See the chart below to see how different types of solar panel installations compare in Helena.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Helena, OK data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Helena. [1]
Helena has an average monthly Global Horizontal Irradiance (GHI) of 4.76 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 12% less than the average monthly Direct Normal Irradiance (DNI) of 5.39 kWh/m2/day. [1]
Solar installations in Helena that are always titled at the latitude of Helena (Average Tilt at Latitude or ATaL) average 5.53 kWh/m2/day, or about 16% greater than the average monthly GHI of 4.76 kWh/m2/day and approximately 3% greater than the average monthly DNI of 5.39 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 Helena.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Helena, OK has a average annual solar radiation value of 5.71 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Helena is August with an average of 6.5 kWh/m2/day, followed by July at 6.45 kWh/m2/day and September at 6.34 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Helena (Oklahoma) are December with an average of 4.45 kWh/m2/day, followed by January with an average of 4.78 kWh/m2/day and November at 5.1 kWh/m2/day. [1]
The average monthly solar radiation level in Helena, OK, of 5.71 kilowatt hours per square meter per day (kWh/m2/day) is approximately 45% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 14% 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 Helena 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 Helena, OK at this current time.
Monthly AC solar system output averages for Helena (ok). Month-by-month solar power, as ranked by AC output, in Helena. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Helena (OK) has a average annual solar AC output value of 6404.83 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Helena is August with an average of 588.74 kWhac, followed by July at 582.18 kWhac and September at 570.41 kWhac. [2]
The three months that historically average the lowest average solar output levels in Helena (Oklahoma) are December with an average of 446.06 kWhac, followed by February with an average of 474.13 kWhac and January at 482.81 kWhac. [2]
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The town of Helena, OK in Alfalfa County has an approximate population of 1,403. [6]
To learn more about solar energy and solar power Helena, OK, or for more solar-related resources for Helena, visit the U.S. Energy Information Administration.
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