Every rule on this topic across the stack of authorities, in order from highest authority to most local — with any state or federal rule that overrides a conflicting HOA provision flagged.
Illinois statutes (ILCS) that govern community associations and override conflicting HOA rules. Source →
765 ILCS 165 bars homeowners' associations from prohibiting solar energy systems (including solar panels). An association may regulate the LOCATION of a system (so long as it does not significantly impair performance or raise cost prohibitively) but may not ban it, and must adopt an energy policy within the statutory period after a request. This overrides a conflicting HOA solar prohibition.
Informational only — not legal advice. These are public rules summarized from the linked sources; they change, and overlapping jurisdictions can disagree. Verify against the linked source and the governing body (the Village, your association, the county) before acting.