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Verified Reviews for Generator Install pros in Washington, VA

*The Angi rating for Generator Install companies in Washington, VA 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 Washington, VA 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 March 24, 2026

Find Generator install pros in Washington

Avatar for SciFiHomes Inc
SciFiHomes Inc
5.0(
27
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Washington, VA and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"The guys arrived exactly at the prearranged time. They informed me that the work would take longer than the '2 man hours' that I bought through the Angie's List Deals before they began the job - which I appreciated.  They were on task and professional the whole time. They explained any problems they encountered while re-installing the old light fixture - need new bulbs.  They cleaned up any mess they made at the end of the job. Rates and cost of supplies were reasonable.  I WILL BE CALLING THEM BACK FOR ANY OTHER ELECTRICAL WORK IN THE FUTURE.
"
Cummins Onan 400A ATS
Cummins Onan 20kW
Briggs & STratton Standby Generator
Response time9 hrs
8 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Varco Electric
Varco Electric
5.0(
9
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Washington, VA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"They were wonderful. They did a great job. They had some helpful suggestions and more wonderful to work with. I would definitely hire them again."
Response time9 hrs
3 neighbors recently requested a quote
Recommended by88%of homeowners
Request Quote
Avatar for Raufi Services LLC
Raufi Services LLC
5.0(
27
)
Fixed Generator - Install

Serving Washington, VA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"You cannot find a better contractor than Raufi Services. We hired Raufi Services to install 240V/50A wiring for a hot tub. They were extremely efficient, polite, and timely. The quality of their work was outstanding--I couldn't even tell they ran the wiring in the house after they were done. They were also very competitive in their cost estimate."
Response time1 day
6 neighbors recently requested a quote
Recommended by59%of homeowners
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Avatar for Parrish Services, Inc.
Parrish Services, Inc.
3.9(
52
)
Portable Generator - Repair

Serving Washington, VA and surrounding areas

Approved (Corporate)

In business since 1997

Free estimates

Emergency services offered

"The technician was timely and took care of general yearly maintenance. I wished we had used them to install our generator! We will recommend to others and use again"
AC Replacement
AC Replacement
AC Replacement
Generator Installation
Generator Installation

+3

Recommended by89%of homeowners
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Avatar for Evergreen Electric LLC
Evergreen Electric LLC
4.9(
36
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Washington, VA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"They did a good job.  I got them from Angie’s List.  The price is a little high but they did good work.  They were very nice.  I am pleased with what they did."
Recommended by100%of homeowners
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R C Electrical
4.4(
9
)
Fixed Generator - Install

Serving Washington, VA and surrounding areas

In business since 2008

Free estimates

Warranties offered

"The men showed up on time and performed the task in a timely fashion. They were very professional and I will certainly use them in the future. They installed a 220 line for my dryer and corrected some work previously done before we moved here. Overall, I was very pleased with their work and friendliness while completing the work."
Response time2 days
Recommended by100%of homeowners
Request Quote
KDE Electric, LLC
5.0(
2
)
Fixed Generator - InstallFixed Generator - Repair

Serving Washington, VA and surrounding areas

In business since 2003

Free estimates

"Quality is top notch.Emil is a true craftsman,taking pride in his work.We had 2 other companies in to discuss generators. Emil took the time to walk us thru all we needed to know about making a knowledgeable decision. Work was completed in good order through some cold bitter weather.Perfect Job, I would highly recommend KDE."
Away from the house, it has a good ventilation
Neglected generator
Another high platform for flood areas
Guaranteed professional!
Underground propane tank & generator

+16

Response time11 hrs
Recommended by100%of homeowners
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Showing 1-10 of 30
Generator Install questions, answered by experts

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house 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.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

Costs depend on generator type, labor, and additional wiring or transfer switch requirements.

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

The Washington, VA 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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