Top-rated generator install pros.

Get matched with top generator install pros in Londonderry, VT

Enter your ZIP and get matched with up to 5 pros

Verified Reviews for Generator Install pros in Londonderry, VT

*The Angi rating for Generator Install companies in Londonderry, VT 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 Londonderry, VT 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 October 27, 2025

Find Generator install pros in Londonderry

Vertex Contracting Inc.

Located In:
5.00(
5
)
•Approved Pro

Vertex Contracting Inc.

Located In:
5.00(
5
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
125 local quotes requested

3rd generation electrician. We specialize in re-wiring historical sites, electrical services, repairs, installs, troubleshooting, lighting, panel upgrades, ceiling fans, EV/Electric Charging Stations, and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"They are outstanding!"

Jake V on August 2023

3rd generation electrician. We specialize in re-wiring historical sites, electrical services, repairs, installs, troubleshooting, lighting, panel upgrades, ceiling fans, EV/Electric Charging Stations, and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"They are outstanding!"

Jake V on August 2023

McCormick Electrical, LLC

57 Chestnut Ave
5.00(
4
)
•Approved Pro

McCormick Electrical, LLC

57 Chestnut Ave
5.00(
4
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

Welcome to McCormick Electrical, LLC! In business since 2023, we are a full service electrical company who takes great pride in the quality of our work and guarantees customer satisfaction. We specialize in all maintenance and repair for both residential and commercial properties, and no job is too big or too small. Serving Rutland and its surrounding towns, be sure to give us a all today!

"Colin is an excellent licensed electrician ..He is completing several projects for us and we couldn’t be happier .. As stated in other reviews : prompt - courteous and extremely knowledgeable and very professional."

Mike C on October 2024

Welcome to McCormick Electrical, LLC! In business since 2023, we are a full service electrical company who takes great pride in the quality of our work and guarantees customer satisfaction. We specialize in all maintenance and repair for both residential and commercial properties, and no job is too big or too small. Serving Rutland and its surrounding towns, be sure to give us a all today!

"Colin is an excellent licensed electrician ..He is completing several projects for us and we couldn’t be happier .. As stated in other reviews : prompt - courteous and extremely knowledgeable and very professional."

Mike C on October 2024

My Classic Car Trader LLC

312 Prospect Ave
2.00(
1
)

My Classic Car Trader LLC

312 Prospect Ave
2.00(
1
)
53 years of experience

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Robert Stubbins Electrical and General Contractor

395 US Route 4 E
4.89(
9
)

Robert Stubbins Electrical and General Contractor

395 US Route 4 E
4.89(
9
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

At Rob Stubbins Electrical, searching for energy savings while providing honest customer service goes hand in hand. Whether you're renovating & remodeling, in need of specialty wiring or simply need an evaluation, we strive to provide solutions that are innovative, safe & economical. We treat our customers the way we would like to be treated: fairly, honestly, respectfully, neatly, & in a timely manner. Call 802.775.1484 or email us today. We'll discuss your electrical & contractor needs & build a plan for the future.

"Very pleasant Electricians Sam & Brad did a great job. I now understand how the exterior lights are set up on the property (I recently bought the house) I received a price list via email and chatted with Courtney in the office. Very professional. I would call them again if I have another issue."

Susan M on September 2018

At Rob Stubbins Electrical, searching for energy savings while providing honest customer service goes hand in hand. Whether you're renovating & remodeling, in need of specialty wiring or simply need an evaluation, we strive to provide solutions that are innovative, safe & economical. We treat our customers the way we would like to be treated: fairly, honestly, respectfully, neatly, & in a timely manner. Call 802.775.1484 or email us today. We'll discuss your electrical & contractor needs & build a plan for the future.

"Very pleasant Electricians Sam & Brad did a great job. I now understand how the exterior lights are set up on the property (I recently bought the house) I received a price list via email and chatted with Courtney in the office. Very professional. I would call them again if I have another issue."

Susan M on September 2018

Avatar for Powers Generator Service

Powers Generator Service

5 Business Center Dr
4.25(
12
)

Powers Generator Service

5 Business Center Dr
4.25(
12
)
Customers say: Super punctual
31 years of experience

Additional address - PO Box 10005, Swanzey, NH 03446. Additional contact name - Sheena Royce. Number of Employees: 45. We offer Financing.

Additional address - PO Box 10005, Swanzey, NH 03446. Additional contact name - Sheena Royce. Number of Employees: 45. We offer Financing.

Avatar for Elias Electrical Service

Elias Electrical Service

115 Suzanne Dr
5.00(
5
)

Elias Electrical Service

115 Suzanne Dr
5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are a full service tri state electrical contractor. We are also a 5 star rated servicemagic company. We charge by the hour and have a small service (truck) charge to offset the employee's time to come to you.

We are a full service tri state electrical contractor. We are also a 5 star rated servicemagic company. We charge by the hour and have a small service (truck) charge to offset the employee's time to come to you.

Generator Install questions, answered by experts

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

When installed and used correctly, generators are safe to use. The most critical generator safety tips to keep in mind are:

  • Never use a portable generator inside an enclosed space, as the carbon monoxide exhaust it creates is lethal.

  • Never attempt to connect your generator to your home’s electrical panel independently; hire a professional for this dangerous job.

  • Never overload your generator by connecting more appliances than for which it’s rated; you can damage your generator and appliances or even cause a fire.

When maintained properly, a whole-house generator can last up to 20 years. Costs to maintain and repair generators vary by location and type of generator, but you can expect to pay about $150 to $300 per year for annual generator maintenance checks. An experienced generator service technician will inspect your generator’s engine filter, starting mechanism, fuel, lubrication, and coolant levels to keep your generator in good working condition for as long as possible.

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.

The cost to install a whole-house generator averages at $5,200, but costs can range from $1,500 to $8,900, depending on the type and size of the generator, and the labor required to install it. To find the best deal while still ensuring the unit meets all the needs of your household, hire an electrician to calculate the electrical load of your must-have appliances and electronics beforehand so you don’t pay for more power than you need. As always, be sure to get at least three quotes to find the ideal fit for your needs and budget.

The Londonderry, VT homeowners’ guide to generator installs

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

See all articles

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"