Based on historical 78636 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 78636.[1]
The region associated with 78636 has an average monthly Global Horizontal Irradiance (GHI) of 4.85 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 4% less than the average monthly Direct Normal Irradiance (DNI) of 5.03 kWh/m2/day. [1]
Solar installations in 78636 that are always titled at the latitude of Johnson City (Average Tilt at Latitude or ATaL) average 5.35 kWh/m2/day, or about 10% greater than the average monthly GHI of 4.85 kWh/m2/day and approximately 6% greater than the average monthly DNI of 5.03 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 78636
Solar Radiation Data in 78636
See the chart below for monthly solar radiation levels in 78636.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for 78636
The region associated with 78636 has a average annual solar radiation value of 5.54 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in 78636 is August with an average of 6.37 kWh/m2/day, followed by September at 6.17 kWh/m2/day and July at 5.95 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in 78636 are December with an average of 4.7 kWh/m2/day, followed by November with an average of 4.84 kWh/m2/day and January at 4.93 kWh/m2/day. [1]
Solar Power Comparison: 78636 vs. the U.S.
Solar Power Levels in 78636
The average monthly solar radiation level in 78636, of 5.54 kilowatt hours per square meter per day (kWh/m2/day) is approximately 41% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 16% 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: 78636 vs. the U.S.
Below is a month-by-month comparison of how average 78636 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 78636 at the current time.
Solar Power Output in 78636
The Power of Solar in 78636
Monthly AC solar system output averages for 78636. Month-by-month solar power, as ranked by AC output, in 78636. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for 78636
78636 has a average annual solar AC output value of 6135.26 kilowatt hours (AC). [2]
The month with the highest historical solar power output in 78636 is August with an average of 581.45 kWhac, followed by September at 546.91 kWhac and October at 542.09 kWhac. [2]
The three months that historically average the lowest average solar output levels in 78636 are November with an average of 449.21 kWhac, followed by February with an average of 460.53 kWhac and December at 463.52 kWhac. [2]
Moderate breeze: 13 mps S
Precip.: Chance of Rain
Humidity: 64%
Cloud cover: 84%
More about 78636
About 78636
The ZIP code 78636 is associated with the city of Johnson City in Blanco County in Texas.
78636 Solar Energy & Power
To learn more about solar energy and solar power in 78636, 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.