Solar Panel Cost in Illinois
Average costs, savings estimates, and incentives for Illinois homeowners — plus free installer quotes.
Solar in Illinois: Overview
Illinois homeowners who go solar can expect to pay around $26,000 for a typical 8.7 kW system before incentives. Note: the 30% federal residential solar tax credit expired December 31, 2025. State and local incentives may still reduce your net cost.
With average annual electricity savings of $1,400, the typical payback period in Illinois is 13 years. Over 25 years, that represents a return on investment of approximately $16,800.
Illinois's sun score of 62/100 reflects the region's solar irradiance. The state also offers Illinois Shines SREC, which can further reduce your upfront costs.
Solar Incentives in Illinois
Expired December 31, 2025 — no longer available for new residential installs
State-specific program for Illinois residents
Many states exempt solar from property tax assessments
Sell excess power back to the grid at retail rates
Frequently Asked Questions — Solar in Illinois
How much do solar panels cost in Illinois?
The average solar installation in Illinois costs approximately $26,000 before incentives. Note: the 30% federal residential solar tax credit expired December 31, 2025. State and local incentives may still apply in your area. Prices vary by system size, installer, and equipment quality.
How much can I save with solar in Illinois?
Illinois homeowners save an average of $1,400 per year on electricity with solar. Over 25 years, that's a potential return of $16,800 after accounting for your net system cost.
What solar incentives are available in Illinois?
Illinois offers Illinois Shines SREC. Note: the federal 30% residential ITC expired December 31, 2025. Check with your utility company for additional rebates and state programs.
How long is the solar payback period in Illinois?
Based on average costs and savings, the typical payback period in Illinois is approximately 13 years. After payback, your solar panels continue generating free electricity for 15–20+ more years.
Is solar worth it in Illinois?
With a sun score of 62/100 and average annual savings of $1,400, solar is a good investment in Illinois. The Illinois Shines SREC further improves the economics.