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Average homeowner rating star icon4.9
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Verified generator installations reviews

Generator installers in Potomac Falls

Avatar for Generator Supercenter of Northern Virginia
Generator Supercenter of Northern Virginia
21005 Ashburn Crossing Dr.
5.00(
3
)
Approved Pro
Generator Supercenter of Northern Virginia
21005 Ashburn Crossing Dr.
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
82 local quotes requested

When it comes to ensuring your home in Northern Virginia has power in the case of an emergency, be sure to turn to the professionals at Generator Supercenter. As the #1 Generac Dealer in North American, we provide homeowners with top-of-the-line whole home Generac Home Standby Generator solutions. We offer full turnkey installation, 24/7 monitoring, long-term maintenance support, as well as Generac generator service and repair from our team of factory certified technicians. At Generator Supercenter, our customers are our first priority. We care more about forming solid relationships than earning a quick buck. We want to be your generator company for life. That is why we strive to exceed customer expectations – we’re not satisfied until you are!

"Yes, this was everything I needed"

Milton H on January 2023

When it comes to ensuring your home in Northern Virginia has power in the case of an emergency, be sure to turn to the professionals at Generator Supercenter. As the #1 Generac Dealer in North American, we provide homeowners with top-of-the-line whole home Generac Home Standby Generator solutions. We offer full turnkey installation, 24/7 monitoring, long-term maintenance support, as well as Generac generator service and repair from our team of factory certified technicians. At Generator Supercenter, our customers are our first priority. We care more about forming solid relationships than earning a quick buck. We want to be your generator company for life. That is why we strive to exceed customer expectations – we’re not satisfied until you are!

"Yes, this was everything I needed"

Milton H on January 2023


Avatar for Absolute Electric LLC
Absolute Electric LLC
111 Carpenter Dr
4.87(
837
)
Approved Pro
Absolute Electric LLC
111 Carpenter Dr
4.87(
837
)
Approved Pro
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
370 local quotes requested

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

"Robert did my work, he was very thorough, very detailed. This guy is a rock star! Will definitely use them again in the future!"

TROY P on September 2024

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

"Robert did my work, he was very thorough, very detailed. This guy is a rock star! Will definitely use them again in the future!"

TROY P on September 2024


Avatar for Beacon Home Services
Beacon Home Services
10498 Colonel Ct
4.71(
1,013
)
Approved Pro
Beacon Home Services
10498 Colonel Ct
4.71(
1,013
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
629 local quotes requested

When you have an electrical or plumbing issue, you want it solved quickly for the safety and comfort of you and your family. Our technicians genuinely care about our customers, which is one of the reasons why we have been a trusted electrical and plumbing services company in the area for the past 20+ years. Our technicians have well stocked trucks and are able to do most repairs the same day. We offer 5-star service, same-day services, upfront pricing, as well as various financing options. Our technicians are highly trained and confident in their skills and ability to handle any electrical and plumbing issue in your home and stand behind all our recommended repairs.

"Very good service"

Ed W on October 2024

When you have an electrical or plumbing issue, you want it solved quickly for the safety and comfort of you and your family. Our technicians genuinely care about our customers, which is one of the reasons why we have been a trusted electrical and plumbing services company in the area for the past 20+ years. Our technicians have well stocked trucks and are able to do most repairs the same day. We offer 5-star service, same-day services, upfront pricing, as well as various financing options. Our technicians are highly trained and confident in their skills and ability to handle any electrical and plumbing issue in your home and stand behind all our recommended repairs.

"Very good service"

Ed W on October 2024


Here to help you with all your plumbing and electrical and HVAC needs

"Our gas leak was repaired almost immediately."

Marlene S on March 2025


Avatar for J A Electric LLC.
J A Electric LLC.
4.79(
28
)
Approved Pro
J A Electric LLC.
4.79(
28
)
Approved Pro
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
93 local quotes requested

10 Years Of Experience. Provides Exceptional & Guaranteed Residential Work. Put Clients Needs First Before Anything. www.jaelectricllc.net

"He not only installed an EV charger for me but also set up a charging station outside my home. Initially, I wasn't satisfied with it and called him to express my concerns. He returned promptly and made the necessary adjustments. He is very dedicated to his work and understands his customers' feelings. I highly recommend his services!."

Jay S on April 2025

10 Years Of Experience. Provides Exceptional & Guaranteed Residential Work. Put Clients Needs First Before Anything. www.jaelectricllc.net

"He not only installed an EV charger for me but also set up a charging station outside my home. Initially, I wasn't satisfied with it and called him to express my concerns. He returned promptly and made the necessary adjustments. He is very dedicated to his work and understands his customers' feelings. I highly recommend his services!."

Jay S on April 2025


Avatar for Kolb Electric Inc
Kolb Electric Inc
8530 Cinder Bed Rd
4.22(
216
)
Approved Pro
Kolb Electric Inc
8530 Cinder Bed Rd
4.22(
216
)
Approved Pro
Customers say: Super punctual
191 local quotes requested
100 years of experience

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


Avatar for Snell Heating & Air Conditioning
Snell Heating & Air Conditioning
21660 Ridgetop Cir
4.66(
2,453
)
Approved Pro
Snell Heating & Air Conditioning
21660 Ridgetop Cir
4.66(
2,453
)
Approved Pro
Customers say: Super punctual
136 local quotes requested
53 years of experience

Family owned & operated. Financing available. Credit cards. All work done by experienced professionals to ensure consistent high quality. Award winning company at your service.

"Snell installed our new HVAC and we were initially pleased. However, the unit failed a county inspection. When Snell reached out to set up a repair, our window was 10am-2pm. The technician showed up at 4pm without the materials he needed. He promptly left having done nothing, said he would get what he needed and return. We heard nothing."

Dian B on August 2024

Family owned & operated. Financing available. Credit cards. All work done by experienced professionals to ensure consistent high quality. Award winning company at your service.

"Snell installed our new HVAC and we were initially pleased. However, the unit failed a county inspection. When Snell reached out to set up a repair, our window was 10am-2pm. The technician showed up at 4pm without the materials he needed. He promptly left having done nothing, said he would get what he needed and return. We heard nothing."

Dian B on August 2024


Avatar for Provident Electric
Provident Electric
4253 Old National Pike
4.91(
77
)
Approved Pro
Provident Electric
4253 Old National Pike
4.91(
77
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
44 local quotes requested

Family owned and operated Electrical contracting company, servicing residential and commercial clients. Specializing in back-up generators, full rehabs, remodels and additions. We also have bucket truck service available. We are Licensed and insured in most metropolitan cities and counties in Maryland, DC, Va. Minimum service charge applies per service call.

"Larry and his crew upgraded our under cabinet lighting with new LED lighting, and specialized outlet. Not only was our home and its contents treated as if they lived here, the job was done professionally. So much so, that the only issue we had was when the switch/outlet face plate screws came loose. I didn’t even bother calling Larry, I tightened them myself. The lighting is on, literally 24 hours per day since the install, with zero issues. Love these guys."

Chris F on December 2024

Family owned and operated Electrical contracting company, servicing residential and commercial clients. Specializing in back-up generators, full rehabs, remodels and additions. We also have bucket truck service available. We are Licensed and insured in most metropolitan cities and counties in Maryland, DC, Va. Minimum service charge applies per service call.

"Larry and his crew upgraded our under cabinet lighting with new LED lighting, and specialized outlet. Not only was our home and its contents treated as if they lived here, the job was done professionally. So much so, that the only issue we had was when the switch/outlet face plate screws came loose. I didn’t even bother calling Larry, I tightened them myself. The lighting is on, literally 24 hours per day since the install, with zero issues. Love these guys."

Chris F on December 2024


Avatar for SciFiHomes Inc
SciFiHomes Inc
PO Box 308
5.00(
26
)
Approved Pro
SciFiHomes Inc
PO Box 308
5.00(
26
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 local quotes requested

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


Avatar for M&D Home Services
M&D Home Services
Woodridge Va
5.00(
3
)
Approved Pro
M&D Home Services
Woodridge Va
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
52 local quotes requested

Home services remodelin Garage Door instalations Garage Door Repair Master Electricians Camera instalations

"Quick and professional. We will hire again."

Crystal G on November 2024

Home services remodelin Garage Door instalations Garage Door Repair Master Electricians Camera instalations

"Quick and professional. We will hire again."

Crystal G on November 2024

...
Showing 1-10 of 138

Generator installations FAQs

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

The homeowners guide to generator installations
From average costs to expert advice, get all the answers you need to get your job done.
A portable inverter generator
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The average cost of a whole-house generator falls between $5,000 and $25,000. Keep reading to learn how much you can expect to spend.
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Apr 1, 2025
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A whole house generator can keep your home running during a power outage, but can it handle the energy demands of an air conditioner? Here’s what to consider.
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Apr 1, 2025
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Natural gas generators emit carbon monoxide, a harmful gas. Learn about what carbon monoxide is and tips to operate your generator safely.
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Is a whole-house generator worth it? Discover the key factors influencing ROI and whether it's the right choice for your home.
outdoor diesel power generator
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Diesel remains a popular fuel option for a variety of home generators, but you will need to plan your maintenance carefully. Here’s how it works.
emergency power supply outside home
Apr 4, 2025
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How much does it cost to run a standby generator? The answer varies based on the type and size of the generator. Find out more.
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