The average monthly solar radiation level in Illinois's capital city, Springfield, of 4.41 kilowatt hours per square meter per day (kWh/m2/day) is approximately 18% greater than the average level of 3.73 kWh/m2/day in an area with historically low levels (WA) and is approximately 33% less than the average level of 6.6 kWh/m2/day in an area with historically high levels (NV). [1]
→ Values listed as 0 (zero) are not available (N/A).
→ Illinois values listed here are based on the capital, Springfield.
Below is a month-by-month comparison of how average Illinois solar radiation levels compare to average levels in an area with historcially high levels (NV) and one with historically low levels (WA). [1]
→ k/m/d = kWh/m2/day = kilowatt hours per square meter per day.
→ Values listed as 0 (zero) are not available (N/A).
→ Illinois values listed here are based on the capital, Springfield.
A look at solar installs in Illinois. The chart below visualizes install totals for the top five counties in IL vs. the cumulative install total of rest of IL counties combined.
There are currently at least 1,488 solar panel installations throughout the state of Illinois right now. [1]
Note: Install totals presented here are those voluntarily contributed from a variety of sources including solar incentive programs, utilities, installers, and the general public. [1] Data for some states is thinner than others.
The Solar Foundation recently published the National Solar Jobs Census 2015, its yearly update of current employment, job trends, and growth projections in the U.S.
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Residential electricity prices in Illinois averaged 12.22 cents per kilowatthour (¢/kWh) in January 2019, which was approximately 2% less than the overall U.S. average residential electricity rate of 12.47¢/kWh in January. [2]
Vote now: What do you think? Are solar panels & solar power a good choice for residents of the state of Illinois?
Residential natural gas prices in Illinois averaged $6.86 per thousand cubic feet (Mcf) in January 2019, which was about 27% less than the overall U.S. average residential natural gas rate of $9.43 per Mcf in January. [3]
Illinois ranks 7th among all states in the U.S. with a population of approximately 12,830,632. [4]
To learn more about solar energy and solar power in Illinois, or for additional solar-related resources in IL, visit the U.S. Energy Information Administration.
Nineteen-year-old Edmund Becquerel, a French experimental physicist, discovered the basis of solar energy in 1839.
