Top-rated generator install pros.

Get matched with top generator install pros in Norridge, IL

Enter your zip and get matched with up to 5 pros

Need a pro for your generator install project in Norridge, IL?

Select your specific project to find the pro for you.

Find Generator install pros in Norridge

Avatar for Onix Electric Services LLC
Onix Electric Services LLC
5.0(
12
)
Fixed Generator - RepairPortable Generator - InstallPortable Generator - Repair

Serving Norridge, IL and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at Onix Electric Service LLC strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.

Response time12 hrs
Response rate95%
7 neighbors recently requested a quote
Avatar for Expert Electric, LLC
Expert Electric, LLC
5.0(
15
)
Portable Generator - Install

Serving Norridge, IL and surrounding areas

Approved

In business since 2020

Emergency services offered

Warranties offered

"Anthony was professional, pleasant and picked up after finishing the installation, I will recommend him to anyone who asks for an excellent electrician! He is amazing and finished the job quickly! 5 Stars!!!"
Kitchen remodel
Kitchen remodel
Kitchen remodel
Ev charger installation
Panel replacement

+3

Response time9 hrs
Response rate100%
Recommended by80%of homeowners
RK Electric HVACR Contractor
5.0(
4
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Norridge, IL and surrounding areas

Approved

In business since 1986

Warranties offered

Credit card accepted

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical and HVAC projects to include full installation for additions and remodels as well as generator installs, wiring and panel upgrades, and a variety of other jobs. We take pride in our quality of work and our commitment to outstanding results. We're committed to providing a personalized service for each individual project we take on. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

Response time12 hrs
Recommended by100%of homeowners
Avatar for M.T. Kelley Electric LLC
M.T. Kelley Electric LLC
5.0(
4
)
Generator - Install - For Business

Serving Norridge, IL and surrounding areas

Approved

In business since 1994

Warranties offered

Credit card accepted

M.T. Kelley Electric LLC\nis a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

Response time8 hrs
Response rate99%
1 neighbors recently requested a quote
Avatar for Mister Sparky of South Chicagoland
Mister Sparky of South Chicagoland
5.0(
5
)
Fixed Generator - Install

Serving Norridge, IL and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Mister Sparky of South Chicagoland proudly serves homeowners throughout the City of Chicago and the surrounding south suburbs. Our team is committed to providing safe, reliable electrical service with exceptional professionalism and attention to detail. Whether you need a quick repair, panel upgrade, lighting installation, or a larger project, we stand behind our work with a customer satisfaction guarantee. For added convenience, financing options are available for qualifying projects. Contact us today — we look forward to earning your business.

2 neighbors recently requested a quote
...
Showing 1-10 of 136
Generator Install questions, 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. 

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

The Norridge, IL homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.