See the chart below to see how different types of solar panel installations compare in 40831.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical 40831 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 40831. [1]
The region associated with 40831 has an average monthly Global Horizontal Irradiance (GHI) of 4.07 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 6% greater than the average monthly Direct Normal Irradiance (DNI) of 3.85 kWh/m2/day. [1]
Solar installations in 40831 that are always titled at the latitude of Harlan (Average Tilt at Latitude or ATaL) average 4.62 kWh/m2/day, or about 14% greater than the average monthly GHI of 4.07 kWh/m2/day and approximately 20% greater than the average monthly DNI of 3.85 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 40831.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
The region associated with 40831 has a average annual solar radiation value of 4.85 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in 40831 is August with an average of 5.65 kWh/m2/day, followed by June at 5.55 kWh/m2/day and April at 5.5 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in 40831 are December with an average of 3.57 kWh/m2/day, followed by January with an average of 3.82 kWh/m2/day and February at 4.13 kWh/m2/day. [1]
The average monthly solar radiation level in 40831, of 4.85 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).
Below is a month-by-month comparison of how average 40831 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 have data on solar panel installations in ZIP Code 40831 at the current time.
Monthly AC solar system output averages for 40831. Month-by-month solar power, as ranked by AC output, in 40831. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
40831 has a average annual solar AC output value of 5312.38 kilowatt hours (AC). [2]
The month with the highest historical solar power output in 40831 is August with an average of 505.69 kWhac, followed by April at 489.92 kWhac and May at 487.61 kWhac. [2]
The three months that historically average the lowest average solar output levels in 40831 are December with an average of 348.94 kWhac, followed by February with an average of 362.88 kWhac and January at 374.87 kWhac. [2]
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The ZIP code 40831 is associated with the city of Harlan in Harlan County in Kentucky.
To learn more about solar energy and solar power in 40831, or for more solar-related resources for KY, check out the U.S. Energy Information Administration.
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