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    Verified generator installs reviews

Find Generator install pros in Potomac

Avatar for C H Tel. & TV Co., Inc.

C H Tel. & TV Co., Inc.

4.93(
366
)
Approved Pro

C H Tel. & TV Co., Inc.

4.93(
366
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
45 years of experience

For over 40 years, our goal has been to ensure the complete satisfaction of every customer, while offering knowledgeable and friendly service at affordable rates. Established in 1980, we have gained the experience of being able to provide nearly any type of telephone service, T.V. mounting and attic antenna installation that you require. We are equipped to handle all of your low voltage cabling needs be it voice, data, TV, fiber, or ethernet. Our goal is to stay in touch with any changes in our industry, so that we can always offer you the latest and most current information and services. Our mission is: To serve our customers with the extensive knowledge and expertise we have gained in our industry, while continually offering them the finest in customer service.

"I had a problem with my old landline phone system. First I called Verizon, but their technician could not solve the problem. Then I contacted CH Tel. Charlie called back promptly and sent a technician, Rick, the same day. Rick was very knowledgeable and thorough. He was able to find the problem and install a new line. While he was here he also solved some long-standing problems I had with loose wires and an open phone box. He was also very respectful of my property and did a good job cleaning up after the work. I would highly recommend this company for low-voltage wiring projects."

Christine K on November 2025

For over 40 years, our goal has been to ensure the complete satisfaction of every customer, while offering knowledgeable and friendly service at affordable rates. Established in 1980, we have gained the experience of being able to provide nearly any type of telephone service, T.V. mounting and attic antenna installation that you require. We are equipped to handle all of your low voltage cabling needs be it voice, data, TV, fiber, or ethernet. Our goal is to stay in touch with any changes in our industry, so that we can always offer you the latest and most current information and services. Our mission is: To serve our customers with the extensive knowledge and expertise we have gained in our industry, while continually offering them the finest in customer service.

"I had a problem with my old landline phone system. First I called Verizon, but their technician could not solve the problem. Then I contacted CH Tel. Charlie called back promptly and sent a technician, Rick, the same day. Rick was very knowledgeable and thorough. He was able to find the problem and install a new line. While he was here he also solved some long-standing problems I had with loose wires and an open phone box. He was also very respectful of my property and did a good job cleaning up after the work. I would highly recommend this company for low-voltage wiring projects."

Christine K on November 2025


"I couldn't have asked for a better experience. They were hired to replace the main electrical panel/breakers at my elderly mother's home. Roni, the electrician, was a wonderful communicator, and was very knowledgeable and thorough in completing the job and in putting her at ease. The price was very reasonable. I will be using Nasr Electric in my own home, as well as recommending them to all my friends and family in the DMV area."

Katherine G on August 2025

Family Owned and Operated. Please call us and you'll be able to talk to our master electrician. To fix any electrical issue at your home or business, you will need a trusted good quality electricians

"I couldn't have asked for a better experience. They were hired to replace the main electrical panel/breakers at my elderly mother's home. Roni, the electrician, was a wonderful communicator, and was very knowledgeable and thorough in completing the job and in putting her at ease. The price was very reasonable. I will be using Nasr Electric in my own home, as well as recommending them to all my friends and family in the DMV area."

Katherine G on August 2025


Long Electric, LLC

4.96(
129
)
Approved Pro

Long Electric, LLC

4.96(
129
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
15 years of experience

I am Jason Long, founder and master electrician of Long Electric, LLC. I started my electrical career at age 17, and have moved full force to obtain my Master Electrical License amongst many other specialty licenses in the Frederick, and Montgomery Counties. Long Electric, LLC, is proud to note that they have participated in custom building and remodeling awards from the National Association of the Remodeling Industry and custom builder awards, and continues to work closely with many of the renowned high end general contractors in the area. Long Electric, LLC, prides ourselves on customer satisfaction, shown forth by a majority word of mouth and referral based clientele. Therefore, your electrician will not rest until you do!

"Very professional from beginning to end, I would certainly use Long electric for other projects in the future......"

Francisco R on December 2025

I am Jason Long, founder and master electrician of Long Electric, LLC. I started my electrical career at age 17, and have moved full force to obtain my Master Electrical License amongst many other specialty licenses in the Frederick, and Montgomery Counties. Long Electric, LLC, is proud to note that they have participated in custom building and remodeling awards from the National Association of the Remodeling Industry and custom builder awards, and continues to work closely with many of the renowned high end general contractors in the area. Long Electric, LLC, prides ourselves on customer satisfaction, shown forth by a majority word of mouth and referral based clientele. Therefore, your electrician will not rest until you do!

"Very professional from beginning to end, I would certainly use Long electric for other projects in the future......"

Francisco R on December 2025


Avatar for Absolute Electric LLC

Absolute Electric LLC

4.90(
815
)
Approved Pro

Absolute Electric LLC

4.90(
815
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
19 years of experience

I am passionate about and take pride in my craft. Our philosophy is to treat your home or place of business as if it were our own. If you are not satisfied with our service, please contact me or our Service Manager, Rob, because our goal is your satisfaction. We want you as a customer for life, not just to make a quick buck. Call us today at 571.525.2823, as we look forward to discussing your electrical needs. Regards, Shauwn Collins, Owner

"Excellent and professional service. I would highly recommend Absolute Electric."

Brenda L on October 2025

I am passionate about and take pride in my craft. Our philosophy is to treat your home or place of business as if it were our own. If you are not satisfied with our service, please contact me or our Service Manager, Rob, because our goal is your satisfaction. We want you as a customer for life, not just to make a quick buck. Call us today at 571.525.2823, as we look forward to discussing your electrical needs. Regards, Shauwn Collins, Owner

"Excellent and professional service. I would highly recommend Absolute Electric."

Brenda L on October 2025


Avatar for Greenleaf Electric, LLC

Greenleaf Electric, LLC

4.95(
110
)
Approved Pro

Greenleaf Electric, LLC

4.95(
110
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
15 years of experience

We offer over 20 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation of wiring for additions and remodels. We also specialize in home standby generator installations, panel upgrades, recessed lighting, smart lighting, Voice/Data/Access Control/CCTV, and much much more. We take pride in our quality of work and our commitment to outstanding results. We are committed to providing personalized service for each individual project we take on. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Gill is knowledgeable and professional. Communication was great. There was a small delay due to unfamiliarity with my utility's policy. The inspection initially failed since the cold water ground didn't land at the main breaker, despite having ground rods installed. This was promptly resolved anyway."

Henry C on December 2025

We offer over 20 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation of wiring for additions and remodels. We also specialize in home standby generator installations, panel upgrades, recessed lighting, smart lighting, Voice/Data/Access Control/CCTV, and much much more. We take pride in our quality of work and our commitment to outstanding results. We are committed to providing personalized service for each individual project we take on. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Gill is knowledgeable and professional. Communication was great. There was a small delay due to unfamiliarity with my utility's policy. The inspection initially failed since the cold water ground didn't land at the main breaker, despite having ground rods installed. This was promptly resolved anyway."

Henry C on December 2025


Avatar for Modern Security & Technology Solutions, LLC

Modern Security & Technology Solutions, LLC

4.97(
68
)
Approved Pro

Modern Security & Technology Solutions, LLC

4.97(
68
)
Approved Pro
Customers say: True professional
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
8 years of experience

We invite you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion we work with you until the job is done. We thrive to take care of all of our clients unique needs. We are ethical, honest and easy to communicate with. Call us today you'll be pleased you did. Thank you!

"The team came in and started to work immediately. Very professional. I will use them again for my next project."

Bobby B on June 2024

We invite you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion we work with you until the job is done. We thrive to take care of all of our clients unique needs. We are ethical, honest and easy to communicate with. Call us today you'll be pleased you did. Thank you!

"The team came in and started to work immediately. Very professional. I will use them again for my next project."

Bobby B on June 2024


Avatar for William G Hyman Electrical Contractor

William G Hyman Electrical Contractor

4.86(
431
)
Approved Pro

William G Hyman Electrical Contractor

4.86(
431
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
45 years of experience

Voted Best service for over 50 years. Our trained experienced electricians can offer you a full range electrical work from expert troubleshooting & repair of electrical systems, installation of new outlets, switches, lighting and other electrical installation services. Whether it is one light fixture or a comprehensive wiring service upgrade or Heavy-Up, we have the necessary tools, knowledge and experience to turn your plan into reality. For immediate service or help answering any questions, please don't hesitate to call 301-622-1777 or email us directly. [email protected]

"I was very satisfied with the service provided by the William Hyman Electrical Contractor team. The electricians were very professional and efficient. They resolved the electrical issues in a timely manner. Very respectful of home and family members. I would highly recommend this company."

zetta l on August 2025

Voted Best service for over 50 years. Our trained experienced electricians can offer you a full range electrical work from expert troubleshooting & repair of electrical systems, installation of new outlets, switches, lighting and other electrical installation services. Whether it is one light fixture or a comprehensive wiring service upgrade or Heavy-Up, we have the necessary tools, knowledge and experience to turn your plan into reality. For immediate service or help answering any questions, please don't hesitate to call 301-622-1777 or email us directly. [email protected]

"I was very satisfied with the service provided by the William Hyman Electrical Contractor team. The electricians were very professional and efficient. They resolved the electrical issues in a timely manner. Very respectful of home and family members. I would highly recommend this company."

zetta l on August 2025


Avatar for Diaz Painting & Renovations LLC

Diaz Painting & Renovations LLC

4.93(
111
)
Approved Pro

Diaz Painting & Renovations LLC

4.93(
111
)
Approved Pro
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
15 years of experience

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of painting services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"This was our second time using Diaz for our painting and home renovations. Once again he and his team did an amazing job. For this job, we had Diaz paint our hallway and master, redo our stairs and stair railing, re-finish and stain the hardwood floors, remove old baseboard heaters, and do a complete renovation of our upstairs bathroom (new paint, new floors, new vanity, new toilet, new lighting, new exhaust fan, etc.). He also helped haul out old furniture, removed an old (non-functional) oil gas tank from the basement, and replaced a broken storm door. One of the great things about working with Diaz is that the answer is always yes. His team is more than just painters - he has skilled craftsmen, workers with expertise in plumbing and electric, and everything else. There is no need to deal with anyone else. If you need something done in (or around) your house Diaz either can do it or has a guy. After contacting Diaz, he came right out for a free estimate. He listened carefully to what we wanted but also made a number of important suggestions to improve the results. Each day his team was hard at work - they were trustworthy and courteous, and cleaned up perfectly each day. Diaz goes the extra mile to make things convenient - including hauling away trash/junk, recommending a local showroom, and picking up materials that we had ordered for the job. As with any major project, there were a few bumps in the road. But Diaz worked through the curveballs with good communication. They finished on-time and on budget, and the results were perfect. If you’re looking for versatility, reliability, attention to detail, and overall excellence, then Diaz is your man ."

Jared A on November 2024

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of painting services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"This was our second time using Diaz for our painting and home renovations. Once again he and his team did an amazing job. For this job, we had Diaz paint our hallway and master, redo our stairs and stair railing, re-finish and stain the hardwood floors, remove old baseboard heaters, and do a complete renovation of our upstairs bathroom (new paint, new floors, new vanity, new toilet, new lighting, new exhaust fan, etc.). He also helped haul out old furniture, removed an old (non-functional) oil gas tank from the basement, and replaced a broken storm door. One of the great things about working with Diaz is that the answer is always yes. His team is more than just painters - he has skilled craftsmen, workers with expertise in plumbing and electric, and everything else. There is no need to deal with anyone else. If you need something done in (or around) your house Diaz either can do it or has a guy. After contacting Diaz, he came right out for a free estimate. He listened carefully to what we wanted but also made a number of important suggestions to improve the results. Each day his team was hard at work - they were trustworthy and courteous, and cleaned up perfectly each day. Diaz goes the extra mile to make things convenient - including hauling away trash/junk, recommending a local showroom, and picking up materials that we had ordered for the job. As with any major project, there were a few bumps in the road. But Diaz worked through the curveballs with good communication. They finished on-time and on budget, and the results were perfect. If you’re looking for versatility, reliability, attention to detail, and overall excellence, then Diaz is your man ."

Jared A on November 2024


Avatar for GAC Services

GAC Services

4.86(
268
)
Approved Pro

GAC Services

4.86(
268
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
55 years of experience

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

"Highly professional, knowledgeable and well behaved technician. Prices offered were good too. I definitely recommend the company."

Deepak U on February 2025

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

"Highly professional, knowledgeable and well behaved technician. Prices offered were good too. I definitely recommend the company."

Deepak U on February 2025


Avatar for H.H.S Electric, LLC

H.H.S Electric, LLC

4.90(
84
)
Approved Pro

H.H.S Electric, LLC

4.90(
84
)
Approved Pro
Customers say: True professional
7 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! I started my business in 2018 and have done mostly residential but I am proficient in commercial as well. I’m very excited to get more customers using this service and become a force in the industry in this area. I am very dedicated to my clients and try my best to accommodate all concerns and instructions. I love the fact I have mastered a trade that can provide for my family which includes an 18 year old, 4-year old paternal twins, and a 2 year old!!!

"Tom is an excellent electrician, with top notch talent and very reasonable pricing. 100% recommend him! Smart, fast, and clean and tidy work, all at a a great price. Give him a call. He will take good care of your situation. "

Matt H on December 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! I started my business in 2018 and have done mostly residential but I am proficient in commercial as well. I’m very excited to get more customers using this service and become a force in the industry in this area. I am very dedicated to my clients and try my best to accommodate all concerns and instructions. I love the fact I have mastered a trade that can provide for my family which includes an 18 year old, 4-year old paternal twins, and a 2 year old!!!

"Tom is an excellent electrician, with top notch talent and very reasonable pricing. 100% recommend him! Smart, fast, and clean and tidy work, all at a a great price. Give him a call. He will take good care of your situation. "

Matt H on December 2025

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Generator Install questions, answered by experts

No, this is extremely dangerous, often illegal, and you should never attempt it. If you connect your generator to your home without a transfer switch, the generated power can backfeed, essentially flowing back into the utility lines. Backfeeding exposes a significant threat of fatalities or harm to you and utility personnel, in addition to jeopardizing the structural integrity of your home.

Potential benefits of using a natural gas generator include reducing your carbon footprint, lower likelihood of carbon monoxide exposure, budget-friendly operating costs, and low-maintenance, continuous fuel supply. Some possible drawbacks, though, include higher initial installation costs, dependency on a natural gas supply, and installation complexity. Keep in mind that pros and cons will vary based on the type and brand of natural gas generator. 

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

When properly maintained, natural gas generators can last a long time, as much as 20 to 40 years. They have relatively few needs compared to generators with other fuel types. However, the generator’s lifespan ultimately depends on how often the generator is used and for how long it’s left running.

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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