Illinois
Rooftop solar in Illinois
Illinois splits between two investor-owned utilities — ComEd serving Chicagoland and Ameren Illinois covering most of downstate. A handful of municipalities run their own electric utilities outside the major IOU territories, which changes the solar economics meaningfully. The Illinois Shines program administers renewable-energy-credit payments for residential systems statewide.
Utility coverage
ComEd
Investor-owned utility serving Chicago and the surrounding suburbs (Cook, DuPage, Lake, Will, Kane counties and surrounding areas).
Ameren Illinois
Investor-owned utility serving central and southern Illinois.
Municipal utilities
Some Illinois cities run their own electric utilities outside ComEd or Ameren territory — notably Naperville Electric Utility, Batavia, Geneva, and St. Charles. Solar economics for these addresses can differ substantially from the IOU service areas.
Cities
Detailed city pages with cost ranges, local incentives, and installer comparisons are being added.
- Lake Zurich (Lake County, ComEd)
- More cities being added