Plug-in solar in Illinois
Status not yet confirmed Checked November 10, 2026
Trackers report Illinois plug-in solar bills (SB 3104 and HB 4371) but disagree on whether they are still moving. We could not confirm on the Illinois General Assembly website yet, so Illinois's status is unknown.
The rules
Illinois has no enacted plug-in solar law. There are no state rules to list; your utility's interconnection rules apply.
What's next
Confirm SB 3104 and HB 4371 on ilga.gov. The 104th General Assembly runs until January 2027, and the fall veto session can move bills.
What could it save?
For an 800 W panel kit at Illinois's average residential price of 18.91¢/kWh (September 2025 – August 2026 (12 months)):
- Ideal tilt (20°, south)
- 1,102 kWh a year: about $144 typical (69% used at home), up to $208 best case (100%)
- Vertical railing (90°, south)
- 733 kWh a year: about $96 typical (69% used at home), up to $139 best case (100%)
"Typical" uses HTW Berlin's model for an 800 W system without a battery; exports are assumed to earn nothing. Solar data: NREL PVWatts for Springfield (capital). Try your own numbers · Is it worth it? · Railing vs tilted
Price source: EIA residential average, September 2025 – August 2026 (12 months).
Neighbouring states
- Iowa: Bill failed or died
- Indiana: Bill failed or died
- Kentucky: No bill found
- Missouri: Bill failed or died
- Wisconsin: No bill found
Related: is it worth it? · railing vs tilted panels · renters guide · all kits · Certification watch · how we verify
Sources
- Illinois General Assembly: SB 3104 (104th GA) bill status (Legislature bill page; accessed November 10, 2026) Server certificate chain could not be verified from our environment.
- Plug-In Solar Guide state list (lead only) (Lead only (not relied on); accessed November 10, 2026)
Research note: Trackers report SB 3104 and HB 4371 (plug-in solar) in the 104th General Assembly, with conflicting accounts of whether SB 3104 was abandoned. ilga.gov sends a certificate chain we could not verify.
This page is general information, not legal or electrical advice. Laws change and utilities differ. Check the linked official sources, your lease or HOA rules, and your utility before you buy or install anything. Full disclaimer.