ILLINOIS · STATE REFERENCE
Solar in Illinois
Illinois has 0 regulated electric utilities for residential service. Net-metering rules, REC programs, and incentive structures differ from federal-level rules and from neighboring states. Page-level analyses on this site take each utility and city separately.
Coverage map
The orange-tinted region is the covered metro. Dots mark the anchor cities with full diagnostic pages published. The remaining Illinois cities included in the site are listed in the city directory below.
Utilities covered
Each utility hub covers the current net-metering rider, the billing-cycle treatment of exports, and any state-level incentives layered on top.
Cities with published research
Each city page walks the same diagnostic: typical production for the local ZIP, current utility rates, the incentive stack, and the conditions under which the math works.
Reference articles
Policy explainers and buyer-side diagnostics that apply across the state.
- The Federal Solar Credit in 2026 Section 25D expired December 31, 2025 under Public Law 119-21. What that means for cash and loan installs in 2026, what Section 48E still covers for third-party-owned systems, and how to spot a stale-data quote.
- How to Read a Solar Quote A line-by-line walkthrough of a typical residential proposal: system sizing, $/W versus cash price, dealer-fee detection, production estimate methodology, warranty terms, and the questions a quote rarely answers without being asked.
- Solar Quote Questions Worth Asking The questions that make a solar quote easier to judge. P50 versus P90 production estimates, panel-level monitoring access, UCC-1 lien language in financed deals, embedded dealer fees, and what the FTC Holder Rule actually does when an installer fails.