Based on historical Freeport, 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 Freeport.[1]
Freeport has an average monthly Global Horizontal Irradiance (GHI) of 3.86 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 1% greater than the average monthly Direct Normal Irradiance (DNI) of 3.82 kWh/m2/day. [1]
Solar installations in Freeport that are always titled at the latitude of Freeport (Average Tilt at Latitude or ATaL) average 4.46 kWh/m2/day, or about 16% greater than the average monthly GHI of 3.86 kWh/m2/day and approximately 17% greater than the average monthly DNI of 3.82 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 Freeport
Solar Radiation Data in Freeport, IL
See the chart below for monthly solar radiation levels in Freeport.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Freeport, IL
Freeport, IL has a average annual solar radiation value of 4.83 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Freeport is July with an average of 5.95 kWh/m2/day, followed by August at 5.92 kWh/m2/day and June at 5.87 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Freeport (Illinois) are December with an average of 2.98 kWh/m2/day, followed by January with an average of 3.09 kWh/m2/day and November at 3.41 kWh/m2/day. [1]
Solar Power Comparison: Freeport vs. the U.S.
Solar Power Levels in Freeport
The average monthly solar radiation level in Freeport, IL, of 4.83 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: Freeport vs. the U.S.
Below is a month-by-month comparison of how average Freeport 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 Freeport, IL at this current time.
Solar Power Output in Freeport
The Power of Solar in Freeport, IL
Monthly AC solar system output averages for Freeport (il). Month-by-month solar power, as ranked by AC output, in Freeport. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Freeport, IL
Freeport (IL) has a average annual solar AC output value of 5548.74 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Freeport is August with an average of 553.33 kWhac, followed by July at 552.51 kWhac and May at 535.81 kWhac. [2]
The three months that historically average the lowest average solar output levels in Freeport (Illinois) are December with an average of 312.93 kWhac, followed by November with an average of 331.54 kWhac and January at 331.83 kWhac. [2]
Cost of Utilities in Freeport
Freeport Electricity Costs
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Solar Power Poll: Freeport
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Freeport Natural Gas Costs
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Fresh Breeze: 18 mps SE
Precip.: Chance of Rain
Humidity: 87%
Cloud cover: 100%
More about Freeport
About Freeport
The city of Freeport, IL in Stephenson County has an approximate population of 25,638. [6]
Freeport, IL Solar Energy
To learn more about solar energy and solar power Freeport, IL, or for more solar-related resources for Freeport, visit the U.S. Energy Information Administration.
Did you know?
Various missions to space by different countries are known to utilize solar energy as a main power source.