See the chart below to see how different types of solar panel installations compare in 78631.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical 78631 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 78631. [1]
The region associated with 78631 has an average monthly Global Horizontal Irradiance (GHI) of 4.91 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 6% less than the average monthly Direct Normal Irradiance (DNI) of 5.2 kWh/m2/day. [1]
Solar installations in 78631 that are always titled at the latitude of Harper (Average Tilt at Latitude or ATaL) average 5.43 kWh/m2/day, or about 11% greater than the average monthly GHI of 4.91 kWh/m2/day and approximately 4% greater than the average monthly DNI of 5.2 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 78631.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
The region associated with 78631 has a average annual solar radiation value of 5.67 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in 78631 is August with an average of 6.12 kWh/m2/day, followed by April at 6.09 kWh/m2/day and July at 6.04 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in 78631 are December with an average of 4.96 kWh/m2/day, followed by November with an average of 5.1 kWh/m2/day and February at 5.41 kWh/m2/day. [1]
The average monthly solar radiation level in 78631, of 5.67 kilowatt hours per square meter per day (kWh/m2/day) is approximately 44% 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 78631 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 78631 at the current time.
Monthly AC solar system output averages for 78631. Month-by-month solar power, as ranked by AC output, in 78631. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
78631 has a average annual solar AC output value of 6290.81 kilowatt hours (AC). [2]
The month with the highest historical solar power output in 78631 is March with an average of 562.84 kWhac, followed by October at 556.52 kWhac and August at 556.44 kWhac. [2]
The three months that historically average the lowest average solar output levels in 78631 are November with an average of 472.69 kWhac, followed by February with an average of 474.59 kWhac and December at 486.76 kWhac. [2]
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The ZIP code 78631 is associated with the city of Harper in Gillespie County in Texas.
To learn more about solar energy and solar power in 78631, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.
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