See the chart below to see how different types of solar panel installations compare in Gresham.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Gresham, OR data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Gresham. [1]
Gresham has an average monthly Global Horizontal Irradiance (GHI) of 3.46 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 9% greater than the average monthly Direct Normal Irradiance (DNI) of 3.18 kWh/m2/day. [1]
Solar installations in Gresham that are always titled at the latitude of Gresham (Average Tilt at Latitude or ATaL) average 3.94 kWh/m2/day, or about 14% greater than the average monthly GHI of 3.46 kWh/m2/day and approximately 24% greater than the average monthly DNI of 3.18 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 Gresham.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Gresham, OR has a average annual solar radiation value of 4.04 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Gresham is August with an average of 6.23 kWh/m2/day, followed by July at 5.98 kWh/m2/day and June at 5.39 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Gresham (Oregon) are December with an average of 1.72 kWh/m2/day, followed by January with an average of 2.21 kWh/m2/day and November at 2.3 kWh/m2/day. [1]
The average monthly solar radiation level in Gresham, OR, of 4.04 kilowatt hours per square meter per day (kWh/m2/day) is approximately 3% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 39% 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 Gresham 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 currently have data on solar panel installations in the city of Gresham, OR at this current time.
Monthly AC solar system output averages for Gresham (or). Month-by-month solar power, as ranked by AC output, in Gresham. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Gresham (OR) has a average annual solar AC output value of 4490.23 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Gresham is August with an average of 563.75 kWhac, followed by July at 545.53 kWhac and June at 485.75 kWhac. [2]
The three months that historically average the lowest average solar output levels in Gresham (Oregon) are December with an average of 173.54 kWhac, followed by November with an average of 220.25 kWhac and January at 223.07 kWhac. [2]
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The city of Gresham, OR in Multnomah County has an approximate population of 105,594. [6]
To learn more about solar energy and solar power Gresham, OR, or for more solar-related resources for Gresham, visit the U.S. Energy Information Administration.
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