Data update
Published on May 27, 2026 by Derek Eder
In the last 3 months, an additional 892 megawatts (MW) of solar across 4,768 projects have been energized in the State of Illinois, bringing the total to 6,557 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 | Feb 10, 2026 | May 27, 2026 | Change |
|---|---|---|---|
| Energized | 5,665 MW | 6,557 MW | +892 MW |
| Planned | 5,259 MW | 5,832 MW | +573 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) May 2026
- Illinois Solar for All (ILSFA) May 2026
- US EIA-860M (Utility scale projects) Apr 2025