Get matched with top generator installers in Knoxville, MD
There are 8 highly-rated local generator installers.
Verified Reviews for Generator Installation pros in Knoxville, MD
*The Angi rating for Generator Installation companies in Knoxville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Installation needs.
*The HomeAdvisor rating for Generator Installation companies in Knoxville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Installation needs.
Last update on June 12, 2025
Generator installers in Knoxville
If you are looking for a HVAC Contractor, a Plumbing Contractor, or an Electrical Contractor to provide you with great service, you've come to the right place. We provide heating services, air conditioning services, plumbing services, and electrical services to our customers in Frederick and the surrounding Counties, the Pan Handle of West Virginia, and Northern Virginia, from our offices located in Frederick MD. With 3 generations of experience in providing heating, air conditioning, plumbing, and electrical services, we are dedicated to providing the best possible products and services for you, and your family.
"Great service very prompt and easy to work with."
Randy W on May 2025
If you are looking for a HVAC Contractor, a Plumbing Contractor, or an Electrical Contractor to provide you with great service, you've come to the right place. We provide heating services, air conditioning services, plumbing services, and electrical services to our customers in Frederick and the surrounding Counties, the Pan Handle of West Virginia, and Northern Virginia, from our offices located in Frederick MD. With 3 generations of experience in providing heating, air conditioning, plumbing, and electrical services, we are dedicated to providing the best possible products and services for you, and your family.
"Great service very prompt and easy to work with."
Randy W on May 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 K 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 K on February 2025
We are a family owned and operated business that has been serving the Baltimore, Washington Metropolitan area since 1925. We are committed to providing superior electrical services. The valuable advantages we can offer you are great service, high quality and experienced workers at a competitive price.
"Do not use this company. They will rip you off. The contract was for eight 300W LED 40 ft pole lights, but I caught them redhanded installing 240W. Who does that? Then, they broke my lock and broke into my sprinkler room which I saw on my video which they admitted. Then, Kolb sued me for not paying the bill which I disputed due to lost tools as result of the break-in. Who does that breaking into a customer's sprinkler room and not informing that they did. I had to catch them on my video. Not only that it took over one year to the work proposed work. TOTAL FRAUD. I will be going to court...."
John A on November 2023
We are a family owned and operated business that has been serving the Baltimore, Washington Metropolitan area since 1925. We are committed to providing superior electrical services. The valuable advantages we can offer you are great service, high quality and experienced workers at a competitive price.
"Do not use this company. They will rip you off. The contract was for eight 300W LED 40 ft pole lights, but I caught them redhanded installing 240W. Who does that? Then, they broke my lock and broke into my sprinkler room which I saw on my video which they admitted. Then, Kolb sued me for not paying the bill which I disputed due to lost tools as result of the break-in. Who does that breaking into a customer's sprinkler room and not informing that they did. I had to catch them on my video. Not only that it took over one year to the work proposed work. TOTAL FRAUD. I will be going to court...."
John A on November 2023
The Kline family has been serving customers in Hagerstown, Frederick, Martinsburg, Chambersburg, and Winchester for over 30 years. We are excited to continue our legacy of providing quality electrical services to you and your family into the future. If you are in need of electrical repairs or installations, contact us today. The Kline team consists of some of the most professional and knowledgeable electricians in the four state region. There is nothing that we can't handle. We are a full service company offering comprehensive repair and installation services, and we are ready to take on your project. Below are just a few of the services we offer at Kline: -Surge protection -Electrical panel maintenance and repair -New electrical panel installation -Electrical service upgrades -Meter base install, maintenance, and repair -Electric vehicle (EV) charging stations -Lighting upgrades (LED) -Outlet repair and installations -Generator installs and services -Whole home or partial rewiring services -Full electrical system installs
The Kline family has been serving customers in Hagerstown, Frederick, Martinsburg, Chambersburg, and Winchester for over 30 years. We are excited to continue our legacy of providing quality electrical services to you and your family into the future. If you are in need of electrical repairs or installations, contact us today. The Kline team consists of some of the most professional and knowledgeable electricians in the four state region. There is nothing that we can't handle. We are a full service company offering comprehensive repair and installation services, and we are ready to take on your project. Below are just a few of the services we offer at Kline: -Surge protection -Electrical panel maintenance and repair -New electrical panel installation -Electrical service upgrades -Meter base install, maintenance, and repair -Electric vehicle (EV) charging stations -Lighting upgrades (LED) -Outlet repair and installations -Generator installs and services -Whole home or partial rewiring services -Full electrical system installs
We are your 1-Stop Source for your Standby Generator Needs! Factory Authorized Cummins Power Generation, Generac and Briggs & Stratton Dealers for Sales, Installation & Service SciFiHomes, Inc. was founded to provide the Shenandoah Valley and Surrounding Areas with a Hi-Tech Electrical Contractor that is a 1-stop solution for the Homeowner and Small Business Owner (from Standby Generators to Security Systems to Home Theaters and most everything in between). SciFiHomes is committed to providing the best electrical/electronic products and solutions available, competitive pricing, our signature high-quality and high-performance installation, and unmatched technical support. SciFiHomes's mission is to offer the most comprehensive personal attention to your Personal, Family, and Business electrical/electronic needs or desires.
"Highly recommended. The entire process was performed expertly and efficiently. In our initial meeting, Tony explained what would be needed in detail and we were given the pros and cons of all options. We went with the Cummins which was a bit more expensive but you get what you pay for and we will be patting ourselves on the back during the next four-day outage. They provided a detailed installation schedule which they easily met. Installation went smoothly with zero problems. Marshall, Steve and Tony are masters at their trade."
Paul J on October 2019
We are your 1-Stop Source for your Standby Generator Needs! Factory Authorized Cummins Power Generation, Generac and Briggs & Stratton Dealers for Sales, Installation & Service SciFiHomes, Inc. was founded to provide the Shenandoah Valley and Surrounding Areas with a Hi-Tech Electrical Contractor that is a 1-stop solution for the Homeowner and Small Business Owner (from Standby Generators to Security Systems to Home Theaters and most everything in between). SciFiHomes is committed to providing the best electrical/electronic products and solutions available, competitive pricing, our signature high-quality and high-performance installation, and unmatched technical support. SciFiHomes's mission is to offer the most comprehensive personal attention to your Personal, Family, and Business electrical/electronic needs or desires.
"Highly recommended. The entire process was performed expertly and efficiently. In our initial meeting, Tony explained what would be needed in detail and we were given the pros and cons of all options. We went with the Cummins which was a bit more expensive but you get what you pay for and we will be patting ourselves on the back during the next four-day outage. They provided a detailed installation schedule which they easily met. Installation went smoothly with zero problems. Marshall, Steve and Tony are masters at their trade."
Paul J on October 2019
With over 11 years experience in the electrical industry, Mohamed Electric is your industry expert in Prince George County and the surrounding areas. We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a locally owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!
With over 11 years experience in the electrical industry, Mohamed Electric is your industry expert in Prince George County and the surrounding areas. We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a locally owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!
Hello future friends and clients. I am a commercial and residential electrician with16 years’ of experience. I absolutely love what I do and I am an insured, licensed Electrical Master in MD, VA, and DC. I pride myself on having a company that meets a client’s needs in a timely manner at a reasonable cost. We have become an example of quality work, superb technical skills, and excellent customer service. I am eager to make all your electrical connections and visions come to life. It may sound tempting to DIY electrical work, but it is usually not the safest option. Before you know it you have caused bigger problems that will cost even more money. Let my company do your electrical work safely. Whether you need major renovations, or a simple light change I can help. I am bilingual (Spanish/English). My goal is to make you smile at the completion of every project.
"I just built my house a year ago and needed to add an EV charger to my garage. Trish called me within an hour and set up an appointment for Hugo to come out the next day. There were two additional parts to the job I needed done as well, and one of them was a bit more expensive than I was expecting... but honestly, I had no idea how much to expect for the third part of the job so I can't blame them at all. There was no pressure at all to complete the more expensive portion of the job when I told them I'd have to pass on it at the time. The actual job was scheduled for the following week, and Tommy and Kevin showed up on time and were done in less than 3 hours. They gave me a few recommendations for drywall repair as well since there were three small holes that needed cut to run the new circuit for the EV charger. Highly recommended... Hugo & Kevin were extremely knowledgeable and helpful with all questions from a new homeowner like myself."
Josh R on August 2021
Hello future friends and clients. I am a commercial and residential electrician with16 years’ of experience. I absolutely love what I do and I am an insured, licensed Electrical Master in MD, VA, and DC. I pride myself on having a company that meets a client’s needs in a timely manner at a reasonable cost. We have become an example of quality work, superb technical skills, and excellent customer service. I am eager to make all your electrical connections and visions come to life. It may sound tempting to DIY electrical work, but it is usually not the safest option. Before you know it you have caused bigger problems that will cost even more money. Let my company do your electrical work safely. Whether you need major renovations, or a simple light change I can help. I am bilingual (Spanish/English). My goal is to make you smile at the completion of every project.
"I just built my house a year ago and needed to add an EV charger to my garage. Trish called me within an hour and set up an appointment for Hugo to come out the next day. There were two additional parts to the job I needed done as well, and one of them was a bit more expensive than I was expecting... but honestly, I had no idea how much to expect for the third part of the job so I can't blame them at all. There was no pressure at all to complete the more expensive portion of the job when I told them I'd have to pass on it at the time. The actual job was scheduled for the following week, and Tommy and Kevin showed up on time and were done in less than 3 hours. They gave me a few recommendations for drywall repair as well since there were three small holes that needed cut to run the new circuit for the EV charger. Highly recommended... Hugo & Kevin were extremely knowledgeable and helpful with all questions from a new homeowner like myself."
Josh R on August 2021
En Motion Security Solutions is committed to excellence 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.
"Friendly, efficient installation. Got done early, answered all our questions. Would use them again."
Dennis B on April 2020
En Motion Security Solutions is committed to excellence 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.
"Friendly, efficient installation. Got done early, answered all our questions. Would use them again."
Dennis B on April 2020
Green Wave Electric, Inc., serves the District of Columbia and the Montgomery County area with excellent work at excellent prices. We pride ourselves on our combined experience of over 25 years in meeting our customer's electrical needs. We look forward to working with you and to provide you with the same first class customer service we have provided others over the years.
"Arrived 7:30 am next day to replace wall switch and install ceiling fixture. Time of job 25 minutes. All was very good but $155 may be on the high side - my only question. At billing time there was an additional $5 added for environment concern which was not mentioned when quote was given."
Ron C on June 2013
Green Wave Electric, Inc., serves the District of Columbia and the Montgomery County area with excellent work at excellent prices. We pride ourselves on our combined experience of over 25 years in meeting our customer's electrical needs. We look forward to working with you and to provide you with the same first class customer service we have provided others over the years.
"Arrived 7:30 am next day to replace wall switch and install ceiling fixture. Time of job 25 minutes. All was very good but $155 may be on the high side - my only question. At billing time there was an additional $5 added for environment concern which was not mentioned when quote was given."
Ron C on June 2013
Ewell Builders and Power company: the reliable contractor Serving the greater DMV area, we provide professional construction and electrical services for both residential and commercial clients. Our commitment to transparency ensures that you have all the information you need, leaving no questions unanswered. With years of experience, we've refined our approach to become one of the region's premier service providers. We leverage the latest technology to stay ahead of the competition and deliver top-notch results. Choose Ewell Builders and power company for reliable energy solutions you can count on.
"People are very nice and honest.. Did the work on time and did a good job. I did not like the thermostat that was installed. We are older and could not read the actual temp because it was such small print. It was also very hard to program. They installed the new one and took the time to show me how to use it, at no extra cost. Very happy with their work."
Marvin F on December 2020
Ewell Builders and Power company: the reliable contractor Serving the greater DMV area, we provide professional construction and electrical services for both residential and commercial clients. Our commitment to transparency ensures that you have all the information you need, leaving no questions unanswered. With years of experience, we've refined our approach to become one of the region's premier service providers. We leverage the latest technology to stay ahead of the competition and deliver top-notch results. Choose Ewell Builders and power company for reliable energy solutions you can count on.
"People are very nice and honest.. Did the work on time and did a good job. I did not like the thermostat that was installed. We are older and could not read the actual temp because it was such small print. It was also very hard to program. They installed the new one and took the time to show me how to use it, at no extra cost. Very happy with their work."
Marvin F on December 2020
FAQs for generator installation projects in Knoxville, MD
Installing a whole-house generator costs about $5,000 on average. Prices range from $1,550 to $8,500, depending on size, brand, fuel type, and assembly. The size of your whole-house generator is the most significant cost factor, with large homes with high energy demands costing the most to power. Types of whole-home generators include:
Portable generators with 1kW–7.5kW capacity: $500–$2,000
Partial generators with 9kW–20kW capacity: $2,000–$6,300
Whole-house generators with 22kW–48kW: $5,000–$18,000
When maintained properly, a whole-house generator can last up to 20 years. Costs to maintain and repair generators vary by location and type of generator, but you can expect to pay about $150 to $300 per year for annual generator maintenance checks. An experienced generator service technician will inspect your generator’s engine filter, starting mechanism, fuel, lubrication, and coolant levels to keep your generator in good working condition for as long as possible.
When choosing the right size generator for your needs, consider a few items to help calculate the wattage you’ll need. Start by determining which household items and appliances you want to power, and then add the wattages together. Check out the wattage of these essential appliances:
Refrigerator: 600 watts
Large dehumidifier: 700 watts
Large window air conditioner: 1,400 watts
Water heater: 3,000 watts
Running home appliances like these requires a partial or whole-house generator. A portable generator may be enough to power your home if you only plan to keep a refrigerator and freezer running.
Here’s what you can run with different wattages and types of generators:
Portable generator:
2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers.
4,000 watts will keep two large appliances operating and a few smaller devices.
8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.
Partial to whole-house generator:
20,000 watts and above will make it seem like your home’s power is still on.
The value of installing a whole-house generator is that your home has guaranteed power, even if the power grid in your area is down. Whether a whole-house generator is worth installing in your home depends on how often you use it, your home’s location, and your lifestyle. For example, installing a whole-house generator is likely worth it if you:
Experience frequent or prolonged power outages
Work from home
Store a lot of cold food
Have a sump pump
Have a pump for well water
Use electronic medical devices
Live in a climate requiring heating or cooling
- Brunswick
- Lovettsville
- Jefferson
- Harpers Ferry
- Bolivar
- Shannondale
- Point Of Rocks
- Middletown
- Keedysville
- Sharpsburg
- Braddock Heights
- Shenandoah Junction
- Ballenger Creek
- Waterford
- Shepherdstown
- Adamstown
- Ranson
- Buckeystown
- Lansdowne
- Charles Town
- Boonsboro
- Paeonian Springs
- Hillsboro
- Myersville
- Purcellville
- Urbana
- Leesburg
- Hamilton
- Frederick
- Fairplay
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