Top-rated generator install pros.

Get matched with top generator install pros in Divernon, IL

Enter your ZIP and get matched with up to 5 pros

Verified Reviews for Generator Install pros in Divernon, IL

*The Angi rating for Generator Install companies in Divernon, IL 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 Divernon, IL 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 October 25, 2025

Find Generator install pros in Divernon

Avatar for Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

1902 Vandalia Street, Suite 100
3.80(
80
)
•Approved Pro

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

1902 Vandalia Street, Suite 100
3.80(
80
)
•Approved Pro
Customers say: Quick response
199 local quotes requested
32 years of experience

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services takes pride in being your preferred local plumbers, electricians, and HVAC technicians! In fact, more homeowners in the St. Louis Metro East & Central Illinois communities we serve, say they would call us again before any other plumbing, electrical, heating, or air conditioning service!

"This company is outstanding. I can not sing them enough praises."

Jacqueline W on May 2025

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services takes pride in being your preferred local plumbers, electricians, and HVAC technicians! In fact, more homeowners in the St. Louis Metro East & Central Illinois communities we serve, say they would call us again before any other plumbing, electrical, heating, or air conditioning service!

"This company is outstanding. I can not sing them enough praises."

Jacqueline W on May 2025

Avatar for Accent Tel USA

Accent Tel USA

3501 Bessie Coleman Blvd, Suite 25203
4.89(
9
)
•Approved Pro

Accent Tel USA

3501 Bessie Coleman Blvd, Suite 25203
4.89(
9
)
•Approved Pro
Customers say: Quick response
16 years of experience
Free onsite estimate

Our Company provides a one-stop solution for all of your voice, internet, and telecom needs. Leveraging the Cloud we provide your Office state-of-the-art telephones for little or no upfront cost striving to keep your monthly costs the same. Sound too good to be true? Give us a call and we will show you how.

"Telephone System - Install or Upgrade - For Business "

Anthony O on September 2025

Our Company provides a one-stop solution for all of your voice, internet, and telecom needs. Leveraging the Cloud we provide your Office state-of-the-art telephones for little or no upfront cost striving to keep your monthly costs the same. Sound too good to be true? Give us a call and we will show you how.

"Telephone System - Install or Upgrade - For Business "

Anthony O on September 2025

McWhorter Construction

218 North 6th
2.00(
1
)

McWhorter Construction

218 North 6th
2.00(
1
)
29 years of experience

We are a full service construction company, serving central Illinois, roofing, new homes, steel structures, concrete, windows Replacement windows, roofing, concrete, new homes, remodeling, bathroom, concrete, flooring, steel structures, agricultural buildings, siding, drywall ,garage packages, foundations, commercial buildings

We are a full service construction company, serving central Illinois, roofing, new homes, steel structures, concrete, windows Replacement windows, roofing, concrete, new homes, remodeling, bathroom, concrete, flooring, steel structures, agricultural buildings, siding, drywall ,garage packages, foundations, commercial buildings

Knox Knolls Outdoor Power Service

2134 W Lawrence Ave
No reviews yet

Knox Knolls Outdoor Power Service

2134 W Lawrence Ave
No reviews yet
13 years of experience

Providing warranty and preventive maintenance services for Kohler engines, and Generac power washers and generators. Our specialty is generators, power washers, and pumps. We carry a full line of portable generators and power washers from Generac. We also provide accessories for Generac equipment including manual transfer switches and load centers. Our sales department can also provide sales of Kohler engines, a wide variety of pumps including trash, high pressure water pumps, and diaphragm pumps, and a full line of equipment and products used by homeowners, farmers, and other businesses.

Providing warranty and preventive maintenance services for Kohler engines, and Generac power washers and generators. Our specialty is generators, power washers, and pumps. We carry a full line of portable generators and power washers from Generac. We also provide accessories for Generac equipment including manual transfer switches and load centers. Our sales department can also provide sales of Kohler engines, a wide variety of pumps including trash, high pressure water pumps, and diaphragm pumps, and a full line of equipment and products used by homeowners, farmers, and other businesses.

My Classic Car Trader LLC

312 Prospect Ave
2.00(
1
)

My Classic Car Trader LLC

312 Prospect Ave
2.00(
1
)
53 years of experience

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Generator Install questions, answered by experts

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.

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. 

The cost to install a whole-house generator averages at $5,200, but costs can range from $1,500 to $8,900, depending on the type and size of the generator, and the labor required to install it. To find the best deal while still ensuring the unit meets all the needs of your household, hire an electrician to calculate the electrical load of your must-have appliances and electronics beforehand so you don’t pay for more power than you need. As always, be sure to get at least three quotes to find the ideal fit for your needs and budget.

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.

When choosing the right size generator for your needs, consider a few items to help calculate the wattage you’ll need. Start by determining which household items and appliances you want to power, and then add the wattages together. Check out the wattage of these essential appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 watts

Running home appliances like these requires a partial or whole-house generator. A portable generator may be enough to power your home if you only plan to keep a refrigerator and freezer running. 

The Divernon, IL 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

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"