Data update
Published on Sep 18, 2026 by Derek Eder
In the last 4 months, an additional 783 megawatts (MW) of solar across 6,605 projects have been energized in the State of Illinois, bringing the total to 7,340 MW. Despite the expiration of the 30% Residential Clean Energy Tax Credit in 2025, solar projects continue to be deployed across the state at a record pace.
| Category | May 27, 2026 | Sept 18, 2026 | Change |
|---|---|---|---|
| Energized | 6,557 MW | 7,340 MW | +783 MW |
| Planned | 5,832 MW | 5,880 MW | +48 MW |
Data from our 3 primary sources are updated at different intervals, so the above data is valid as of the following the dates:
- Illinois Adjustable Block Program (ABP) Sept 2026
- Illinois Solar for All (ILSFA) Sept 2026
- US EIA-860M (Utility scale projects) July 2025