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Verified Reviews for Generator Install pros in Forrest, IL

*The Angi rating for Generator Install companies in Forrest, 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 Forrest, 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 December 08, 2025

Find Generator install pros in Forrest

Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
5.0(
5
)

Serving Forrest, IL and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

We are the experts in the field of Whole Home Generator Sales and Installation, with over 20 years of experience in the game.\nWe provide turn-key installation by licensed professionals - 24 hour emergency service - Remote Monitoring - Long term maintenance and service by factory trained technicians.

Additional Photos
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+3

39 neighbors recently requested a quote
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Avatar for Julio Marroquin
Julio Marroquin
5.0(
12
)

Serving Forrest, IL and surrounding areas

Approved

In business since 2017

Free estimates

Small jobs welcome

"Found Julio through a friend had a couple estimates done before hand but was either overestimated or no shows Julio came out the same week and finished before the expected time. Top guy for sure he carries his quality in his work. 10/10 highly recommend"
Response time1 hour
Response rate100%
1 neighbors recently requested a quote
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Avatar for Mid America Lightning Protection
Mid America Lightning Protection
4.5(
99
)

Serving Forrest, IL and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"Responsive, fair pricing. Quality of installation could have been done a little better as rods were slightly crooked and they did not pull the wiring tout on top of house so not totally parallel to roof line."
Indianapolis
Trucking company
Indianapolis
Indiana Illinois
Indiana Illinois

+70

Response time6 hrs
Response rate94%
3 neighbors recently requested a quote
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Swinderman Engineering Services
4.1(
38
)

Serving Forrest, IL and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"These installers will do a great job with the actually installation. In my case, I wanted to install my antenna's in the attic. After the installation, vhs (particularly PBS) signal did not come in. I followed up to see if an adjustment could be made to try to get pbs. The correspondence got into a couple of minor issues that we disagreed about, but the main point was that i couldn't get pbs. They offered to come install the antenna outside, which i turned down. I called PBS and gave them the antenna model installed. They told me that the problem was likely that the model was designed for UHF. I googled Antenna's Direct and talked to their tech support. They confirmed that the antenna I had was likely the issue with VHF but would be very good for UHF. They suggest that I add a VHF only antenna and a UHF/VHF combiner. They looked up my address and told me exactly where to place the VHF antenna. It took me an hour or so to set up the VHF antenna, run the cable and hook up the combiner. They also directed me to Amazon where I could buy the antenna and combiner I needed. IT WORKED GREAT! All the UHF & VHF channels I need and more. Bottom line is that this company is great on installation. The installer did a very good job and they adjusted my bill for a travel time question. However, they didn't know about the UHF/VHF issue that Antenna's Direct knew about immediately. I would recommend talking to tech support at Antenna's Direct before any installation to ensure the antennas are correct and follow up with Antenna's Direct before deciding on any adjustments or moving the antennas from your preferred location."
Recommended by100%of homeowners
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Avatar for Edelman Cooling, Plumbing, Electric & Solar
Edelman Cooling, Plumbing, Electric & Solar
5.0(
5
)

Serving Forrest, IL and surrounding areas

Approved (Corporate)

In business since 2003

Free estimates

Emergency services offered

Here at Edelman, we’re your trusted local team for HVAC heating & cooling services around northern Illinois. We provide residential repair, replacement, installation, and maintenance.\n\nEdelman is built on 23 years of experience, a strong work ethic, and a commitment to delivering the best service to every client and customer. We stand behind our work with a 100% Satisfaction Guarantee on all service, repairs, and replacements.

Edelman
Mini Split
Mini Split
Mini Split
Mini Split

+5

44 neighbors recently requested a quote
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Generator Install questions, answered by experts

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

Yes, in most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home models. Because these installations involve significant alterations to your home's electrical system and produce exhaust fumes, local governments often require a permit or inspection for safety purposes. A generator permit typically costs between $50 and $250, depending on your location. Your electrician or certified installer can usually handle the permitting process for you, but you will be responsible for the cost. It's a good practice to confirm with your installer that they will pull all necessary permits before work begins.

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 Forrest, IL homeowners’ guide to generator installs

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

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