See the chart below to see how different types of solar panel installations compare in 21720.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical 21720 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 21720. [1]
The region associated with 21720 has an average monthly Global Horizontal Irradiance (GHI) of 4.03 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 2% greater than the average monthly Direct Normal Irradiance (DNI) of 3.97 kWh/m2/day. [1]
Solar installations in 21720 that are always titled at the latitude of Cavetown (Average Tilt at Latitude or ATaL) average 4.69 kWh/m2/day, or about 16% greater than the average monthly GHI of 4.03 kWh/m2/day and approximately 18% greater than the average monthly DNI of 3.97 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 21720.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
The region associated with 21720 has a average annual solar radiation value of 4.8 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in 21720 is July with an average of 5.75 kWh/m2/day, followed by June at 5.7 kWh/m2/day and August at 5.67 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in 21720 are December with an average of 3.21 kWh/m2/day, followed by January with an average of 3.67 kWh/m2/day and November at 3.94 kWh/m2/day. [1]
The average monthly solar radiation level in 21720, of 4.8 kilowatt hours per square meter per day (kWh/m2/day) is approximately 22% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 27% 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 21720 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 21720 at the current time.
Monthly AC solar system output averages for 21720. Month-by-month solar power, as ranked by AC output, in 21720. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
21720 has a average annual solar AC output value of 5422.84 kilowatt hours (AC). [2]
The month with the highest historical solar power output in 21720 is July with an average of 521.78 kWhac, followed by August at 518.07 kWhac and June at 511.54 kWhac. [2]
The three months that historically average the lowest average solar output levels in 21720 are December with an average of 328.5 kWhac, followed by November with an average of 375.22 kWhac and January at 379.62 kWhac. [2]
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The ZIP code 21720 is associated with the city of Cavetown in Washington County in Maryland.
To learn more about solar energy and solar power in 21720, or for more solar-related resources for MD, check out the U.S. Energy Information Administration.
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