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Avatar for Holistiq Building Systems and Services LLC
Holistiq Building Systems and Services LLC
5.0(
8
)
Fixed Generator - Install

Serving Gretna, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"I would like to recommend Joshua Smith as a Tesla installer and overall electrician. He did a great job for my wife and I on the installation of our powerwall 3 and car chargers within our garages as well as trouble shooting some other electrical problems at our new home at Smith Mountain Lake. Additionally, he answers phone calls and shows up on time. Again, we highly recommend Joshua."
Response time5 hrs
12 neighbors recently requested a quote
Avatar for Rogers Heating And Cooling
Rogers Heating And Cooling
4.6(
16
)
Fixed Generator - InstallPortable Generator - Install

Serving Gretna, VA and surrounding areas

Approved

Super Service Award Winner

In business since 1996

Free estimates

Emergency services offered

"Yes,Roger Heating and Cooling did a excellent job.Not only did they install new heat pump and new furnace,.Men were courtesy and polite,showed respect for my home by wearing covers over their shoes.They explain the process of what they had to due.They answered any questions I had about installation. I had no idea that the process would be so smooth. I truly appreciate this company, from first day that representative came out. Too look at what need to be done to replace my systems. Thank them for email follow-up until day came to installation, and email after job was completed. It only took 4 hours for installation.I recommended this company too all my friends and family.Thank you so much too Roger Heating and Air.I would rate this company with 1,000 percent. As the completed of job they cleaned up their mess inside and outside."
Heat Pump Change Out
The old oil furnace :-(
Heat Pump Change Out
The new gas furnace! :-)
Heat Pump Change Out

+6

Response time1 day
Response rate100%
85 neighbors recently requested a quote
Avatar for Red Clay Mechanical LLC
Red Clay Mechanical LLC
5.0(
3
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Gretna, VA and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

"I had an excellent experience working with this company from start to finish. The team was professional, responsive, and truly cared about providing quality service. They communicated clearly throughout the entire process and made everything stress-free and easy to understand. What stood out most was their attention to detail and dedication to customer satisfaction. It’s hard to find businesses these days that genuinely go above and beyond, but this company absolutely did. The work was completed on time, exceeded my expectations, and the quality was outstanding! I highly recommend this company to anyone looking for reliable, honest, and professional service. I will definitely be using them again in the future!"
Mounted 75" TV
Handyman Projects
Handyman Projects
Handyman Projects
Handyman Projects

+8

7 neighbors recently requested a quote
Wynn's Electric, LLC
4.9(
6
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Gretna, VA and surrounding areas

In business since 2021

Free estimates

Credit card accepted

"Kenneth Wynn came to install a generator transfer switch box inside my house and a plug for outside. He was very professional and was training two younger guys who were very nice and courteous. I was thankful that the Lord had put me in contact with somebody that I could trust! I would definitely call him again for any electrical work that I might need in the future."
Response time10 hrs
Recommended by100%of homeowners
Avatar for Jordan Home Maintenance
Jordan Home Maintenance
5.0(
2
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Gretna, VA and surrounding areas

In business since 1993

Free estimates

Emergency services offered

"Barry mows and blows our lawn about weekly.  On occasion I have asked him to plant a few things, remove some walkway bricks to the basement door area.  He is always cheerful and willing to help.  He has won the business of several of my neighbors.
"
Recommended by100%of homeowners
Avatar for The Home Depot - Generators
The Home Depot - Generators
2.5(
1
)
Fixed Generator - Install

Serving Gretna, VA and surrounding areas

In business since 2003

Free estimates

Small jobs welcome

Today, we're proud to be the world's largest home improvement retailer. In 2,300 stores across North America, we aspire to excel in service – to our customers, associates, communities and shareholders. That's what leadership means to us. That's The Home Depot difference.

Generators
Generators
Generators
Generator
Generators

+5

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Generator Install questions, answered by experts

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

These advanced generators use a key fob or a smartphone app to remotely start, which is ideal for getting power back on immediately without venturing outside. This feature is more common on whole home generators, but you may be able to find it on large portable generators, too.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

The Gretna, VA homeowners’ guide to generator installs

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