How much do solar panels cost in Mercer County, IL in 2025?
Going solar in Mercer County, IL averages out to $4.05 per watt in February, 2025.
You should expect costs to be $4,050, on average, for every 1 kW (or 1000 watts) of solar energy your solar system will need to produce. We are able to come to this conclusion as a result of the rate price cost per watt above. In Mercer County, you will pay approximately $14,175 for a 5 kW panel install after subtracting the 30% federal income tax credit. Remember, a bigger system might be required to fulfill your energy requirements effectively.
By selecting your county on the left, you can view the average roof size and the average maximum capacity for residential solar panel systems in your area. See below a full overview of the {price|costs, payback period, and 20-year average savings for a 5 kW system in your county.