The answer to 'cost to install generator installation in Illinois' is that the cost can vary widely depending on several factors. Typical ranges for a whole-home generator installation in Illinois can be anywhere from $5,000 to $15,000 or more, depending on the size of the generator, the complexity of the installation, and the specific needs of your home.
Some of the key factors that can influence the cost include the generator size and power output, the accessibility of the installation site, any necessary electrical panel upgrades, and any additional permits or inspections required by your local jurisdiction. It's also important to consider ongoing maintenance and fuel costs for the generator.