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TRUSTED BY POTOMAC, MD HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon48
    Verified generator installs reviews

Verified Reviews for Generator Install pros in Potomac, MD

*The Angi rating for Generator Install companies in Potomac, MD 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 Potomac, MD 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 May 31, 2026

Find Generator install pros in Potomac

Long Electric, LLC
4.9(
167
)

Serving Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: Quality work

"My experience is getting a new whole house generator installed by Long Electric was wonderful. They were responsive, timely and very professional. Everyone I dealt with was very courteous and answered all my questions over and over. I highly recommend their services."
Response time2 days
9 neighbors recently requested a quote
Recommended by91%of homeowners
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Avatar for Nasr Electric Inc
Nasr Electric Inc
4.9(
276
)

Serving Potomac, MD and surrounding areas

Approved

In business since 2003

Free estimates

Warranties offered

"Joseph came to our home on 8 /28/21, to replace an outdoor GFI outlet. He was punctual, professional, and quite easy to work with. While he was there, I asked him to take a look at our very old electrical panel, and would he consider replacing it at a later date. He said, he needed to check his schedule and get back to me. He did. Joseph obtained the permit. We agreed on a date to install the new panel. I am very satisfied with the work performed by Joseph and his assistants. I'm sure it will pass inspection without issue. He's very good at what he does! Yes, I would hire again. Yes, I definitely would recommend."
Additional Photos
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+19

Response time5 days
Response rate100%
1 neighbors recently requested a quote
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Avatar for Greenleaf Electric, LLC
Greenleaf Electric, LLC
5.0(
116
)

Serving Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: True professional

"Greenleaf did an excellent job on our installation. I highly recommend them."
Under Cabinet Lighting
Kitchen
Response time1 day
Response rate88%
9 neighbors recently requested a quote
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Avatar for Vital Electric
Vital Electric
5.0(
42
)

Serving Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"Excellent job . Ludwing arrived on time and worked for 6 hours to complete the installation. He went beyond to solve some part issues . I would highly recommend him ."
Natural history museum
Island light
Island light
Additional Photos
Additional Photos

+8

Response time6 hrs
Response rate95%
Recommended by61%of homeowners
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Avatar for GAC Services
GAC Services
4.8(
291
)

Serving Potomac, MD and surrounding areas

Approved (Corporate)

In business since 1970

Free estimates

Warranties offered

"Could not have asked for better service. The recommended product is working great, the installers were professional and so far the service technicians are top notch."
Additional Photos
66 neighbors recently requested a quote
Recommended by94%of homeowners
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Avatar for Ahmad Electrical Service
Ahmad Electrical Service
4.9(
54
)

Serving Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Emergency services offered

Warranties offered

"I had 5 ceiling fans installed. His installation process was extremely quick and efficient. He also fixed an outlet issue that I had in my living room on the spot. Would definitely use him again for any other future electrical projects."
Electrical Project
Electrical Project
Additional Photos
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Additional Photos

+20

Response time1 day
Response rate97%
15 neighbors recently requested a quote
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Avatar for William G Hyman Electrical Contractor
William G Hyman Electrical Contractor
4.8(
439
)

Serving Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 1980

Free estimates

Warranties offered

"Jeremy and his apprentice Kevin did an outstanding job. They were thorough, professional, polite, and explained the work being done throughout the job. Our house's electrical system was over 60 years old and not up to code or safe. Our fuse box was replaced with a new panel and breakers. The Pepco inspector remarked that Hyman's installation was one of the best installations that he has ever inspected. All of our outlets and switches were updated to meet code. The team found and resolved several problems that were serious safety issues. Our kitchen was upgraded so we could operate appliances without overloading the system. A line was installed to operate our air conditioner condensate pump directly and not from an extension cord. This was an expensive project and I know that I received the best service possible. I am very grateful to William Hyman Electrical for making our home safe."
Additional Photos
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+6

Response time10 hrs
5 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for Elements Of Energy L.L.C.
Elements Of Energy L.L.C.
5.0(
20
)

Serving Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"Elements of energy came to fix and remodel my electrical from my home, which they did a great job, I would definitely hiring them again."
Kitchen and Bathroom
Fixtures & Ceiling Fans
LED Recessed lights
EV Charging Stations
Switches & Receptacles

+176

Response time1 day
Response rate92%
10 neighbors recently requested a quote
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Avatar for D&G Remodeling
D&G Remodeling
5.0(
38
)

Serving Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Warranties offered

"Deybi was super professional and he took the time to explain the electrical system in my old house and recommended the best option. He and his partner also took the time after the work was done to clean up after the work was done and made sure that I was satisfied with the final work. Would definitely hire again!"
Electrical Project
kitchen remodel
VIENNA KITCHEN REMODEL
FORT WASHIMGTON KITCHEN
ALEXANDRIA BATHROOM RENOVATION

+50

Response time10 hrs
Response rate93%
4 neighbors recently requested a quote
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Generator Install questions, answered by experts

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 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.

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.

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. 

It might seem counterintuitive, but installing a generator transfer switch will save you money in the long run. While you’ll have to pay between $400 and $2,500 to have the transfer switch installed, you’ll recoup that amount later on when you don’t have to pay for expensive repairs to your appliances, devices, and electrical system that may have burned out, overloaded, or stopped working due to a sudden loss of power or an incorrect hook up of a generator to your home. 

The Potomac, MD 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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