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Avatar for SciFiHomes Inc
SciFiHomes Inc
5.0(
27
)
Fixed Generator - InstallPortable Generator - InstallFixed Generator - Repair+4 more

Serving Washington, VA and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"SciFiHomes, Inc. did a great job installing our whole-house generator. They are friendly, efficient, reliable. They take the time to do things right and make sure the homeowner understands the equipment."
Cummins Onan 400A ATS
Cummins Onan 20kW
Briggs & STratton Standby Generator
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Raufi Services LLC
Raufi Services LLC
5.0(
29
)
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
Response rate100%
4 neighbors recently requested a quote
Oaken Electrical Services
4.9(
9
)
Portable Generator - Repair

Serving Washington, VA and surrounding areas

In business since 2024

Credit card accepted

"This electrician is an amazing hard worker! He installed a motion sensor light in my laundry room with excellently! He has also done other work around my house like fixing my generator, figuring out why my outlet doesnâ t work ectâ ¦ He is really fun to talk to and his overall customer service is a 10/10! Would recommend"
Response time10 mins
Response rate91%
Recommended by75%of homeowners
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
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
Avatar for Malone Electrical Solutions LLC
Malone Electrical Solutions LLC
4.1(
9
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Washington, VA and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"Malone Electrical was competent and professional. Pricing was overall fair but nowhere near cheap. We hired him to install an upgrade to our electrical service from 80amps to 200amps and that's what we got, in a reasonable amount of time. He wasnt overly friendly though and would not baby the customer in any way. I would hire him again."
Electrical Project
Recommended by75%of homeowners
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Generator Install questions, answered by experts

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.

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.

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. 

A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

If you’re wondering whether gas generators produce carbon monoxide, know that natural gas generators do not produce carbon monoxide if they are functioning properly, as natural gas burns cleanly. However, if the generator malfunctions and the gas does not burn completely, there is potential for carbon dioxide to be produced. To prevent malfunctions, it's crucial to perform regular maintenance, including running the generator weekly and scheduling professional inspections every 6 to 12 months. Also, be sure to test your carbon monoxide detectors regularly to ensure they function in the rare case of the generator producing carbon monoxide.

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.