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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon17
    Verified generator installs reviews

Find Generator install pros in Keswick

Robertson Electric
New to Angi

Serving Keswick, VA and surrounding areas

Approved

In business since 1968

Free estimates

Credit card accepted

At Robertson Electric, we're proud to serve our community, and we look forward to keeping you comfortable for many years. With a dedication to excellence and customer satisfaction, our professional team provides award-winning service in heating, air conditioning, electrical, plumbing, and indoor air quality in Charlottesville, Virginia, and surrounding areas.\n\nOur founder, Bill Robertson's vision of delivering exceptional service at a reasonable rate has guided us for over 50 years. As one of the largest full-service companies in the area, we take pride in serving long-standing customers, ensuring their homes are comfortable year-round.\n\nWe believe in customer service, guaranteed satisfaction, and a commitment to quality. Our expert technicians handle every job with precision and care to ensure the best service and customer experience possible.\n

Avatar for Charlottesville Generators
Charlottesville Generators
4.8(
9
)

Serving Keswick, VA and surrounding areas

In business since 2004

Free estimates

"Three years after I bought the generator, our power was out on a Sunday morning and the generator did not start. They were out in an hour and had it working. What more could you ask for?"
Recommended by100%of homeowners
Avatar for Evergreen Electric LLC
Evergreen Electric LLC
4.9(
36
)

Serving Keswick, VA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"We wanted to try a local contractor and came across Evergreen by chance.  It was an excellent experience.  Thad was knowledgeable and professional and easy to work with.  The crew was exactly the same.  Nice, respectful, competent.  The worked around my crazy schedule as we had other improvements going on.  They had a slight delay in getting the generator as there was a back order, but called and let us know and we worked around it.  Laurie in the office was equally good and kept us in communication on details or things to do and schedule etc.  I could not be more happy with the experience on such a big purchase.  They were always accommodating and helpful.  The Generator and switch were high quality and I think the price was fair.  They even did some easy side things for us for no charge.  We will definitely use them again soon to install an attic fan."
Recommended by100%of homeowners
Avatar for Ultimate Electrical Services
Ultimate Electrical Services
5.0(
15
)

Serving Keswick, VA and surrounding areas

In business since 2020

Free estimates

Offers commercial services

"Brad came to my house, gave me his expert advise on how to wire up my generator. Excellent service very nice quick install and gave me a tutorial on how to operate when power goes out. 10/10 for this guy heâ  s awesome definitely the electrician guy to have on hand ð  Â"
Response time10 hrs
Recommended by93%of homeowners
Avatar for Livengood Electrical LLC
Livengood Electrical LLC
4.4(
18
)

Serving Keswick, VA and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"The job went great! Livengood Electric went over and above my expectations for this project. This wasn’t the easiest project out there on sure but with Jake’s expertise he was able to make short work of the project. We have a new service panel do you provide us years ofTrouble free electrical service, and a new generator but when the power goes out! We couldn’t be happier! Thanks again Jake!"
Electrical Project
Vanity lighting, fan, can lights, gfci receptacle and switches.
50 amp breaker panel with surge protector
Electrical Project
Electrical Project

+24

Recommended by93%of homeowners
Avatar for Woodson’s Electric
Woodson’s Electric
5.0(
5
)

Serving Keswick, VA and surrounding areas

Free estimates

Emergency services offered

Warranties offered

Hi, I’m Matt Woodson, owner of Woodson’s Electric. With over 22 years of hands-on experience in the electrical trade, I specialize in delivering high-quality, code-compliant electrical solutions with a strong focus on safety, precision, and long-term reliability.\n\nAt Woodson’s Electric, we don’t believe in shortcuts. Every project—whether it’s a full service upgrade, generator installation, EV charger setup, or detailed troubleshooting—is completed with expert craftsmanship and attention to detail. I take the time to properly diagnose issues, explain solutions clearly, and ensure every job is done right the first time.\n\nAs a family-oriented business owner, I understand the importance of trust when working in your home. I treat every project with the same care and respect I would expect for my own family, building lasting relationships through honesty, professionalism, and dependable service.\n\nIf you’re looking for a skilled electrician who takes pride in quality work and stands behind

This is the finished panel
This is half way done
Generator transfer switch install.
Additional Photos
Additional Photos

+15

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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 can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

While the rating will tell you how many watts the refrigerator needs at the peak of its cycle, it requires additional wattage to start. At the bare minimum, you’ll need a 1,500-watt generator to get the fridge up and running after a blackout. A 2,000-watt generator should be sufficient for most home refrigerators.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

The Keswick, VA homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.