Top-rated generator install pros.

Get matched with top generator install pros in Longmont, CO

There are 5 highly-rated local generator install pros.

Verified Reviews for Generator Install pros in Longmont, CO

*The Angi rating for Generator Install companies in Longmont, CO 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 Longmont, CO 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 Longmont

Avatar for Professional Power, Inc.

Professional Power, Inc.

1341 W 121st Avenue
4.86(
7
)
•Approved Pro

Professional Power, Inc.

1341 W 121st Avenue
4.86(
7
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
144 local quotes requested

Professional Power is a locally-owned and operated electrical contractor with offices in Westminster, Colorado. We service all of the greater Denver metro area! Our mission is to provide superior electrical services with a commitment to quality, value, and client satisfaction. Call us today and visit our website at www.propowercolorado.com

"Perfectly. Could not be happier."

Tania D on December 2024

Professional Power is a locally-owned and operated electrical contractor with offices in Westminster, Colorado. We service all of the greater Denver metro area! Our mission is to provide superior electrical services with a commitment to quality, value, and client satisfaction. Call us today and visit our website at www.propowercolorado.com

"Perfectly. Could not be happier."

Tania D on December 2024

Avatar for Heart Heating, Cooling, Plumbing & Electric

Heart Heating, Cooling, Plumbing & Electric

646 Bryant St
4.77(
77
)
•Approved Pro

Heart Heating, Cooling, Plumbing & Electric

646 Bryant St
4.77(
77
)
•Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
395 local quotes requested

Heart Heating, Cooling, Plumbing & Electric provides the highest quality service for all your Furnaces, Air Conditioner, Boilers, Water Heaters, plumbing, and electrical systems. We utilize the latest technology to save our customers time and money, including tablet-based systems with "Uber Style" tracking of your technician and "Up Front" pricing so there are never any surprises. Our staff is licensed, insured, background checked, drug tested, and in a company uniform and vehicle for your safety and peace of mind. We are a veteran-owned company.

"Seneca Trujillo came out to give us a price quote on electrical work in our garage for an EV. He was professional, honest, straightforward and explained everything clearly. He took the time to answer all of my questions and concerns and gave a fair and transparent estimate without upselling unnecessary work. It's refreshing to meet someone who is trustworthy and puts integrity first. He definitely deserves a raise for the way he represents Heart Heating, Cooling, Plumbing and Electric."

Joe V on July 2025

Heart Heating, Cooling, Plumbing & Electric provides the highest quality service for all your Furnaces, Air Conditioner, Boilers, Water Heaters, plumbing, and electrical systems. We utilize the latest technology to save our customers time and money, including tablet-based systems with "Uber Style" tracking of your technician and "Up Front" pricing so there are never any surprises. Our staff is licensed, insured, background checked, drug tested, and in a company uniform and vehicle for your safety and peace of mind. We are a veteran-owned company.

"Seneca Trujillo came out to give us a price quote on electrical work in our garage for an EV. He was professional, honest, straightforward and explained everything clearly. He took the time to answer all of my questions and concerns and gave a fair and transparent estimate without upselling unnecessary work. It's refreshing to meet someone who is trustworthy and puts integrity first. He definitely deserves a raise for the way he represents Heart Heating, Cooling, Plumbing and Electric."

Joe V on July 2025

Avatar for MightyBee Electric, LLC

MightyBee Electric, LLC

7570 Lafayette St
4.53(
282
)
•Approved Pro

MightyBee Electric, LLC

7570 Lafayette St
4.53(
282
)
•Approved Pro
Customers say: Super punctual
73 local quotes requested
27 years of experience

MightyBee Electric is a family owned, GREEN local company with 34 years in the field. We do not charge a trip fee for Angie's List members within the direct Denver metro area ( except Boulder, Longmont, Castle Pines, Castlerock and Parker which will be charged a $39 trip fee) and give free estimates up front of the work always. We never assume authorization and customers can pay by cash, check or credit card at the time of repair. Formerly owned MD ELECTRIC. See website for additional services. 5% military, First Responders and elderly discount

"Excellent job done by Evan and team. He is very honest to provide me a decent quote. I also requested quotes from couple of other businesses, but they gave me about 25% and 135% more whatever Evan gave the quote. Keep it up good work. I am going to hire these people again and again."

Nagaraju A on February 2025

MightyBee Electric is a family owned, GREEN local company with 34 years in the field. We do not charge a trip fee for Angie's List members within the direct Denver metro area ( except Boulder, Longmont, Castle Pines, Castlerock and Parker which will be charged a $39 trip fee) and give free estimates up front of the work always. We never assume authorization and customers can pay by cash, check or credit card at the time of repair. Formerly owned MD ELECTRIC. See website for additional services. 5% military, First Responders and elderly discount

"Excellent job done by Evan and team. He is very honest to provide me a decent quote. I also requested quotes from couple of other businesses, but they gave me about 25% and 135% more whatever Evan gave the quote. Keep it up good work. I am going to hire these people again and again."

Nagaraju A on February 2025

Avatar for Modern Tech

Modern Tech

Colorado Springs
5.00(
12
)
•Approved Pro

Modern Tech

Colorado Springs
5.00(
12
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
65 local quotes requested

We are a dealer and installer of Camera Systems, Alarm Systems, Alarm Monitoring, Access Control, Audio/Visual, and so much more.

"Made the project at 1am and by 10am the next morning it was totally taken care of. Fast, professional, knowledgeable, and fairly priced."

Michelle L on November 2024

We are a dealer and installer of Camera Systems, Alarm Systems, Alarm Monitoring, Access Control, Audio/Visual, and so much more.

"Made the project at 1am and by 10am the next morning it was totally taken care of. Fast, professional, knowledgeable, and fairly priced."

Michelle L on November 2024

Avatar for Diagnostic Guys

Diagnostic Guys

1760 Laporte Ave Unit 3
5.00(
10
)
•Approved Pro

Diagnostic Guys

1760 Laporte Ave Unit 3
5.00(
10
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
48 local quotes requested

We are a quality service company that specializes in finding electrical solutions that fit your house or business. We give an up front price and provide great information so you can make the best decision for your busses and family. With Diagnostic Guys you will get honest and professional work!

"The Diagnostic Guys are our go to for anything electrical. They have done great work updating our light fixtures, adding new lighting (indoor and outdoor) and adding outlets. They are always courteous, prompt and meticulous about the details. Couldn’t be happier with the services they’ve provided for us!"

Kaitlin G on January 2024

We are a quality service company that specializes in finding electrical solutions that fit your house or business. We give an up front price and provide great information so you can make the best decision for your busses and family. With Diagnostic Guys you will get honest and professional work!

"The Diagnostic Guys are our go to for anything electrical. They have done great work updating our light fixtures, adding new lighting (indoor and outdoor) and adding outlets. They are always courteous, prompt and meticulous about the details. Couldn’t be happier with the services they’ve provided for us!"

Kaitlin G on January 2024

Avatar for Sparky's Electrical Services, LLC

Sparky's Electrical Services, LLC

1609 39th Street Ct
5.00(
6
)
•Approved Pro

Sparky's Electrical Services, LLC

1609 39th Street Ct
5.00(
6
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
42 local quotes requested

Electrical Contractor. Providing Electrical Services for residential, commercial, new construction, remodeling and repairs.

"Let me just say that the next time I have an electrical related issue that requires some attention it will be Sparky's that I call. Every box that needs checked to leave me satisfied about the service was checked plus those extra boxes that go beyond just satisfaction that give that confidence and peace of mind I need, everyone needs... to feel we've 'made the right decision in who we hire. Thanks Sparky's & Hector! No stone was left unturned and no box was left unchecked! ;)"

William M on July 2024

Electrical Contractor. Providing Electrical Services for residential, commercial, new construction, remodeling and repairs.

"Let me just say that the next time I have an electrical related issue that requires some attention it will be Sparky's that I call. Every box that needs checked to leave me satisfied about the service was checked plus those extra boxes that go beyond just satisfaction that give that confidence and peace of mind I need, everyone needs... to feel we've 'made the right decision in who we hire. Thanks Sparky's & Hector! No stone was left unturned and no box was left unchecked! ;)"

William M on July 2024

Avatar for Mighty Plumbing Heating Air Electric, LLC

Mighty Plumbing Heating Air Electric, LLC

4730 Paris Street, Unit 100
4.25(
4
)
•Approved Pro

Mighty Plumbing Heating Air Electric, LLC

4730 Paris Street, Unit 100
4.25(
4
)
•Approved Pro
Customers say: Quick response
23 local quotes requested
1 years of experience

Mighty Plumbing and Heating LLC 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.

"After two hours, mighty plumbing could not diagnose and repair my hot water boiler heating system. After two hours I was told their labor charge was $450 per hour. Mighty plumbing was paid $600 at their request and was asked to stop their efforts and leave because it was clear that they did have the ability to repair my system. They requested payment for accomplishing nothing. I would not recommend Mighty Plumbing for diagnosis or repair of a hot water heating system."

Marvin N on January 2025

Mighty Plumbing and Heating LLC 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.

"After two hours, mighty plumbing could not diagnose and repair my hot water boiler heating system. After two hours I was told their labor charge was $450 per hour. Mighty plumbing was paid $600 at their request and was asked to stop their efforts and leave because it was clear that they did have the ability to repair my system. They requested payment for accomplishing nothing. I would not recommend Mighty Plumbing for diagnosis or repair of a hot water heating system."

Marvin N on January 2025

Avatar for Precision Service Electric, Inc.

Precision Service Electric, Inc.

PO Box 1866
5.00(
10
)
•Approved Pro

Precision Service Electric, Inc.

PO Box 1866
5.00(
10
)
•Approved Pro
Customers say: Quick response
77 local quotes requested
31 years of experience

At Precision Service Electric, Inc. we pride our ourselves in quality, value, and service! We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business! When you contact us, you'll be given the exceptional customer service you deserve, including free quotes, up-front pricing, and no hidden fees. These benefits are provided to our clients in order to show that our company genuinely cares about customer satisfaction. Give us a call today to schedule your free estimate!

"On time, did a good job. quick response. "

Robert S on July 2025

At Precision Service Electric, Inc. we pride our ourselves in quality, value, and service! We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business! When you contact us, you'll be given the exceptional customer service you deserve, including free quotes, up-front pricing, and no hidden fees. These benefits are provided to our clients in order to show that our company genuinely cares about customer satisfaction. Give us a call today to schedule your free estimate!

"On time, did a good job. quick response. "

Robert S on July 2025

Colorado Home Solutions

1238 Lincoln Street
New on AngiNew on Angi
•Approved Pro

Colorado Home Solutions

1238 Lincoln Street
New on AngiNew on Angi
•Approved Pro
4 years of experience
Free onsite estimate

Michael 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.

Michael 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.

Avatar for Innovate Electric, Inc.

Innovate Electric, Inc.

3774 Rowe Street Unit 7
5.00(
1
)
•Approved Pro

Innovate Electric, Inc.

3774 Rowe Street Unit 7
5.00(
1
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

Innovate Electric, Inc. 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.

"Extremely professional. Easy to work with. Overall great experience."

Bill M on January 2020

Innovate Electric, Inc. 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.

"Extremely professional. Easy to work with. Overall great experience."

Bill M on January 2020

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Generator Install questions, answered by experts

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 run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

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.

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.

Potential benefits of using a natural gas generator include reducing your carbon footprint, lower likelihood of carbon monoxide exposure, budget-friendly operating costs, and low-maintenance, continuous fuel supply. Some possible drawbacks, though, include higher initial installation costs, dependency on a natural gas supply, and installation complexity. Keep in mind that pros and cons will vary based on the type and brand of natural gas generator. 

The Longmont, CO 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

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