Illinois state reference
Illinois solar, checked against local sources.
Illinois solar math now depends on utility territory, Smart Solar Billing, REC value timing, and the post-25D federal landscape.
- Cities
- 104
- Utilities
- 3
- Focus
- ComEd, Ameren, and Illinois Shines
Utility record
Billing rules before sales math.
Each hub checks the active net-metering rider, export treatment, and incentive layer.
- COMED Commonwealth Edison → Northern Illinois, Chicago metro and surrounding counties
- AMEREN Ameren Illinois → Central and southern Illinois, Springfield, Peoria, and downstate territories
- NAPERVILLE ELECTRIC Naperville Electric Utility → City of Naperville and adjacent unincorporated DuPage parcels served by the municipal utility
City pages
Start where quote volume is highest.
The highest-traffic references come first. The full county directory follows below.
- LAKE COUNTY · COMMONWEALTH EDISON Lake Zurich → 7 kW typical · 7-8 yr cash payback
- COOK/DUPAGE COUNTY · COMMONWEALTH EDISON Schaumburg → 7 kW typical · 7-8 yr cash payback
- DUPAGE COUNTY · NAPERVILLE ELECTRIC UTILITY Naperville → 7 kW typical · 9-11 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Arlington Heights → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Evanston → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Skokie → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Des Plaines → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Mount Prospect → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Palatine → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Hoffman Estates → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Rolling Meadows → 7 kW typical · 7-8 yr cash payback
- COOK COUNTY · COMMONWEALTH EDISON Elk Grove Village → 7 kW typical · 7-8 yr cash payback
Full directory
All 104 published Illinois city pages.
Grouped by county for scanning without turning the page into a wall of tiles.
Cook County
- Arlington Heights
- Evanston
- Skokie
- Des Plaines
- Mount Prospect
- Palatine
- Hoffman Estates
- Rolling Meadows
- Elk Grove Village
- Streamwood
- Hanover Park
- Bartlett
- Wheeling
- Northbrook
- Glenview
- Wilmette
- Park Ridge
- Niles
- Morton Grove
- Oak Park
- River Forest
- Forest Park
- La Grange
- La Grange Park
- Western Springs
- Brookfield
- Oak Lawn
- Evergreen Park
- Burbank
- Chicago Ridge
- Hickory Hills
- Bridgeview
- Palos Hills
- Palos Heights
- Orland Park
- Tinley Park
- Oak Forest
- Midlothian
- Alsip
- Homewood
- Matteson
- Lansing
- South Holland
Cook/DuPage County
DuPage County
Kane County
Lake County
McHenry County
Will County
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.
- Illinois Solar Buyback Rates Explained How net export compensation works under ComEd Smart Solar Billing versus Ameren, why the headline buyback rate is not the all-in retail rate, and how the January 2025 change reshaped payback math for new installations.
- 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.
- The "Illinois 25% State Tax Credit" Myth There is no 25% state income-tax credit for solar in Illinois. The Illinois Department of Revenue enumerates 76 individual income-tax credits; zero are for residential solar or photovoltaics. What homeowners are usually being shown when they hear "25%" is the Illinois Shines SREC program structured to look like a credit on a sales worksheet.