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Solar Power in 78666 (San Marcos, TX)

Solar Energy in 78666

The month of August has the highest historical solar radition values in 78666 with an average of 6.14 kWh/m2/day. [More]

Solar Panels in 78666

Solar panels in 78666 that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in 78666

The total length of the day in 78666 (San Marcos, TX) today (June 29, 2022) will be 14 hours and 3 minutes. [More]

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78666 Solar Energy

Solar Energy in 78666 (San Marcos, TX)

Solar Energy Data for 78666

See the chart below to see how different types of solar panel installations compare in 78666.

* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.


Solar Energy Analysis for 78666

Solar Radiation Data in 78666

Based on historical 78666 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 78666. [1]

The region associated with 78666 has an average monthly Global Horizontal Irradiance (GHI) of 4.73 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 2% greater than the average monthly Direct Normal Irradiance (DNI) of 4.63 kWh/m2/day. [1]

Solar installations in 78666 that are always titled at the latitude of San Marcos (Average Tilt at Latitude or ATaL) average 5.17 kWh/m2/day, or about 9% greater than the average monthly GHI of 4.73 kWh/m2/day and approximately 12% greater than the average monthly DNI of 4.63 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 78666

Solar Radiation Data in 78666

See the chart below for monthly solar radiation levels in 78666.

* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)

Solar Radiation Analysis for 78666

Solar Radiation Data in 78666

The region associated with 78666 has a average annual solar radiation value of 5.44 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in 78666 is August with an average of 6.14 kWh/m2/day, followed by October at 6.02 kWh/m2/day and September at 5.92 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in 78666 are December with an average of 4.41 kWh/m2/day, followed by January with an average of 4.94 kWh/m2/day and November at 5.02 kWh/m2/day. [1]

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Solar Power Comparison: 78666 vs. the U.S.

Solar Power Levels in 78666

The average monthly solar radiation level in 78666, of 5.44 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).

Solar Power: 78666 vs. the U.S.

Below is a month-by-month comparison of how average 78666 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).

Solar Data & Statistics for 78666

Sunrise / Sunset in 78666

  • Sunrise/Sunset for June 29, 2022 [2]
    • Sunrise: 6:33 am
    • Sunset: 8:36 pm
    • Length of Day: 14:3
Solar Energy Statistics for 78666

Best Months for Solar in 78666

  • Top Solar Power Months Historically [1]
    • Solar Radiation August (6.14 kWh/m2/day)
    • ATaL: August (6.19 kWh/m2/day)
    • DNI: July (5.7 kWh/m2/day)
    • GHI: June (6.6 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in 78666

We do not have data on solar panel installations in ZIP Code 78666 at the current time.

Solar Power Output in 78666

The Power of Solar in 78666

Monthly AC solar system output averages for 78666. Month-by-month solar power, as ranked by AC output, in 78666. [2]

* Amounts listed in kWhac (kilowatt hours (AC))

Solar Output Analysis for 78666

Solar Radiation Data in 78666

78666 has a average annual solar AC output value of 6002.84 kilowatt hours (AC). [2]

The month with the highest historical solar power output in 78666 is October with an average of 559.52 kWhac, followed by August at 552.7 kWhac and July at 534.5 kWhac. [2]

The three months that historically average the lowest average solar output levels in 78666 are December with an average of 432.84 kWhac, followed by February with an average of 461.88 kWhac and November at 472.32 kWhac. [2]

Weather Forecast for 78666 [5]

Tue Jun 28
86°F
Moderate Rain
Min: 72°F
Max: 87°F
Moderate breeze: 14 mps N
Precip.: Chance of Rain
Humidity: 61%
Cloud cover: 99%
Wed Jun 29
93°F
Broken Clouds
Min: 74°F
Max: 96°F
Moderate breeze: 15 mps SE
Precip.: n/a
Humidity: 35%
Cloud cover: 60%
Thu Jun 30
86°F
Light Rain
Min: 72°F
Max: 86°F
Moderate breeze: 16 mps ESE
Precip.: Chance of Rain
Humidity: 52%
Cloud cover: 66%
Fri Jul 1
86°F
Moderate Rain
Min: 71°F
Max: 89°F
Moderate breeze: 13 mps SE
Precip.: Chance of Rain
Humidity: 61%
Cloud cover: 92%
Sat Jul 2
93°F
Light Rain
Min: 74°F
Max: 95°F
Moderate breeze: 17 mps SE
Precip.: Chance of Rain
Humidity: 42%
Cloud cover: 23%
Sun Jul 3
94°F
Scattered Clouds
Min: 73°F
Max: 97°F
Fresh Breeze: 19 mps SE
Precip.: n/a
Humidity: 39%
Cloud cover: 28%

More about 78666

About 78666

The ZIP code 78666 is associated with the city of San Marcos in Hays County in Texas.

78666 Solar Power

78666 Solar Energy & Power

To learn more about solar energy and solar power in 78666, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.

Did you know?

Various missions to space by different countries are known to utilize solar energy as a main power source.

Cities in Texas

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References

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