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Avatar for NWI Generator Group LLC
NWI Generator Group LLC
4.9(
49
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Park Forest, IL and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"I hired NW Indiana generator about 4 years ago to install a 20k generac. They did a fantastic job. Guys were clean friendly and efficient. Also they have done annual service for me. Would recommend for sure."
Response time4 days
33 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for MPower Generators, Inc.
MPower Generators, Inc.
4.8(
25
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Repair - For Business

Serving Park Forest, IL and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Outstanding experience. On time, took the time to educate me on the required maintenance of my 3-year old generator. Also installed remote monitoring hardware and tested it for me. Will use again."
Powered by MPower Generators
Power outages are a thing of the past.
Gravel base
Gravel base needs to be compacted
Prefabricated cement pad

+8

Response time1 day
2 neighbors recently requested a quote
Recommended by95%of homeowners
CERTIFIED ELECTRIC LLC
5.0(
6
)
Fixed Generator - InstallPortable Generator - Install

Serving Park Forest, IL and surrounding areas

Approved

In business since 2019

Emergency services offered

Offers commercial services

Certified Electric is a licensed, bonded, and insured electrical contractor dedicated to providing safe, reliable, and high-quality electrical services.\n\nWe specialize in residential electrical work, including panel upgrades and EV charger installations.\n\nOur mission is to deliver honest service, expert craftsmanship, and lasting solutions while treating every customer’s home with the care and professionalism it deserves.\n\nLet’s Make It Happen. ⚡

My jobs
My jobs
My jobs
My jobs
My jobs

+2

Response time1 hour
Response rate89%
4 neighbors recently requested a quote
Widur Corporation
4.6(
16
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Park Forest, IL and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Wojtek was hired to install and rewire several ceiling fans, remodel the lighting in the kitchen and move two ceiling lights over dining tables. He worked very well with my wife in designing the kitchen lighting. Wojtek is very neat and leaves the house with no mess left behind. He is thorough and was on time for each of the three appointments. I had used him once before to wire and install an upstairs ceiling fan and was so impressed I only had him quote this job."
Recommended by93%of homeowners
Avatar for M.T. Kelley Electric LLC
M.T. Kelley Electric LLC
5.0(
4
)
Generator - Install - For Business

Serving Park Forest, IL and surrounding areas

Approved

In business since 1994

Warranties offered

Credit card accepted

"Hello, MTK electric was fantastic to deal with, their communication was top notch, they were very transparent about the entire process and the overall price was fair. Would definitely look for their assistance in the future."
Response time8 hrs
Response rate99%
2 neighbors recently requested a quote
Scardino Electric, Inc.
5.0(
3
)
Generator - Install - For BusinessGenerator - Repair - For Business

Serving Park Forest, IL and surrounding areas

Approved

In business since 1970

Free estimates

Credit card accepted

With over 50 years of business serving the Chicago metro area, Scardino Electric, Inc., is the way to go for all your wiring and panel upgrade needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to do excellent work on every visit, answer all questions, and develop lasting relationships with all our clients so, that the next time service is needed, there will be no question on who to call. Contact us today for a free estimate. Satisfaction Guaranteed!

Response time11 hrs
Response rate100%
Recommended by100%of homeowners
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Generator Install questions, answered by experts

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.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

While the rating will tell you how many watts the refrigerator needs at the peak of its cycle, it requires additional wattage to start. At the bare minimum, you’ll need a 1,500-watt generator to get the fridge up and running after a blackout. A 2,000-watt generator should be sufficient for most home refrigerators.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

Costs range from $500 to $2,500, depending on generator type and installation complexity.

The Park Forest, IL homeowners’ guide to generator installs

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