4.6 
48 *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 June 17, 2026
Serving Potomac, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2007
Free estimates
Emergency services offered
"Outstanding! Super professional. Offered advice on my electrical installation and did the work quickly. I was very pleased with the end installation."
Serving Potomac, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Customers say: Quality work
"We hired Long Electric for the installation of a whole-house generator. I have nothing but good to say about the Long Electric team. Great customer service and very knowledgeable installation team. The installation went flawless and the team cleaned up after the work. I strongly recommend Long Electric!"
Serving Potomac, MD and surrounding areas
Approved
In business since 2009
Customers say: Quick response
"Me and my brother figured out the problem and fixed it ourselves. Which was so wonderful"
Serving Potomac, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"They installed a chandelier. Did a great job, no issues. Very responsive."
+176
Serving Potomac, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2020
Free estimates
Credit card accepted
"Amazing work was quick about it and professional. Definitely recommend. Had an attic fan installed."
Serving Potomac, 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."
+6
Serving Potomac, MD and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Your technician that came out to do a yearly maintenance inspection on my generator was very nice and knowledgeable. He arrived actually earlier than expected and went right to work. I would recommend your company to anyone and it was so nice to deal with someone who acted like they enjoyed their work and wanted to please. Thank you!"
+8
Serving Potomac, MD and surrounding areas
Approved
In business since 2020
Free estimates
Credit card accepted
"Very friendly from the technician to the secretary. They got me in fast worked with my schedule and got out fast. They also mounted my ring doorbell.. Excellent service and the price was awesome"
+2
Serving Potomac, MD and surrounding areas
Approved
In business since 2014
Free estimates
Emergency services offered
"I had John and Aaron come to my home because I was interested in installing a Theater in my new home. They went through the new technologies and options for the Theater and were very knowledgeable. I ended up going with a 4K projector and a Dolby Atmos and absolutely love it and show it off to all my neighbors. Iâ m so glad I took their recommendation on spending the extra money on the projector to get true 4K. I watched the Pitt game this weekend in 4K and it was amazing. I totally recommend this company."
+26
Serving Potomac, MD and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
Horizon Services (MD), LLC, is the regions largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey and Northeastern Maryland. After a quarter of a century in business, Horizon Services (MD), LLC, remains fully committed to setting the industry standard for customer service, installation and focusing on things that are important to busy homeowners.
From average costs to expert advice, get all the answers you need to get your job done.
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