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Verified Reviews for Generator Install pros in Gillespie, IL

*The Angi rating for Generator Install companies in Gillespie, 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 Gillespie, 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 April 14, 2026

Find Generator install pros in Gillespie

Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
4.8(
37
)

Serving Gillespie, IL and surrounding areas

Approved

In business since 1993

Free estimates

Emergency services offered

"Kelly installed a new toilet for us. He did a superb job and he deserves a raise. He has such a great attitude. He is a keeper & again, he deserves a raise!! And I am not his mother or grandmother."
My jobs
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My jobs
My jobs

+3

50 neighbors recently requested a quote
Recommended by97%of homeowners
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Miller Home Improvement
4.4(
15
)

Serving Gillespie, IL and surrounding areas

In business since 1993

Free estimates

"We are very happy with the work that Miller Home Improvement did on refacing our kitchen cabinetsThey did an awesome job on everything even right down to the littlest details...they were very neat and clean...and always very nice and friendly!!! The quality of these new drawers and doors are made very nice!! We will for sure use them again for any type of contracting work we need done and we will be referring them to others!!! Thanks to Miller Home Improvement we have a beautiful new kitchen and we couldn't be happier!!!
"
Recommended by91%of homeowners
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Avatar for Tiger Services, LLC
Tiger Services, LLC
3.3(
249
)

Serving Gillespie, IL and surrounding areas

In business since 1993

Emergency services offered

Warranties offered

"both certified plumbers were GREAT today...glad things were fixed under my manufactured home,,,puts me more at ease....different Tiger guys will be here on Thursday to fix something else under ,y home....ALWAYS like the way the Tiger guys do their work. Chyrel W"
November 2020 Project
Does Your Crawlspace Look Like This?
Without Spray Foam Barrier
With Spray Foam Barrier
Without Tiger Signature Drainage Matting

+27

Response time1 day
Recommended by79%of homeowners
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Avatar for MorMat Electrical & Construction Services LLC
MorMat Electrical & Construction Services LLC
5.0(
2
)

Serving Gillespie, IL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"The team from Mormat were quick to setup and get started on the job.  It was a cold day to be replacing the door so I was happy to see that they took the time to get as much of the prep work ready as they could before they began to take the existing door down.  Once they got started they let us know what they would be doing, and they began the tear down.  There was a lot of rotting wood around the old frame, and the walls were a mixture of the dry wall and weather worn cinder blocks.  Everything was a mess, but kept the debris to a minimum which was great since we had to pass by the area several times while they worked to do chores while they worked.  Overall the finished install was amazing for the door and I'm pretty sure it's the sturdiest structure in the house.
The electrical panel in my home was outdated and needed to be replaced as well which they assisted with.  When we moved in we found that not only did the panel need to be replaced but we weren't quite sure what breaker went where.  The team from Mormat took the time to not only replace the panel, but also to make sure I knew where everything went.  I now have a clearly labeled panel, which makes things so much easier whenever I need to do work that I feel comfortable doing, safely.
I have had the experience to use their services for the company I work for, and it was great to see that the professionalism and detail they bring to an office space they also offer to their residential jobs.  Given the broad range of skills I have seen their team employ, there will be no doubt that I will continue to use their services for any of my major projects in my new home."
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Recommended by100%of homeowners
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Generator Install questions, answered by experts

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

The Gillespie, 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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