Solar Panel Cost in
Illinois

Updated 10/24/2020

How much do solar panels cost in Illinois in 2020?

As of October 2020, the average solar panel cost in Illinois is $3.09/W. Given a solar panel system size of 5 kilowatts (kW), an average solar installation in Illinois ranges in cost from $13,132 to $17,768, with the average gross price for solar in Illinois coming in at $15,450. After accounting for the 26% Federal Investment Tax Credit (ITC) and other state and local solar incentives, the net price you'll pay for solar can fall by thousands of dollars.

Importantly, these costs are typical for solar shoppers comparing solar quotes on the EnergySage Marketplace. When you compare quotes for solar panels on EnergySage's competitive solar marketplace, you can expect to see prices up to 20% lower than working with a single solar company.

Average solar panel cost by system size in Illinois

System Size System Cost System Cost (after ITC)
3 kW $9,270 $6,860
4 kW $12,360 $9,146
5 kW $15,450 $11,433
6 kW $18,540 $13,720
7 kW $21,630 $16,006
8 kW $24,720 $18,293
9 kW $27,810 $20,579
10 kW $30,900 $22,866

2020 average solar panel cost graph in Illinois

for a 5kW system

Great Price
$13,132 or less
Market Average
$15,450
Above Market
$17,768 or more

Solar installation costs do not include the 26% Federal Investment Tax Credit or local incentives. Learn more about local IL incentives, tax credits & rebates.

Payback Period

9.06 Years

20-Year Savings

$21,078

Cost per Watt

$3.09

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Top solar installers in Illinois

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True Cost of Solar Guide™ for Illinois

Download EnergySage’s DIY worksheet to better understand what solar should cost in your state

Don’t get sold on the hype! Find out what solar should actually cost before you talk to your first sales rep. This PDF worksheet will walk you through the simple calculations you can make to determine what size solar PV system you need, and approximately how much it should cost.