Based on historical 77964 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 77964.[1]
The region associated with 77964 has an average monthly Global Horizontal Irradiance (GHI) of 4.7 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 6% greater than the average monthly Direct Normal Irradiance (DNI) of 4.45 kWh/m2/day. [1]
Solar installations in 77964 that are always titled at the latitude of Hallettsville (Average Tilt at Latitude or ATaL) average 5.12 kWh/m2/day, or about 9% greater than the average monthly GHI of 4.7 kWh/m2/day and approximately 15% greater than the average monthly DNI of 4.45 kWh/m2/day. [1]
Solar Energy Glossary
Global Horizontal Irradiance (GHI)
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 (DNI)
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 (ATaL)
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.
Solar Radiation Levels in 77964
Solar Radiation Data in 77964
See the chart below for monthly solar radiation levels in 77964.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for 77964
The region associated with 77964 has a average annual solar radiation value of 5.23 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in 77964 is August with an average of 5.97 kWh/m2/day, followed by September at 5.89 kWh/m2/day and July at 5.66 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in 77964 are December with an average of 4.33 kWh/m2/day, followed by February with an average of 4.57 kWh/m2/day and January at 4.59 kWh/m2/day. [1]
Solar Power Comparison: 77964 vs. the U.S.
Solar Power Levels in 77964
The average monthly solar radiation level in 77964, of 5.23 kilowatt hours per square meter per day (kWh/m2/day) is approximately 33% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 21% 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).
Solar Power: 77964 vs. the U.S.
Below is a month-by-month comparison of how average 77964 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 77964 at the current time.
Solar Power Output in 77964
The Power of Solar in 77964
Monthly AC solar system output averages for 77964. Month-by-month solar power, as ranked by AC output, in 77964. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for 77964
77964 has a average annual solar AC output value of 5800.72 kilowatt hours (AC). [2]
The month with the highest historical solar power output in 77964 is August with an average of 540.21 kWhac, followed by September at 527.22 kWhac and October at 517.03 kWhac. [2]
The three months that historically average the lowest average solar output levels in 77964 are February with an average of 400.04 kWhac, followed by December with an average of 430.38 kWhac and January at 450.17 kWhac. [2]
Gentle Breeze: 12 mps NNE
Precip.: Chance of Rain
Humidity: 86%
Cloud cover: 100%
Thu Sep 12
87°F
Light Rain
Min: 72°F
Max: 89°F
Gentle Breeze: 10 mps NNE
Precip.: Chance of Rain
Humidity: 54%
Cloud cover: 71%
More about 77964
About 77964
The ZIP code 77964 is associated with the city of Hallettsville in Lavaca County in Texas.
77964 Solar Energy & Power
To learn more about solar energy and solar power in 77964, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.
Did you know?
Some tax incentives and rebate programs are designed to spur the use of solar energy. These vary by location.