See the chart below to see how different types of solar panel installations compare in 78121.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical 78121 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 78121. [1]
The region associated with 78121 has an average monthly Global Horizontal Irradiance (GHI) of 4.78 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 3% greater than the average monthly Direct Normal Irradiance (DNI) of 4.65 kWh/m2/day. [1]
Solar installations in 78121 that are always titled at the latitude of La Vernia (Average Tilt at Latitude or ATaL) average 5.21 kWh/m2/day, or about 9% greater than the average monthly GHI of 4.78 kWh/m2/day and approximately 12% greater than the average monthly DNI of 4.65 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 78121.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
The region associated with 78121 has a average annual solar radiation value of 5.42 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in 78121 is August with an average of 6.22 kWh/m2/day, followed by October at 6.1 kWh/m2/day and September at 5.98 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in 78121 are December with an average of 4.51 kWh/m2/day, followed by January with an average of 4.66 kWh/m2/day and November at 4.74 kWh/m2/day. [1]
The average monthly solar radiation level in 78121, of 5.42 kilowatt hours per square meter per day (kWh/m2/day) is approximately 38% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 18% 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 78121 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 78121 at the current time.
Monthly AC solar system output averages for 78121. Month-by-month solar power, as ranked by AC output, in 78121. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
78121 has a average annual solar AC output value of 5964.5 kilowatt hours (AC). [2]
The month with the highest historical solar power output in 78121 is October with an average of 566.23 kWhac, followed by August at 559.27 kWhac and September at 535.59 kWhac. [2]
The three months that historically average the lowest average solar output levels in 78121 are November with an average of 434.86 kWhac, followed by December with an average of 440.59 kWhac and January at 453.36 kWhac. [2]
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The ZIP code 78121 is associated with the city of La Vernia in Wilson County in Texas.
To learn more about solar energy and solar power in 78121, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.
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