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    Average homeowner rating
  • Verified reviews icon17
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Verified Reviews for Generator Install pros in Grayslake, IL

*The Angi rating for Generator Install companies in Grayslake, 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 Grayslake, 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 June 16, 2025

Top-Rated Generator install pros in Grayslake - Updated Nov 2026

Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
5.0(
5
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Grayslake, 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
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+3

21 neighbors recently requested a quote
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Avatar for Precision Today Plumbing Heating Cooling Electrical
Precision Today Plumbing Heating Cooling Electrical
4.6(
329
)
Fixed Generator - InstallFixed Generator - Repair

Serving Grayslake, IL and surrounding areas

Approved (Corporate)

In business since 1992

Emergency services offered

Warranties offered

"Installer was knowledgeable explained the installation process and different cost/warranty prices. Clean and efficient."
Pipe Coating
Pictures
Pictures
Pictures
Pictures

+13

Response time10 hrs
Response rate100%
30 neighbors recently requested a quote
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Avatar for AGI Lab, Inc.
AGI Lab, Inc.
5.0(
24
)
Fixed Generator - Install

Serving Grayslake, IL and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"Anton is a professional. He is skilled, quick and arrive on time. He is the best electrician I have worked with. You can t go wrong with hiring him."
Kitchen and living room
Kitchen
Old electrical panel
New elecrical panel
New electrical panel Siemens

+7

Response time9 hrs
Recommended by100%of homeowners
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Avatar for Your IT Guy
Your IT Guy
4.7(
47
)
Portable Generator - Install

Serving Grayslake, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Warranties offered

"Chuck was great, not only installed a microwave outlet but also the microwave itself. Very satisfied with his work. Will definitely call again or recommend."
Response time6 hrs
8 neighbors recently requested a quote
Recommended by78%of homeowners
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Avatar for Imperial electric
Imperial electric
4.8(
19
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install

Serving Grayslake, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"The service guy came out very quickly. Had a smart thermostat installed. He walked me through setting up the app. Did a fast and a great job. I highly recommend this company if you want it done and done right."
15 neighbors recently requested a quote
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Avatar for Four Seasons Heating & Air Conditioning
Four Seasons Heating & Air Conditioning
4.3(
3,298
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Grayslake, IL and surrounding areas

Approved (Corporate)

In business since 1971

Free estimates

Emergency services offered

"Four Season service was awesome. The installers were friendly, professional, and knowledgeable. The installers cleaned up work area after they finished the job."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
44 neighbors recently requested a quote
Recommended by86%of homeowners
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Avatar for Toptec Heating, Cooling, Plumbing & Electrical, Inc.
Toptec Heating, Cooling, Plumbing & Electrical, Inc.
4.4(
614
)
Fixed Generator - InstallFixed Generator - Repair

Serving Grayslake, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Free estimates

Emergency services offered

"I used Toptec to install my furnace. They did a great job from start to finish. Adam was very knowledgeable and business oriented."
Duct Cleaning Before/After
Additional Photos
Additional Photos
Barrington Geothermal Lake Heat Exchangers
Barrington Geothermal - WaterFurnace Geothermal Heating/Cooling Systems with Desuperheaters

+48

Response time1 day
Response rate100%
10 neighbors recently requested a quote
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Scardino Electric, Inc.
5.0(
3
)
Generator - Install - For BusinessGenerator - Repair - For Business

Serving Grayslake, IL and surrounding areas

Approved

In business since 1970

Free estimates

Credit card accepted

With over 50 years of business serving the Chicago metro area, Scardino Electric, Inc., is the way to go for all your wiring and panel upgrade needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to do excellent work on every visit, answer all questions, and develop lasting relationships with all our clients so, that the next time service is needed, there will be no question on who to call. Contact us today for a free estimate. Satisfaction Guaranteed!

Response time11 hrs
Response rate100%
Recommended by100%of homeowners
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Avatar for Ls industrial repair
Ls industrial repair
5.0(
2
)
Portable Generator - Repair

Serving Grayslake, IL and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

At LSI repair we offer only the best and fair prices. We also specialize in heat treating furnaces but we cover a large array of services from residential to commercial from small to big.

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Generator Install FAQs, answered by experts

While natural gas generators are costly, they’re a great option for standby power due to the reliability of natural gas as a fuel source. Unlike other fuels, natural gas is delivered through underground pipes, making outages extremely rare and less likely to be affected by the elements. As long as the area isn’t prone to earthquakes, they offer an unlimited supply of natural gas that doesn’t degrade over time or require storage in tanks.

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. 

Carbon monoxide emissions aren’t only dangerous to human life, but they also harm our planet. While natural gas generators emit lower levels of CO than other fuel sources, there are still ways to reduce emission levels. For example, shop around for an eco-friendly generator that complies with current emission standards. Also, make sure your generator is serviced regularly to avoid CO buildup. 

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.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

The Grayslake, 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