Top-rated generator install pros.

Get matched with top generator install pros in Marlborough, MA

There are 10 highly-rated local generator install pros.

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    Average homeowner rating
  • Verified reviews icon19
    Verified generator installs reviews

Find Generator install pros in Marlborough

Avatar for Nicholson Plumbing Heating & Air Conditioning Inc

Nicholson Plumbing Heating & Air Conditioning Inc

4.54(
560
)
Approved Pro

Nicholson Plumbing Heating & Air Conditioning Inc

4.54(
560
)
Approved Pro
Customers say: Super punctual
57 local quotes requested
25 years of experience

Nicholson Plumbing, Heating & Air Conditioning is the company of choice for all your plumbing, heating and air conditioning repair and replacement needs. Our commitment is to you, our customer, and to provide you with outstanding plumbing and HVAC service. You can rest assured with our 100% satisfaction guarantee, 24-hour emergency service, solid warranty and highly trained technicians. Serving the Metro West, MA's service and installation needs. Fully Licensed in MA Plumbing and Gas Fitting. Lic# 30207. Universal EPA Certified & 410A Certified. Fully Insured. Nicholson Plumbing, Heating & Air Conditioning offers a 5% senior discount on service repairs.

"Went very well and got more information than with other companies."

Susan H on April 2025

Nicholson Plumbing, Heating & Air Conditioning is the company of choice for all your plumbing, heating and air conditioning repair and replacement needs. Our commitment is to you, our customer, and to provide you with outstanding plumbing and HVAC service. You can rest assured with our 100% satisfaction guarantee, 24-hour emergency service, solid warranty and highly trained technicians. Serving the Metro West, MA's service and installation needs. Fully Licensed in MA Plumbing and Gas Fitting. Lic# 30207. Universal EPA Certified & 410A Certified. Fully Insured. Nicholson Plumbing, Heating & Air Conditioning offers a 5% senior discount on service repairs.

"Went very well and got more information than with other companies."

Susan H on April 2025


Avatar for Cotti-Johnson Heating-Cooling-Electrical

Cotti-Johnson Heating-Cooling-Electrical

4.68(
155
)
Approved Pro

Cotti-Johnson Heating-Cooling-Electrical

4.68(
155
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
971 local quotes requested

Experiencing issues with your heating, air conditioning, plumbing, or electrical systems? Cotti-Johnson is your reliable one-stop shop for all home comfort needs. From simple fixes to large-scale projects, our professional team handles everything with honesty and expertise. We offer 24/7 emergency services and specialized design services for landscape and indoor lighting. Trust us for top-notch, efficient, and transparent service. Visit our website at callcotti.com or call us at (833) 826-8844 to see how we can improve your home's comfort and efficiency.

"Happy with the work, and the customer service. Will definitely call on them for future work."

Fran P on June 2025

Experiencing issues with your heating, air conditioning, plumbing, or electrical systems? Cotti-Johnson is your reliable one-stop shop for all home comfort needs. From simple fixes to large-scale projects, our professional team handles everything with honesty and expertise. We offer 24/7 emergency services and specialized design services for landscape and indoor lighting. Trust us for top-notch, efficient, and transparent service. Visit our website at callcotti.com or call us at (833) 826-8844 to see how we can improve your home's comfort and efficiency.

"Happy with the work, and the customer service. Will definitely call on them for future work."

Fran P on June 2025


Avatar for NETR Inc

NETR Inc

4.79(
76
)
Approved Pro

NETR Inc

4.79(
76
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
240 local quotes requested

For emergency services, please call 781-933-6387. N.E.T.R., Inc. is here to help homeowners install the best heating and cooling systems that fits their needs. Since 1989, we’ve installed heating and cooling systems in Boston and its surrounding areas, tackling tough problems that our clients face. Our goal is to ensure our clients have energy efficient, quiet, reliable systems so they can live their lives to the fullest both at home and at work. Our dedication to our customers’ needs is what drives us each and every day. Our approach to temperature control and comfort has helped us become one of the most respected names in heating, cooling, and refrigeration in New England

"Before installing a mini-split, the sales person told me that I'd need to cut down an interior shelf to a specific height. I paid a handyman $400 to do exactly what the sales person instructed. Later on, N.E.T.R. came and did the installation; however, AFTER the installation, a technician told me that they hadn't accounted for the vent opening and closing and that the shelf would need to be further cut down. As you can imagine, this type of service is rather ridiculous. If they knew that the shelf would need further cutting, they should have NOT installed the unit. I have called N.E.T.R. six (6) times in three weeks, and no one has called me back about this issue. After paying for the unit and for a handyman, it's ridiculous that I have AC that is compromised because no one with the company thought to properly measure the space so that the work by the handyman could be done once. At this point, I'd like for N.E.T.R. to take care of this for me."

Linda O on June 2025

For emergency services, please call 781-933-6387. N.E.T.R., Inc. is here to help homeowners install the best heating and cooling systems that fits their needs. Since 1989, we’ve installed heating and cooling systems in Boston and its surrounding areas, tackling tough problems that our clients face. Our goal is to ensure our clients have energy efficient, quiet, reliable systems so they can live their lives to the fullest both at home and at work. Our dedication to our customers’ needs is what drives us each and every day. Our approach to temperature control and comfort has helped us become one of the most respected names in heating, cooling, and refrigeration in New England

"Before installing a mini-split, the sales person told me that I'd need to cut down an interior shelf to a specific height. I paid a handyman $400 to do exactly what the sales person instructed. Later on, N.E.T.R. came and did the installation; however, AFTER the installation, a technician told me that they hadn't accounted for the vent opening and closing and that the shelf would need to be further cut down. As you can imagine, this type of service is rather ridiculous. If they knew that the shelf would need further cutting, they should have NOT installed the unit. I have called N.E.T.R. six (6) times in three weeks, and no one has called me back about this issue. After paying for the unit and for a handyman, it's ridiculous that I have AC that is compromised because no one with the company thought to properly measure the space so that the work by the handyman could be done once. At this point, I'd like for N.E.T.R. to take care of this for me."

Linda O on June 2025


Avatar for Amazan Electrical

Amazan Electrical

5.00(
13
)
Approved Pro

Amazan Electrical

5.00(
13
)
Approved Pro
Customers say: True professional
2 years of experience
Emergency services offered

Welcome to Amazan Electrical, proudly servicing from Leominster to Boston and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers we serve. Call us today! You will not be disappointed. As we travel to meet with you and go over your ideal electrical needs, there will be a $100 estimate fee. We look forward to working with you!

"Very professional and friendly personality. Completed the project same day. We were able to use our electricity that night. He even added on a requested project for me. Nice guy. Thank you very much!"

VIRGINIA P on December 2024

Welcome to Amazan Electrical, proudly servicing from Leominster to Boston and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers we serve. Call us today! You will not be disappointed. As we travel to meet with you and go over your ideal electrical needs, there will be a $100 estimate fee. We look forward to working with you!

"Very professional and friendly personality. Completed the project same day. We were able to use our electricity that night. He even added on a requested project for me. Nice guy. Thank you very much!"

VIRGINIA P on December 2024


Avatar for Ryan Silvia

Ryan Silvia

4.43(
7
)
Approved Pro

Ryan Silvia

4.43(
7
)
Approved Pro
Customers say: Quick response
2 years of experience
Free onsite estimate

Here at R.Silvia Electrical Contractor we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Call or text 4012637151

"Ryan was on time, assessed and explained the problem(s), gave estimate, purchased materials, provided receipts and did not inflate his hours worked and provided accurate billing. He did everything that needed to be done today in a straightforward and professional manner. I put his name and number in my contacts for future needs."

Tom C on October 2025

Here at R.Silvia Electrical Contractor we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Call or text 4012637151

"Ryan was on time, assessed and explained the problem(s), gave estimate, purchased materials, provided receipts and did not inflate his hours worked and provided accurate billing. He did everything that needed to be done today in a straightforward and professional manner. I put his name and number in my contacts for future needs."

Tom C on October 2025


"Just had an upgrade from 100 to 200 amp, and also had an additional front outdoor receptacle installed. Angel and his technicians from AMR Electric did an a phenomenal job. They were very professional, informative, courteous and friendly. Angel kept us informed frequently, every step of the way, and his prices are very competitive.They had cleaned up thoroughly after the job was done. These gentlemen really are professionals and they know their stuff. I would highly recommend AMR for all of your electrical needs. Thank you Angel for a job well done. Definitely a 5 Star business."

Jim H on March 2025

Professional electrician with high quality work. FREE ESTIMATES!

"Just had an upgrade from 100 to 200 amp, and also had an additional front outdoor receptacle installed. Angel and his technicians from AMR Electric did an a phenomenal job. They were very professional, informative, courteous and friendly. Angel kept us informed frequently, every step of the way, and his prices are very competitive.They had cleaned up thoroughly after the job was done. These gentlemen really are professionals and they know their stuff. I would highly recommend AMR for all of your electrical needs. Thank you Angel for a job well done. Definitely a 5 Star business."

Jim H on March 2025


Avatar for Moises Sarante

Moises Sarante

5.00(
4
)
Approved Pro

Moises Sarante

5.00(
4
)
Approved Pro
13 years of experience

We pride ourselves on being the best Electrical company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"Excellent service, very professional, responsible and reliable "

Grissel G on January 2025

We pride ourselves on being the best Electrical company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"Excellent service, very professional, responsible and reliable "

Grissel G on January 2025


Avatar for Dave Alcott Electric

Dave Alcott Electric

5.00(
4
)
Approved Pro

Dave Alcott Electric

5.00(
4
)
Approved Pro
Customers say: Quick response
3 years of experience
Free onsite estimate

Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We thrive to take care of all our client's unique needs. We are ethical, honest, and easy to communicate with. Call us today you'll be pleased you did. Thank you Weekends M-F 8-5pm

"Dave did great work. He was always in communication with us and was transparent and honest. Knocked out a service upgrade in a day! Gave an invoice and scope of work when requested and showed up on time ready to go. Both Dave and his apprentice John were respectful and an absolute pleasure to work with on this project."

Joseph T on February 2025

Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We thrive to take care of all our client's unique needs. We are ethical, honest, and easy to communicate with. Call us today you'll be pleased you did. Thank you Weekends M-F 8-5pm

"Dave did great work. He was always in communication with us and was transparent and honest. Knocked out a service upgrade in a day! Gave an invoice and scope of work when requested and showed up on time ready to go. Both Dave and his apprentice John were respectful and an absolute pleasure to work with on this project."

Joseph T on February 2025


Avatar for Motha Electric

Motha Electric

New on AngiNew on Angi
Approved Pro

Motha Electric

New on AngiNew on Angi
Approved Pro
40 years of experience
Free onsite estimate

Motha Electric provides our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

Motha Electric provides our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!


CD Electrical Services, Inc.

5.00(
4
)
Approved Pro

CD Electrical Services, Inc.

5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
24 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Great working with Chip. Transparent pricing and prompt communications. Looking forward to working with him again."

Todd B on May 2021

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Great working with Chip. Transparent pricing and prompt communications. Looking forward to working with him again."

Todd B on May 2021

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Generator Install questions, answered by experts

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

No, you cannot plug a generator directly into a wall outlet in your home. Plugging in a generator without an interlocking kit, extension cord, or wall outlet receptacle is incredibly dangerous and can cause back-feeding—power from the generator back-feeds into utility lines. Also, if the main power comes back on while your generator is on, it could damage the generator and cause a house fire.

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

Yes, installing a generator usually increases your property value because buyers are getting the added peace of mind knowing they’ll be able to maintain power through blackouts. In most cases, you should see close to a 100% return on investment (ROI). Keep in mind that home generators usually need a permanent foundation, and installing a concrete slab will likely raise your property taxes slightly.

In some situations, yes. Never try to put biofuel into any home generator without checking the specifics first. If a generator has the ability to run on diesel, it can also run pure biofuel (the clear kind made from seed oils, for example). But if you are using biofuel made from animal fats or vegetable oils, the generator will need significant modifications before it can handle a sludgier type of biofuel.

The Marlborough, MA homeowners’ guide to generator installs

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

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