Based on historical 91790 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 91790.[1]
The region associated with 91790 has an average monthly Global Horizontal Irradiance (GHI) of 5.23 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 7% less than the average monthly Direct Normal Irradiance (DNI) of 5.63 kWh/m2/day. [1]
Solar installations in 91790 that are always titled at the latitude of West Covina (Average Tilt at Latitude or ATaL) average 5.96 kWh/m2/day, or about 14% greater than the average monthly GHI of 5.23 kWh/m2/day and approximately 6% greater than the average monthly DNI of 5.63 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 91790
Solar Radiation Data in 91790
See the chart below for monthly solar radiation levels in 91790.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for 91790
The region associated with 91790 has a average annual solar radiation value of 6.12 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in 91790 is August with an average of 7.08 kWh/m2/day, followed by September at 6.85 kWh/m2/day and July at 6.63 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in 91790 are February with an average of 5.29 kWh/m2/day, followed by December with an average of 5.3 kWh/m2/day and January at 5.34 kWh/m2/day. [1]
Solar Power Comparison: 91790 vs. the U.S.
Solar Power Levels in 91790
The average monthly solar radiation level in 91790, of 6.12 kilowatt hours per square meter per day (kWh/m2/day) is approximately 56% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 7% 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: 91790 vs. the U.S.
Below is a month-by-month comparison of how average 91790 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 91790 at the current time.
Solar Power Output in 91790
The Power of Solar in 91790
Monthly AC solar system output averages for 91790. Month-by-month solar power, as ranked by AC output, in 91790. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for 91790
91790 has a average annual solar AC output value of 6703.09 kilowatt hours (AC). [2]
The month with the highest historical solar power output in 91790 is August with an average of 635.87 kWhac, followed by July at 606.93 kWhac and September at 605.67 kWhac. [2]
The three months that historically average the lowest average solar output levels in 91790 are February with an average of 458.26 kWhac, followed by December with an average of 503.87 kWhac and January at 505.43 kWhac. [2]
The ZIP code 91790 is associated with the city of West Covina in Los Angeles County in California.
91790 Solar Energy & Power
To learn more about solar energy and solar power in 91790, or for more solar-related resources for CA, check out the U.S. Energy Information Administration.
Did you know?
About half of the sun's energy is absorbed by the Earth's surface; about 30 percent is reflected back from the surface.