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Verified Reviews for Generator Install pros in Johnstown, CO

*The Angi rating for Generator Install companies in Johnstown, 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 Johnstown, 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 March 04, 2026

Find Generator install pros in Johnstown

Avatar for Ross Electrical Contracting, LLC
Ross Electrical Contracting, LLC
4.8(
24
)
Portable Generator - Install

Serving Johnstown, CO and surrounding areas

Approved

In business since 2016

Customers say: Quick response

"I own a commercial print company in Denver and I have been using Cameron for a number of years now"
Response time1 day
Recommended by100%of homeowners
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Avatar for Precision Service Electric, Inc.
Precision Service Electric, Inc.
5.0(
10
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+2 more

Serving Johnstown, CO and surrounding areas

Approved

In business since 1994

Warranties offered

Small jobs welcome

"Great quick service at a fair price for lighting and fan installations. Bill, Kyle and Melinda were a friendly and efficient team."
Pop up countertop outlets
Pop up countertop outlets
Downtown Restaurant
Downtown Restaurant
New Kitchen Island

+12

Response time1 day
Response rate90%
57 neighbors recently requested a quote
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Avatar for King Electric LLC
King Electric LLC
4.8(
4
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Johnstown, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Warranties offered

"Fair pricing, Arrived on time, explained all work before starting, cleaned up any residual debris."
Response time1 day
Recommended by100%of homeowners
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Redrocks Roof and Solar LLC
4.1(
9
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Johnstown, CO and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"First-rate service with a personal touch! Itâ s hard to find this kind of care and attention anymore when looking for home repairs. We needed our roof redone and a bunch of electrical repairs. Redrocks Roof and Solar worked with us every step of the way to make sure we were completely satisfied while respecting our budget. They also worked diligently with our insurance company to make sure that nothing was left out of our estimate. Robert and Brooke definitely go the extra mile on everything!"
Response time1 day
Response rate89%
Recommended by75%of homeowners
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Avatar for Bright Spark Electrical Services LLC
Bright Spark Electrical Services LLC
New to Angi
Portable Generator - Repair

Serving Johnstown, CO and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Residential electrician with 7 years of experience handling thousands of projects, including panel upgrades, troubleshooting, and generator installation. Provides full-service residential electrical solutions.

2 neighbors recently requested a quote
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Avatar for Electrical Innovations LLC
Electrical Innovations LLC
New to Angi
Portable Generator - Repair

Serving Johnstown, CO and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Electrical innovations provides electrical safety for families homes, and peoples businesses. We are a fully licensed and insured company who’s been in business since 2010. We are a family owned and operated business who strives for making families happy and satisfied returning customers.

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Avatar for Mighty Plumbing Heating Air Electric, LLC
Mighty Plumbing Heating Air Electric, LLC
2.5(
11
)
Fixed Generator - InstallFixed Generator - Repair

Serving Johnstown, CO and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Friendly, polite and caring . Listens to the customer and provides awesome service. Beautiful work!"
Mighty Van #2
Mighty Vehicles
Mighty Vehicles
Mighty Vehicles
Mighty Vehicles

+8

Response time10 hrs
Response rate90%
10 neighbors recently requested a quote
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Generator Install questions, answered by experts

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

If you’re wondering whether gas generators produce carbon monoxide, know that natural gas generators do not produce carbon monoxide if they are functioning properly, as natural gas burns cleanly. However, if the generator malfunctions and the gas does not burn completely, there is potential for carbon dioxide to be produced. To prevent malfunctions, it's crucial to perform regular maintenance, including running the generator weekly and scheduling professional inspections every 6 to 12 months. Also, be sure to test your carbon monoxide detectors regularly to ensure they function in the rare case of the generator producing carbon monoxide.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

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.

The Johnstown, 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