Based on historical Rock Falls, IL data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Rock Falls.[1]
Rock Falls has an average monthly Global Horizontal Irradiance (GHI) of 3.92 kilowatt hours per square meter per day (kWh/m2/day), which is approximately equal to the average monthly Direct Normal Irradiance (DNI) of 3.92 kWh/m2/day. [1]
Solar installations in Rock Falls that are always titled at the latitude of Rock Falls (Average Tilt at Latitude or ATaL) average 4.55 kWh/m2/day, or about 16% greater than the average monthly GHI of 3.92 kWh/m2/day and approximately 16% greater than the average monthly DNI of 3.92 kWh/m2/day. [1]
Solar Energy Glossary
Global Horizontal Irradiance (GHI)
Global Horizontal Irradiance: The total amount of solar radiation that is received per unit area by a surface that is always positioned in a horizontal manner.
Direct Normal Irradiance (DNI)
Direct Normal Irradiance: The total amount of solar radiation received per unit area by a surface that is always perpendicular to the sun rays that come in a straight line from the direction of the sun at its current position in the sky.
Average Tilt at Latitude (ATaL)
Average Tilt at Latitude: The total amount of solar radiation received per unit area by a surface that is tilted toward the equator at an angle equal to the current latitude. ATaL will often produce the optimum energy output.
Solar Radiation Levels in Rock Falls
Solar Radiation Data in Rock Falls, IL
See the chart below for monthly solar radiation levels in Rock Falls.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Rock Falls, IL
Rock Falls, IL has a average annual solar radiation value of 4.82 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Rock Falls is August with an average of 6.02 kWh/m2/day, followed by July at 5.94 kWh/m2/day and June at 5.79 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Rock Falls (Illinois) are December with an average of 2.83 kWh/m2/day, followed by January with an average of 3.36 kWh/m2/day and November at 3.59 kWh/m2/day. [1]
Solar Power Comparison: Rock Falls vs. the U.S.
Solar Power Levels in Rock Falls
The average monthly solar radiation level in Rock Falls, IL, of 4.82 kilowatt hours per square meter per day (kWh/m2/day) is approximately 23% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 27% less than the average level of 6.61 kWh/m2/day in a city with historically high levels (NV). [1]
→ Values listed as 0 (zero) are not available (N/A).
Solar Power: Rock Falls vs. the U.S.
Below is a month-by-month comparison of how average Rock Falls solar radiation levels compare to average levels in a city with historcially high levels (NV) and a city 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).
We do not currently have data on solar panel installations in the city of Rock Falls, IL at this current time.
Solar Power Output in Rock Falls
The Power of Solar in Rock Falls, IL
Monthly AC solar system output averages for Rock Falls (il). Month-by-month solar power, as ranked by AC output, in Rock Falls. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Rock Falls, IL
Rock Falls (IL) has a average annual solar AC output value of 5537.16 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Rock Falls is August with an average of 563.79 kWhac, followed by July at 546.32 kWhac and May at 534.9 kWhac. [2]
The three months that historically average the lowest average solar output levels in Rock Falls (Illinois) are December with an average of 292.97 kWhac, followed by January with an average of 351.08 kWhac and November at 352.1 kWhac. [2]
Cost of Utilities in Rock Falls
Rock Falls Electricity Costs
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Solar Power Poll: Rock Falls
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Rock Falls Natural Gas Costs
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Fresh Breeze: 19 mps ESE
Precip.: Chance of Rain
Humidity: 83%
Cloud cover: 100%
More about Rock Falls
About Rock Falls
The city of Rock Falls, IL in Whiteside County has an approximate population of 9,266. [6]
Rock Falls, IL Solar Energy
To learn more about solar energy and solar power Rock Falls, IL, or for more solar-related resources for Rock Falls, visit the U.S. Energy Information Administration.
Did you know?
Solar cells convert sunlight into electricity through a physical process known as the photovoltaic effect.
