The answer to 'how much does generator cost in Illinois' is that the cost of a generator can vary widely depending on several factors. Typical standby generator prices in Illinois can range from $3,000 to $15,000 or more, with portable generators costing $500 to $3,000 on average. The size, fuel type, and features of the generator are the main drivers of the cost.
Larger, whole-home standby generators with more wattage and automatic transfer switches will be on the higher end of the range, while smaller portable units designed for occasional use will be on the lower end. Fuel type also affects pricing, with natural gas and propane generators generally costing more than gasoline-powered models. Additional factors like installation complexity, brand, and any local or federal incentives can also influence the final cost.