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TRUSTED BY GAITHERSBURG, MD HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon16
    Verified generator installs reviews

Find Generator install pros in Gaithersburg

Long Electric, LLC
4.9(
167
)

Serving Gaithersburg, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: Quality work

"Entire generator installation was completed in one day. Everyone was constantly working, no slacking. Every question was answered. Site was left in very good condition. Everyone was very pleasant to work with. Melissa, in the office, was a great contact person. I am very pleased with the overall job."
Response time2 days
9 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for GAC Services
GAC Services
4.8(
291
)

Serving Gaithersburg, MD and surrounding areas

Approved (Corporate)

In business since 1970

Free estimates

Warranties offered

"I’m back again to write another stellar review for GAC. Last year they replaced our HVAC system; this year we circled back and had them install a home generator. This was a long and drawn out process due to the various approvals needed from Montgomery County as well as coordination with Washington Gas (which ended up not just being a simple sign off but necessitating an additional, expensive upgrade to the gas line from the street to our home). Nevertheless, GAC did a fantastic job shepherding this process over the 6+ months of waiting on stakeholders, and they were also maximally accommodating to our family’s significant constraints on time and availability (due to health concerns related to a medically fragile family member). A special kudos to Sandy M, GAC’s master electrician, who took it on personally to ensure we were taken care of all throughout this process, going above and beyond with phone calls, text messages, personal visits, etc. on behalf of my family, I want to thank GAC and am giving top marks across the board for this effort which was complex , lengthy, and ultimately successful."
Additional Photos
66 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for OC1 Electric
OC1 Electric
4.6(
51
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2009

Customers say: Quick response

"Oupekkha showed up exactly on time, explained clearly what he was doing, what his annual service contract included and reassured me that our generator is good to go. He even topped off the oil for us. I signed up!"
Response time1 day
1 neighbors recently requested a quote
Recommended by97%of homeowners
Green's Electric
5.0(
16
)

Serving Gaithersburg, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"It went great! Professional, quick to call and discuss the request. What I like the most was their genuine interest in helping me fast. They gave me an estimate the same day and the job was performed in less than 48 hours. I would definitely hire Green Electric for my future requirements. Thanks Mr. Darnell!"
Response time1 day
25 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Rollins Repair
Rollins Repair
4.7(
56
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"He found an electrical problem that Potomac Edison arrived to do a emergency repair. It was a fire hazard. So thankful he found the problem and did an excellent install with our Generator."
 Air Cooled Generator
 30KW Quitesoure
 Residential Installation
 20KW Air Cooled
 Another Residential Installation

+6

Response time9 hrs
1 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Bailey & Shipp Electric
Bailey & Shipp Electric
4.1(
82
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"On both appointments, the technicians (David the first time, Matt & Evan the second time) were respectful and honest, very well organized. And they arrived right on time. We had ceiling fans and recessed lighting installed. They kept the work areas clean. -Frank K., City of Gambrills. My wife and I are very happy with their work, and the jobs were completed in the quoted time, even early! Everything was well explained and questions were answered with the feeling that they weren't in a rush to leave until I was satisfied. We will call again for future jobs."
3 recessed lights
Single Recessed Light
Custom Bathroom Wiring
chandelier
Panel Replacement After

+8

Response time10 hrs
3 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for One Source, LLC
One Source, LLC
4.8(
6
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

One Source Systems is one of the premier custom integrators in the greater Washington D.C. area. We are focused on an elevated client experience and meeting your needs for Smart Home design, including experiential elements such as lighting, shades and incredible dedicated theater and Audio/Video solutions. With over 10 years of experience in the audio industry, we are the experts you need to take care of your home or business. We will treat your home as we would treat our own. Give One Source a call today - we look forward to working with you!

After!
Proper Grounding Showcase
Theater Screen with Starry Night Ceiling
Before!
Lighting Fixtures in a restaurant

+26

Response time2 days
Recommended by80%of homeowners
Avatar for Serene Elec inst & Rep Services LLC
Serene Elec inst & Rep Services LLC
5.0(
5
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

We are committed to excellence in every aspect of our business. \nWe uphold a standard of integrity bound by fairness, honesty and \npersonal responsibility. Our distinction is the quality of service \nwe bring to our customers. Accurate knowledge of our trade combined \nwith ability is what makes us true professionals. Above all, we are \nwatchful of our customers interests, and make their concerns the \nbasis of our business.

Commercial GFCI Repair
Avatar for R&D Home Maintenace and Electrical Services
R&D Home Maintenace and Electrical Services
5.0(
2
)

Serving Gaithersburg, MD and surrounding areas

Approved

In business since 2018

Credit card accepted

Customers say: Quick response

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.

Living room
Interior design
floor job
Bathroom flooring job
Exterior repairs

+127

Response time1 day
11 neighbors recently requested a quote
Recommended by50%of homeowners
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Showing 1-10 of 109
Generator Install questions, answered by experts

For generator installation in MD, keep a gas leak detector, grounding rod, and sound level meter for safety checks. Store extra oil suited for local temperature swings, air filters for pollen, spark plugs, and a fuel stabilizer. Moisture absorbers and anti-corrosion spray help prevent humidity damage, while a heavy-duty tarp protects the unit during storms. These supplies support smooth operation and routine maintenance.

Helpful?

In Gaithersburg, if your generator installation shows signs like persistent starting issues during outages, visible moisture inside the housing, or rust on electrical terminals, it’s time for a professional review. Improper placement near property lines, lack of secure anchoring, or gas line connections that don’t follow local codes are also warning signs. Addressing these quickly helps maintain safe, reliable backup power for your home.

Helpful?

In Gaithersburg, neglecting to clear pollen from air intakes, letting moisture accumulate, or failing to secure outdoor items before storms can all harm your generator installation. Overloading the system during outages, skipping regular test runs, using stale fuel, or blocking ventilation with yard equipment or decorations can also reduce performance. Mindful habits help extend your generator’s life and ensure dependable backup power.

Helpful?

In MD, start spring by clearing pollen and inspecting for winter wear. During summer, check for overheating and ensure vegetation doesn’t block ventilation. In fall, remove leaves, test the transfer switch, and prep for colder months. Winter calls for monitoring ice buildup, battery health, and cold-weather starting. This routine keeps your generator installation ready for MD’s changing weather and ensures reliable backup power.

Helpful?

In Gaithersburg, use tamper-resistant covers and secure all electrical connections to protect children. Install fencing or dense shrubs to create a barrier, and post clear warning signs. For pets, opt for quieter generator models, use motion-activated lights, and keep exhaust areas inaccessible. Well-lit walkways and color-coded controls make operation easier, ensuring the generator area remains safe and accessible for the whole family.

Helpful?

The Gaithersburg, MD homeowners’ guide to generator installs

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