Top-rated generator install pros.

Get matched with top generator install pros in Marion, IL

Enter your zip and get matched with up to 5 pros

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

Select your specific project to find the pro for you.

Find Generator install pros in Marion

Avatar for Holtzclaw Electric
Holtzclaw Electric
4.6(
10
)
Fixed Generator - InstallGenerator - Install - For BusinessGenerator - Repair - For Business+1 more

Serving Marion, IL and surrounding areas

Approved

In business since 2009

Credit card accepted

Offers commercial services

"Call this electrician! He s worth your call, don t wait for him to call you! He was fair, honest and went above and beyond our expectations. We got two other quotes, one being from another company (Service detectives) who charged us $89 for a QUOTE and then quoted us $19k for everything we wanted done. For the things we needed done (not the whole house but a new meter outside, wiring to the inside, new panel and several outlets rewired) Holtzclaw Electric did for 3 times less than S.D. Just call Brandon. You won t regret it."
Response time2 hrs
Recommended by90%of homeowners
Avatar for Inventors Imaginarium
Inventors Imaginarium
New to Angi
Portable Generator - Repair

Serving Marion, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

We take pride in delivering dependable, high-quality craftsmanship with honest communication from start to finish. Whether you're planning a small repair or a larger renovation, our goal is to provide durable, professional results that improve the value, function, and appearance of your property.\n\nOur services include residential construction, remodeling, repairs, renovations, demolition, framing, drywall, flooring, painting, trim and finish carpentry, deck and porch work, fencing, siding, roofing repairs, door and window installation, and general handyman services. We also handle property improvements, rental property maintenance, and custom projects tailored to your needs.\n\nEvery project is completed with attention to detail, quality materials, and a commitment to doing the job right the first time. We believe in treating every home as if it were our own by maintaining a clean worksite, respecting your property, and keeping you informed throughout the project. \n\nChoose us today!

4 neighbors recently requested a quote
Avatar for Hope Electric
Hope Electric
4.8(
9
)
Portable Generator - Install

Serving Marion, IL and surrounding areas

In business since 2019

Free estimates

Offers commercial services

"My panel was maxed out with several double taps. I wanted to upgrade as necessary so it would pass inspection before putting my house on the market. A few options were given, with pros and cons of each, and explained as needed. Once a decision was made a contract was signed and the work scheduled. The owner kept in contact with me from beginning to end, even when he needed to reschedule due to unforeseen circumstances. The work was performed efficiently, neatly, and for slightly less than the bid amount."
Response time1 day
Response rate99%
Recommended by100%of homeowners
Fitzgerald Electrical Services -
New to Angi
Generator - Install - For BusinessGenerator - Repair - For Business

Serving Marion, IL and surrounding areas

In business since 2009

Free estimates

Emergency services offered

Fitzgerald Electrical Services is an obvious choice for all your electrical needs. We have the power to perform and can handle any job from computer networking to electrical wiring and panel upgrades for a remodel or addition. We are experts in the installation of in-ground pools and can also assist with repair work associated with your swimming pool and the accessories and equipment. Free Estimates within 30 min drive We proudly obtain a Cape Gerardo License #852, expires March/2014. Outdoor lighting, home theater systems, telephone jacks, surveillance systems, etc..."If There is Wire to It...We Do It".

Kohler Emergency Generators and Transfer Switches
 Undergound Electrical Conduits/ Electrical Room
High Voltage Transformer
 Landscape Lighting Design and Installation
 Data Center Lighting

+15

Showing 1-10 of 11
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.

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

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.

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.

The Marion, IL homeowners’ guide to generator installs

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