Top-rated generator install pros.

Get matched with top generator install pros in Maryville, IL

Enter your zip and get matched with up to 5 pros

Verified Reviews for Generator Install pros in Maryville, IL

*The Angi rating for Generator Install companies in Maryville, 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 Maryville, 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 02, 2025

Find Generator install pros in Maryville

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.

KING AIR CONDITIONING & HTG

5.00(
9
)

KING AIR CONDITIONING & HTG

5.00(
9
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

King Air Conditioning & Heating has been in business since 1974 and is a Bryant Factory Authorized Dealer and a GeoComfort geothermal dealer. We offer free estimates on new equipment and charge by the job not by the hour. King Air Conditioning & Heating is EPA & NATE certified. King Air also offers emergency repair service.

King Air Conditioning & Heating has been in business since 1974 and is a Bryant Factory Authorized Dealer and a GeoComfort geothermal dealer. We offer free estimates on new equipment and charge by the job not by the hour. King Air Conditioning & Heating is EPA & NATE certified. King Air also offers emergency repair service.

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

Whole-house generators can last 20 to 40 years with normal operation and proper maintenance. If you look up the specifications for your generator, you may be able to find a lifespan rated in hours of operation. Life expectancy will vary depending on how often and for how long you use the generator each year. Choosing a fuel with low impact like natural gas or diesel can help generators last as long as possible.

Homeowners can often access federal tax credits, such as the Investment Tax Credit (ITC), which covers a percentage of installation costs. Many states and utilities offer additional rebates, grants, or performance-based incentives. These programs can significantly lower your upfront investment. Check the Database of State Incentives for Renewables and Efficiency (DSIRE) or contact your local energy office for current offers.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

The typical cost of a home generator is around $5,000, but prices range from $400 up to $13,000, depending on a few factors. The most significant cost factor is the generator size, as larger generators that can support more square footage usually cost more. You can install an emergency backup generator for between $500 and $2,000 or a partial-home generator for between $2,000 and $6,500. Whole-home generators usually total between $5,000 and $13,000, with some models climbing as high as $18,000.

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

The Maryville, 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