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Verified Reviews for Generator Install pros in Collinsville, IL

*The Angi rating for Generator Install companies in Collinsville, 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 Collinsville, 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 01, 2025

Find Generator install pros in Collinsville

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

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

3.80(
80
)
•Approved Pro

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

3.80(
80
)
•Approved Pro
Customers say: Quick response
1993 years of experience
Free onsite estimate

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

Trinity Heating, Cooling, & Refrigeration LLC

4.55(
381
)

Trinity Heating, Cooling, & Refrigeration LLC

4.55(
381
)
Customers say: True professional
2010 years of experience

Please contact us by phone : 314-780-2118 - Thanks ! Trinity Heating, Cooling, and Refrigeration is a full service mechanical contractor with over 20 years of experience in the industry. Ask how you can get a utility cash rebate and a federal tax credit with upgrading you heating and cooling system to a more efficient one.

"Excellent! The job was done very well"

Scott B on December 2020

Please contact us by phone : 314-780-2118 - Thanks ! Trinity Heating, Cooling, and Refrigeration is a full service mechanical contractor with over 20 years of experience in the industry. Ask how you can get a utility cash rebate and a federal tax credit with upgrading you heating and cooling system to a more efficient one.

"Excellent! The job was done very well"

Scott B on December 2020

Grasser Electric

4.85(
26
)

Grasser Electric

4.85(
26
)
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

GRASSER ELECTRIC is a premier electrical contractor servicing both commercial and residential customers in the St. Louis, St. Charles County and surrounding areas since 1975. We have diversified service and installation capabilities and we offer service during our normal business hours as well as emergency service. Our friendly and well-trained staff have many years of experience and will treat your home as if it were their own. We believe in following through with all our customers until your satisfaction is assured.

GRASSER ELECTRIC is a premier electrical contractor servicing both commercial and residential customers in the St. Louis, St. Charles County and surrounding areas since 1975. We have diversified service and installation capabilities and we offer service during our normal business hours as well as emergency service. Our friendly and well-trained staff have many years of experience and will treat your home as if it were their own. We believe in following through with all our customers until your satisfaction is assured.

Oller Electric

5.00(
4
)

Oller Electric

5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Oller Electric serves the Springfield and surrounding areas for all it's electrical needs. We service residential and commercial. We provide: Installation Service Standby Generator Installation Residential Electrical Projects You can count on as and we offer you the reassurance of being licensed, insured, and bonded. Call today to tell us about your projects to let us see what we can do for you and consult you throughout the process. Call Oller Electric where we get to know your project to give you what you want.

Oller Electric serves the Springfield and surrounding areas for all it's electrical needs. We service residential and commercial. We provide: Installation Service Standby Generator Installation Residential Electrical Projects You can count on as and we offer you the reassurance of being licensed, insured, and bonded. Call today to tell us about your projects to let us see what we can do for you and consult you throughout the process. Call Oller Electric where we get to know your project to give you what you want.

C & K Heating and Cooling, Inc.

5.00(
6
)

C & K Heating and Cooling, Inc.

5.00(
6
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

C &K is a family owned full service heating, cooling and plumbing company. We specialize in commercial, residential, refrigeration and plumbing. We offer very competitive pricing for all projects big or small. Financing is available.

C &K is a family owned full service heating, cooling and plumbing company. We specialize in commercial, residential, refrigeration and plumbing. We offer very competitive pricing for all projects big or small. Financing is available.

Avatar for EFS Energy

EFS Energy

5.00(
2
)

EFS Energy

5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

As the premier solar and energy efficiency professionals in St. Louis and the Midwest, EFS Energy strives to help our customers achieve energy independence by reducing use and generating clean, renewable energy. Specializing in commercial and agricultural solar power installations, our team has the experience and skill to design and install a custom system based on each individual customer’s needs.

As the premier solar and energy efficiency professionals in St. Louis and the Midwest, EFS Energy strives to help our customers achieve energy independence by reducing use and generating clean, renewable energy. Specializing in commercial and agricultural solar power installations, our team has the experience and skill to design and install a custom system based on each individual customer’s needs.

Avatar for Restoration Connection Inc.

Restoration Connection Inc.

4.67(
3
)

Restoration Connection Inc.

4.67(
3
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Getting the help you need when you need it is easy when you work with Restoration Connection, Inc.. We offer 24/7 emergency restoration services so you can literally call us any time of the day or night to get restoration help of any kind. We offer this kind of service because we know it is chiefly important to treat fire and water damage as soon as possible. That’s why we offer water cleanup in Marion, IL that is speedy and mold remediation services that don’t spare any detail. Here at Restoration Connection, Inc., we want you to know that you and your property are in good hands. You can contact us over the phone or fill out our contact form to schedule an estimate, get references or to talk to a restoration expert. Call (618) 925-0085 today!

"Terrific and the communication was good. The pricing was very flexible and reasonable. I trust their judgement."

linda s on August 2019

Getting the help you need when you need it is easy when you work with Restoration Connection, Inc.. We offer 24/7 emergency restoration services so you can literally call us any time of the day or night to get restoration help of any kind. We offer this kind of service because we know it is chiefly important to treat fire and water damage as soon as possible. That’s why we offer water cleanup in Marion, IL that is speedy and mold remediation services that don’t spare any detail. Here at Restoration Connection, Inc., we want you to know that you and your property are in good hands. You can contact us over the phone or fill out our contact form to schedule an estimate, get references or to talk to a restoration expert. Call (618) 925-0085 today!

"Terrific and the communication was good. The pricing was very flexible and reasonable. I trust their judgement."

linda s on August 2019

Showing 1-10 of 23
Generator Install questions, answered by experts

Many services include assembling the unit and securing it in the window. Confirm with your provider.

If you’re wondering whether gas generators produce carbon monoxide, know that natural gas generators do not produce carbon monoxide if they are functioning properly, as natural gas burns cleanly. However, if the generator malfunctions and the gas does not burn completely, there is potential for carbon dioxide to be produced. To prevent malfunctions, it's crucial to perform regular maintenance, including running the generator weekly and scheduling professional inspections every 6 to 12 months. Also, be sure to test your carbon monoxide detectors regularly to ensure they function in the rare case of the generator producing carbon monoxide.

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. 

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.

In many cases, you’ll need a permit or basic inspection to install one of these large generators. Since they include significant alterations to your home electrical system and many produce exhaust fumes, local governments often require jumping through a few hoops for general safety purposes. Your installer may be able to help you with these permits.

The Collinsville, 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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