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Best generator install pros near Monmouth, IL

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Verified Reviews for Generator Install pros in Monmouth, IL

*The Angi rating for Generator Install companies in Monmouth, 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 Monmouth, 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 August 19, 2026

Top-Rated Generator install pros in Monmouth - 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 Monmouth, 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.

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+3

17 neighbors recently requested a quote
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Avatar for Power Services Company, LLC
Power Services Company, LLC
5.0(
8
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Monmouth, IL and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"Very professional, the best generator company I have worked with."
Adams County Generator In
Bank Generator Install
Work Shop install - Iowa
Response time1 day
Recommended by100%of homeowners
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Freedom Electrical LLC
5.0(
3
)
Portable Generator - Repair

Serving Monmouth, IL and surrounding areas

In business since 2024

Credit card accepted

"I needed security cameras installed, and I am so glad I ran across Mitchell through Angi. I canâ t say enough good things about this guy! He was on time and communicated well in person and through text. He was fast, efficient, thorough, honest, hardworking, and just an overall decent guy. Once again, my wife and I are so glad that we ran across Mitchell at Freedom Electrical, and we are looking forward to working with him on future projects!"
New install
Upgraded panel
Before
Typical replacement
Response time5 hrs
Recommended by100%of homeowners
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Avatar for Mangieri Electric
Mangieri Electric
New to Angi
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Monmouth, IL and surrounding areas

Free estimates

Emergency services offered

Warranties offered

Mangieri Electric is a trusted, locally owned electrical contractor serving residential, commercial, and industrial clients. We specialize in new construction, remodels, service upgrades, backup generator installations, low-voltage systems, and preventative maintenance. Our licensed electricians are known for quality workmanship, honest communication, and completing jobs on time and on budget. Whether you need troubleshooting, a full electrical system, or a custom solution, we’re committed to powering your home or business safely and efficiently. We're proud members of ABC and hold to the highest standards of professionalism and safety.

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Generator Install FAQs, answered by experts

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home’s needs. Accurate output estimates require a professional wind assessment and a review of your household’s energy usage patterns.

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

Natural gas generators are designed to run for extended periods of time, such as power outages during a natural disaster. Since there’s no limit to the supply of natural gas, they don’t need to stop for refills. However, generators do need maintenance, including pauses to check and add oil. Constantly running them will also cause a lot more wear and tear, leading to a shorter lifespan.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

The Monmouth, 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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