Top-rated generator install pros.

Get matched with top generator install pros in Bristol, VT

Enter your zip and get matched with up to 5 pros

Need a pro for your generator install project in Bristol, VT?

Select your specific project to find the pro for you.

Verified Reviews for Generator Install pros in Bristol, VT

*The Angi rating for Generator Install companies in Bristol, VT 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 Bristol, VT 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 August 28, 2025

Find Generator install pros in Bristol

McCormick Electrical, LLC
5.0(
4
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Bristol, VT and surrounding areas

Approved

In business since 2023

Free estimates

Offers commercial services

"Colin was prompt with his communication, responded within 24 hours to any inquiries, and made smart recommendations when we hired him to install our L2 Charger and replace a burnt-out switch in our kitchen. He worked smart & safe and finished them both in less time than I expected it to take. We would hire/recommend Colin to anyone seeking big or small project repairs."
Response time1 hour
Recommended by100%of homeowners
Request Quote
Avatar for Devino Electric & Mechanical
Devino Electric & Mechanical
4.2(
5
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Bristol, VT and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Fast response. Professional and timely service."
Response time2 days
Response rate89%
Recommended by50%of homeowners
Request Quote
Avatar for Rockys Electric
Rockys Electric
New to Angi
Portable Generator - Repair

Serving Bristol, VT and surrounding areas

Free estimates

Warranties offered

Credit card accepted

\nRockys Electric LLC is a family-owned and operated electrical company established in 2023, located in West Rutland. They offer a variety of services including heat pump installation, residential wiring, troubleshooting, commercial wiring, generator installation, service upgrades, panel swap outs, and automotive wiring harnesses. The company prides itself on a quick response time and provides free estimates within one hour of travel to West Rutland.

Additional Photos
Additional Photos
Additional Photos
Additional Photos
Request Quote
Avatar for Chris Fagnant Electrical and Construction
Chris Fagnant Electrical and Construction
New to Angi
Portable Generator - Repair

Serving Bristol, VT and surrounding areas

Free estimates

Emergency services offered

Small jobs welcome

General Construction, Remodeling, Electrical Service updates, New Constructions and Additions, landscaping and Handyman services, I work with clients to bring their vision to life. Fully insured and licensed in Multiple states, with over 26 years in the trades, an extensive knowledge of building codes with an emphasis on construction inspections and safety my goal is to provide craftsmanship and quality in a timely manner.

Dining Room
Request Quote
Adam Wiggett LLC
New to Angi
Generator - Install - For BusinessGenerator - Repair - For Business

Serving Bristol, VT and surrounding areas

In business since 2018

Free estimates

Emergency services offered

Adam Wiggett LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Request Quote
Showing 1-10 of 12
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. 

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.

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.

Yes, natural gas generators can work without electricity. Natural gas generators are a common type of backup or whole-house generator that operates when the electrical grid isn’t working. The trick is using a transfer switch (which usually needs to be installed with the generator) that safely switches the home electrical system from the power grid to generator power when needed.

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.

The Bristol, VT homeowners’ guide to generator installs

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

See all articles