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TRUSTED BY JEFFERSON, MD HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon16
    Verified generator installs reviews

Top-Rated Generator install pros in Jefferson - Updated Nov 2026

Long Electric, LLC
4.9(
173
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Jefferson, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: Quality work

"Long Electric recently completed installation of a whole house generator for our residence. The experience went very smoothly and they showed professionalism in every respect. We were especially impressed by their responsiveness whenever we had any questions about the procedure, as well as the extremely detailed proposal they provided. In the week since the completion of installation, we have already had a 2.5 hour power outage--and the generator worked like a charm. Overall, a great and painless experience. Highly recommend."
Response time2 days
12 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Rollins Repair
Rollins Repair
4.7(
56
)
Fixed Generator - RepairGenerator - Repair - For Business

Serving Jefferson, MD and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"Our existing generator died. James diagnosed the problem and gave us a few options to repair or replace it. We chose to replace it. James handled everything, from getting and installing the new generator to electrical and fuel (propane) connections. We have asked him to schedule us for the annual maintenance on the machine. We are pleased, though we haven't lost power since it was installed, LOL."
 Air Cooled Generator
 30KW Quitesoure
 Residential Installation
 20KW Air Cooled
 Another Residential Installation

+6

Response time9 hrs
3 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Redeemed Electric, Inc. and Construction
Redeemed Electric, Inc. and Construction
4.5(
18
)
Generator - Install - For Business

Serving Jefferson, MD and surrounding areas

Approved

In business since 2011

Free estimates

Credit card accepted

"Edward did an excellent Job in my basement. I got 6 proposals for my basement and he beat all of them. Showed up on time, work was done as scheduled. I will use him on all my future projects and have added his company to my list of vendors at work."
electrical pull box in commercial office
kitchen lighting
fuel tank
Jefferson Basement Remode
Jefferson Basement Remode

+1

Recommended by93%of homeowners
Avatar for Ryan Electric
Ryan Electric
4.6(
10
)
Fixed Generator - Install

Serving Jefferson, MD and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

We are 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.

Project
Project
Project
36 neighbors recently requested a quote
Avatar for Kline Electrical Services
Kline Electrical Services
5.0(
2
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Jefferson, MD and surrounding areas

Approved

In business since 2023

Emergency services offered

Warranties offered

"Simply amazing from start to finish! I can't say enough nice things about this company or the people that I dealt with. They were all professional, friendly and they did great work. They called me just minutes after I clicked their name on Angi's List and had someone out to give me an estimate and had my appointment date set in record time from most companies that I have dealt with for home improvement. I hate having people in my house working but I felt totally comfortable with them. The work they did was exceptional. We got a new power box (breaker box - whatever it's call) and a new meter and a couple of new outlets put in. We also got new smoke detectors throughout the house. They had to work around some issues and relocate a bit of pipe from out water filter system that was in their way. And they just took care of it without any complaints. I didn't have to do anything. They took care of it all and had the inspector come out and get it approved. I feel safe in my home now. I highly recommend this company and I will be calling them for any future electrical work that I need done."
Our technician Mitchell while completing the replacement
Completed panel project
Additional Photos
Baseboard Heater Install Project
The Kline Family Service Club Seal

+3

Response time1 day
Response rate100%
6 neighbors recently requested a quote
Technician Engineers Group
3.7(
15
)
Generator - Install - For Business

Serving Jefferson, MD and surrounding areas

Approved

In business since 1996

Offers commercial services

Customers say: Quick response

"Anthony and his team do expert electrical work of all kinds. We are a 145 year old non-profit organization with buildings and grounds, and have contracted with Technician Engineers Group (TEG) on two large projects (and several small ones) over the last 15 years. One project rewired a large 125 year old building listed on the National Register of Historic Places, and one installed an extensive outdoor lighting system. In these two unusual situations TEG worked closely with us to find innovative solutions to our unique needs. We are very pleased with the results, enjoyed their can-do approach, and highly recommend this company for any electrical challenge. We found TEG reliable, honest, on time, and all the work was completed ahead of schedule."
4 neighbors recently requested a quote
Recommended by53%of homeowners
Avatar for Provident Electric, LLC
Provident Electric, LLC
4.8(
77
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Jefferson, MD and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"Provident and their staff walked us though the evaluation and our design needs during the planning stages for our new home. When the time came for the installation of our generator they worked with us to meet our schedule. Their customer service was excellent. Their entire staff Owner, Installers, Technicians, Office and Customer Service Representatives are true professionals and were a pleasure to work with. If you are going to purchase a standby power system for your home Provident is who you want to use. They are competitively priced with a great team of professionals to make your purchase and installation totally seamless. Top shelf Service !"
swimming pool install
swimming pool install
outdoor lighting
american hospital
american hospital

+46

Response time5 hrs
Recommended by97%of homeowners
Showing 1-10 of 40
Generator Install FAQs, answered by experts

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.

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home’s needs. Accurate output estimates require a professional wind assessment and a review of your household’s energy usage patterns.

Setting up utilities on a vacant property usually takes at least a few months, or between 6 weeks to 16 weeks. This process requires working with the local planning and zoning department, hiring a building contractor or engineer to design the utility layout, securing permits, laying the lines, and connecting the utilities.

The average cost to install a home generator is $5,200, but total costs can range from $500 to $18,000 or more. The final price depends on several factors, including the generator's size, type, brand, fuel source, and the cost of labor and assembly. The generator's size is the most significant cost factor, as units that can power larger homes with higher energy demands cost more.

Cost breakdowns by generator type are typically as follows:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500–$2,000

  • Partial-Home Generators (9kW–20kW): $2,000–$6,500

  • Whole-House Generators (22kW–48kW): $5,000–$18,000

To ensure you get the right size unit for your needs without overpaying, consider hiring an electrician to calculate the electrical load of your essential appliances. It is also recommended to get at least three quotes from qualified installers to find the best fit for your budget.

The Jefferson, MD homeowners’ guide to generator installs

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