See the chart below to see how different types of solar panel installations compare in Duncan.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Duncan, OK data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Duncan. [1]
Duncan has an average monthly Global Horizontal Irradiance (GHI) of 4.79 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 10% less than the average monthly Direct Normal Irradiance (DNI) of 5.33 kWh/m2/day. [1]
Solar installations in Duncan that are always titled at the latitude of Duncan (Average Tilt at Latitude or ATaL) average 5.48 kWh/m2/day, or about 14% greater than the average monthly GHI of 4.79 kWh/m2/day and approximately 3% greater than the average monthly DNI of 5.33 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 Duncan.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Duncan, OK has a average annual solar radiation value of 5.68 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Duncan is August with an average of 6.3 kWh/m2/day, followed by September at 6.25 kWh/m2/day and July at 6.2 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Duncan (Oklahoma) are December with an average of 4.41 kWh/m2/day, followed by November with an average of 5.27 kWh/m2/day and January at 5.28 kWh/m2/day. [1]
The average monthly solar radiation level in Duncan, OK, of 5.68 kilowatt hours per square meter per day (kWh/m2/day) is approximately 45% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 14% 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 Duncan 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 Duncan, OK at this current time.
Monthly AC solar system output averages for Duncan (ok). Month-by-month solar power, as ranked by AC output, in Duncan. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Duncan (OK) has a average annual solar AC output value of 6321.96 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Duncan is August with an average of 566.33 kWhac, followed by July at 560.64 kWhac and September at 558.99 kWhac. [2]
The three months that historically average the lowest average solar output levels in Duncan (Oklahoma) are December with an average of 438.45 kWhac, followed by February with an average of 483.53 kWhac and November at 493.53 kWhac. [2]
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Vote now: Given all of the data and analysis provided for Duncan, is solar power a good choice for residents of this city?
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The city of Duncan, OK in Stephens County has an approximate population of 23,431. [6]
To learn more about solar energy and solar power Duncan, OK, or for more solar-related resources for Duncan, visit the U.S. Energy Information Administration.
Some tax incentives and rebate programs are designed to spur the use of solar energy. These vary by location.
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