See the chart below to see how different types of solar panel installations compare in Washington.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Washington, 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 Washington. [1]
Washington has an average monthly Global Horizontal Irradiance (GHI) of 3.99 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 1% greater than the average monthly Direct Normal Irradiance (DNI) of 3.97 kWh/m2/day. [1]
Solar installations in Washington that are always titled at the latitude of Washington (Average Tilt at Latitude or ATaL) average 4.62 kWh/m2/day, or about 16% greater than the average monthly GHI of 3.99 kWh/m2/day and approximately 16% greater than the average monthly DNI of 3.97 kWh/m2/day. [1]
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: 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: 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.
See the chart below for monthly solar radiation levels in Washington.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Washington, IL has a average annual solar radiation value of 4.97 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Washington is July with an average of 6.2 kWh/m2/day, followed by August at 5.99 kWh/m2/day and June at 5.85 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Washington (Illinois) are December with an average of 3.16 kWh/m2/day, followed by January with an average of 3.54 kWh/m2/day and November at 3.9 kWh/m2/day. [1]
The average monthly solar radiation level in Washington, IL, of 4.97 kilowatt hours per square meter per day (kWh/m2/day) is approximately 26% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 25% 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).
Below is a month-by-month comparison of how average Washington 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 Washington, IL at this current time.
Monthly AC solar system output averages for Washington (il). Month-by-month solar power, as ranked by AC output, in Washington. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Washington (IL) has a average annual solar AC output value of 5676.55 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Washington is July with an average of 569.49 kWhac, followed by August at 554.63 kWhac and May at 534.76 kWhac. [2]
The three months that historically average the lowest average solar output levels in Washington (Illinois) are December with an average of 326.69 kWhac, followed by January with an average of 369.08 kWhac and November at 382.08 kWhac. [2]
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Vote now: Given all of the data and analysis provided for Washington, is solar power a good choice for residents of this city?
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The city of Washington, IL in Tazewell County has an approximate population of 15,134. [6]
To learn more about solar energy and solar power Washington, IL, or for more solar-related resources for Washington, visit the U.S. Energy Information Administration.
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