Illinois Solar Guide is an independent guide for Illinois homeowners — we’re not an installer. We publish what solar actually costs in Illinois, what the incentives really pay in 2026, and how to compare quotes without the pressure. When you’re ready, one short form gets you quotes from vetted Illinois installers.
What Solar Costs in Illinois Right Now
Most Illinois homes install 8–12 kW. Before incentives, expect roughly $2.60–$3.40 per watt installed — about $21,000–$34,000 for a typical system, depending on your roof, equipment, and whether you add a battery.
The 2026 Rule Change Everyone Misses
The 30% federal tax credit for homeowner-owned solar ended for systems placed in service after December 31, 2025. If an installer is still quoting it on a 2026 purchase, get everything in writing — and read our incentives page before you sign.
What Illinois Still Pays You
Illinois Shines pays you for the solar credits (SRECs) your system generates — often several thousand dollars over the contract. ComEd and Ameren offer a per-kilowatt Distributed Generation rebate, and since 2025 excess power you send back is credited at the supply rate, which makes right-sizing your system matter more than ever.
How It Works
- Tell us about your home and electric bill.
- Compare quotes from vetted Illinois installers — no obligation.
- Choose the offer that fits, or walk away.
Illinois Solar Guide may earn a commission from quote partners when you request quotes — at no extra cost to you.