Best Cities for Solar in Illinois
Illinois has 16 tracked locations with an average of 4.1 hrs/day of peak sun and $1,197/year in average solar savings. The best location is Carbondale (62901) with $1,288/year in savings.
16
tracked locations
4.1 hrs
avg peak sun/day
$1,197
avg annual savings
9 yrs
avg payback
Solar Data by ZIP Code in Illinois
| City / ZIP | Peak Sun | 6kW Cost | Annual Savings | Payback |
|---|---|---|---|---|
| Carbondale 62901 | 4.4 hrs | $18,900 | $1,288/yr | 10.3 yrs |
| Alton 62001 | 4.3 hrs | $18,900 | $1,259/yr | 10.5 yrs |
| Springfield 62701 | 4.2 hrs | $18,900 | $1,230/yr | 10.8 yrs |
| Galesburg 61401 | 4.2 hrs | $18,900 | $1,230/yr | 10.8 yrs |
| Champaign 61801 | 4.2 hrs | $18,900 | $1,230/yr | 10.8 yrs |
| Peoria 61602 | 4.1 hrs | $18,900 | $1,201/yr | 11 yrs |
| Kankakee 60901 | 4.1 hrs | $18,900 | $1,201/yr | 11 yrs |
| Elk Grove Village 60007 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Park Ridge 60068 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Wheeling 60090 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Addison 60101 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Oak Park 60301 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Chicago 60601 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Chicago 60602 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Rockford 61101 | 4.0 hrs | $18,900 | $1,171/yr | 11.3 yrs |
| Evanston 60201 | 3.9 hrs | $18,900 | $1,142/yr | 11.6 yrs |
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Data verified March 2026 · Source: NREL, DSIRE, EIA