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Verified Reviews for Generator Install pros in Jefferson, WV

*The Angi rating for Generator Install companies in Jefferson, WV 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 Jefferson, WV 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 November 11, 2025

Find Generator install pros in Jefferson

Avatar for Montani Mechanical Group Llc
Montani Mechanical Group Llc
4.4(
46
)
Fixed Generator - InstallFixed Generator - Repair

Serving Jefferson, WV and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

Montani Mechanical Group, LLC, is committed to providing the highest quality work at the most cost effective price. We are locally owned and operated, and our fully licensed and insured service technicians, plumbers, and installers are some of the very best in West Virginia. We make customer satisfaction our highest priority. With a combined 40 years of experience in heating, cooling, plumbing, electric, and refrigeration, our company strives to provide both our residential and commercial customers the best experience in what can be very stressful times. \n

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+38

18 neighbors recently requested a quote
Recommended by75%of homeowners
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Avatar for RDP Electrical Services Plus, LLC
RDP Electrical Services Plus, LLC
5.0(
21
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Jefferson, WV and surrounding areas

In business since 2009

Emergency services offered

Credit card accepted

"He installed the generator and serviced it for $5777.00 and everything was great. We then purchased a new home in January 2017 and he was able to move the generator and reinstall it at our new home for $1,016.00. It went perfectly. They were great people doing a great job because they knew what they were doing. The generator still works and we have had no problems. I would recommend him to everyone."
Recommended by100%of homeowners
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Avatar for Flash Electrical
Flash Electrical
4.8(
58
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Jefferson, WV and surrounding areas

In business since 2022

Free estimates

Emergency services offered

"I hired Josh for annual maintenance and inspections for my Generac 10000 kW generator. He was very nice and honest and I'am sure he will do very good work."
Troubleshoot Lighting
Troubleshoot Lighting
Outlet Install and LED bulb swap
Industrial Panel Build
Industrial Panel Build

+7

Response time7 hrs
Response rate93%
Recommended by96%of homeowners
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Avatar for Montani Mechanical Group LLC
Montani Mechanical Group LLC
4.9(
39
)
Fixed Generator - InstallFixed Generator - Repair

Serving Jefferson, WV and surrounding areas

In business since 2016

Free estimates

Emergency services offered

"MMG did a great job all around with my AC repair. I've had them come out twice to work on my aging AC system. Each time they were out quickly, got the job done right, cleaned up after themselves, and were professional. These guys are my go-to for anything HVAC related. I recommend them to everyone."
After
Lowboy Hot Water Tank Installation
Before and After
After
Drain Cleaning

+38

1 neighbors recently requested a quote
Recommended by89%of homeowners
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Avatar for West Virginia Electrical Services LLC
West Virginia Electrical Services LLC
5.0(
2
)
Portable Generator - Install

Serving Jefferson, WV and surrounding areas

In business since 2006

Free estimates

Small jobs welcome

"Very knowledgeable and explained what was required to complete the job, very reasonably priced, and completed the work very timely"
Response time2 hrs
Recommended by100%of homeowners
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Generator Install questions, answered by experts

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

It is safe to run a generator continuously, but you must follow safety protocols to ensure personal and home safety. Read the manufacturer’s instructions for specific recommendations, but the general recommendation is to turn generators off overnight or when you’re away from the house. Overworked generators can pose a fire hazard and if your generator is not in a well-ventilated area, running it continuously could lead to carbon monoxide poisoning.

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. 

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

The Jefferson, WV 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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