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Verified Reviews for Generator Install pros in La Harpe, IL

*The Angi rating for Generator Install companies in La Harpe, 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 La Harpe, 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 October 12, 2026

Top-Rated Generator install pros in La Harpe - Updated Nov 2026

Avatar for Power Services Company, LLC
Power Services Company, LLC
5.0(
8
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving La Harpe, IL and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"They went above and beyond for a generator install"
Adams County Generator In
Bank Generator Install
Work Shop install - Iowa
Response time1 day
Recommended by100%of homeowners
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Avatar for MW Energy LLC
MW Energy LLC
5.0(
7
)
Generator - Install - For Business

Serving La Harpe, IL and surrounding areas

In business since 2022

Free estimates

Emergency services offered

"The most professional contractor Iâ ve ever worked with. Our home turned out perfect, and cost was very clear and reasonable from the start."
Panel Replacement
Before Panel Replacement
Response time7 hrs
Response rate89%
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 La Harpe, 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

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. 

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 amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

Yes, installing a generator usually increases your property value because buyers are getting the added peace of mind knowing they’ll be able to maintain power through blackouts. In most cases, you should see close to a 100% return on investment (ROI). Keep in mind that home generators usually need a permanent foundation, and installing a concrete slab will likely raise your property taxes slightly.

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

The La Harpe, 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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