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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

"Cameron was courteous and efficient. He did a great install for us and we would highly recommend him. We will definitely use him for future electrical work."
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

"I hired them to install can lights in my family room. They did an amazing job! Everything I could have asked for, expertise, customer service, and an amazing result!"
Pop up countertop outlets
Pop up countertop outlets
Downtown Restaurant
Downtown Restaurant
New Kitchen Island

+12

Response time1 day
Response rate87%
46 neighbors recently requested a quote
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Avatar for True Bloom Energy Solutions LLC
True Bloom Energy Solutions LLC
5.0(
6
)
Fixed Generator - Install

Serving Johnstown, CO and surrounding areas

Approved

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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.

12 neighbors recently requested a quote
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Avatar for Rapid Energy Solutions, LLC
Rapid Energy Solutions, LLC
4.7(
12
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Johnstown, CO and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"Great company to work with! Detail oriented, punctual, helpful, knowledgeable, friendly and great with communication. As a GC I highly recommend working with this company for any of your electrical needs."
4 neighbors recently requested a quote
Recommended by90%of homeowners
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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

"Really responsive and prompt, especially in the installation phase. We did have a couple of small hiccups, which in my mind a homeowner should expected on literally any remodeling project, and they were resolved quickly. Communication on final details like inspections could have been smoother, but overall the whole process was very clear, well managed, and well executed. Happy with the choice to go with Red Rocks."
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.

5 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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Generator Install questions, answered by experts

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

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. 

While the rating will tell you how many watts the refrigerator needs at the peak of its cycle, it requires additional wattage to start. At the bare minimum, you’ll need a 1,500-watt generator to get the fridge up and running after a blackout. A 2,000-watt generator should be sufficient for most home refrigerators.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

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.

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.

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