See the chart below to see how different types of solar panel installations compare in Keystone.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Keystone, SD data, solar panels that always track the sun throughout the day will produce the maximum solar energy output in Keystone. [1]
Keystone has an average monthly Global Horizontal Irradiance (GHI) of 4.33 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 23% less than the average monthly Direct Normal Irradiance (DNI) of 5.62 kWh/m2/day. [1]
Solar installations in Keystone that are always titled at the latitude of Keystone (Average Tilt at Latitude or ATaL) average 5.4 kWh/m2/day, or about 25% greater than the average monthly GHI of 4.33 kWh/m2/day and approximately 4% less than the average monthly DNI of 5.62 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 Keystone.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Keystone, SD has a average annual solar radiation value of 5.53 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Keystone is July with an average of 6.6 kWh/m2/day, followed by August at 6.3 kWh/m2/day and June at 6.25 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Keystone (South Dakota) are December with an average of 4.23 kWh/m2/day, followed by January with an average of 4.57 kWh/m2/day and November at 4.63 kWh/m2/day. [1]
The average monthly solar radiation level in Keystone, SD, of 5.53 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).
Below is a month-by-month comparison of how average Keystone 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 town of Keystone, SD at this current time.
Monthly AC solar system output averages for Keystone (sd). Month-by-month solar power, as ranked by AC output, in Keystone. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Keystone (SD) has a average annual solar AC output value of 6314.6 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Keystone is July with an average of 604.17 kWhac, followed by March at 585.57 kWhac and August at 579.15 kWhac. [2]
The three months that historically average the lowest average solar output levels in Keystone (South Dakota) are December with an average of 430.24 kWhac, followed by November with an average of 452.7 kWhac and January at 472.51 kWhac. [2]
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The town of Keystone, SD in Pennington County has an approximate population of 337. [6]
To learn more about solar energy and solar power Keystone, SD, or for more solar-related resources for Keystone, visit the U.S. Energy Information Administration.
Some tax incentives and rebate programs are designed to spur the use of solar energy. These vary by location.
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