP

5.00(
13
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
2 years of experience

With over 8 years of experience as a Master Electrician, , ALL SOLUTION ELECTRIC LLP is The Solution to all of your electrical needs.. We handle everything from the initial consultation to making sure your property looks perfect every single time. We will always treat your property as we would treat our own, and you will be surprised how simple and easy our team will make the whole process seem. Give our team a call today. We're looking forward to working with you! .

"All Solution Electric came and installed bathroom fans in two of my bathrooms, and were very patient and helpful throughout the process as some hurdles arose in terms of the fans I had bought being faulty (thanks cheap Amazon quality control), waiting while I ran to purchase a new fan that day, installing around the old construction ?character? of the house, and coming back to quickly fix a wiring issue. The price was also totally reasonable and I?d recommend them to anyone needing electrical work done. They?re great guys and I?ll work with them again if the need arises."

Alex B on November 2024

With over 8 years of experience as a Master Electrician, , ALL SOLUTION ELECTRIC LLP is The Solution to all of your electrical needs.. We handle everything from the initial consultation to making sure your property looks perfect every single time. We will always treat your property as we would treat our own, and you will be surprised how simple and easy our team will make the whole process seem. Give our team a call today. We're looking forward to working with you! .

"All Solution Electric came and installed bathroom fans in two of my bathrooms, and were very patient and helpful throughout the process as some hurdles arose in terms of the fans I had bought being faulty (thanks cheap Amazon quality control), waiting while I ran to purchase a new fan that day, installing around the old construction ?character? of the house, and coming back to quickly fix a wiring issue. The price was also totally reasonable and I?d recommend them to anyone needing electrical work done. They?re great guys and I?ll work with them again if the need arises."

Alex B on November 2024


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

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Generator Install questions, answered by experts

When properly maintained, natural gas generators can last a long time, as much as 20 to 40 years. They have relatively few needs compared to generators with other fuel types. However, the generator’s lifespan ultimately depends on how often the generator is used and for how long it’s left running.

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. 

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

No, you shouldn’t use an extension cord to plug a generator directly into your home without using a transfer switch. That’s because systems like pumps and HVAC fans need a steady power source that might not be available directly from your generator alone. If you bypass the circuit breaker box, you risk damaging your electrical system, creating a risk of electrical fire or electrical shock to you or any workers repairing lines on your local electrical grid.

The Goffstown, 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.
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