See the chart below to see how different types of solar panel installations compare in Index.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Index, WA data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Index. [1]
Index has an average monthly Global Horizontal Irradiance (GHI) of 3.12 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 8% greater than the average monthly Direct Normal Irradiance (DNI) of 2.89 kWh/m2/day. [1]
Solar installations in Index that are always titled at the latitude of Index (Average Tilt at Latitude or ATaL) average 3.58 kWh/m2/day, or about 15% greater than the average monthly GHI of 3.12 kWh/m2/day and approximately 24% greater than the average monthly DNI of 2.89 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 Index.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Index, WA has a average annual solar radiation value of 3.61 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Index is July with an average of 5.84 kWh/m2/day, followed by August at 5.65 kWh/m2/day and September at 4.86 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Index (Washington) are January with an average of 1.75 kWh/m2/day, followed by December with an average of 1.77 kWh/m2/day and November at 1.86 kWh/m2/day. [1]
The average monthly solar radiation level in Index, WA, of 3.61 kilowatt hours per square meter per day (kWh/m2/day) is approximately 8% less than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 45% 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 Index 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 Index, WA at this current time.
Monthly AC solar system output averages for Index (wa). Month-by-month solar power, as ranked by AC output, in Index. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Index (WA) has a average annual solar AC output value of 4064.41 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Index is July with an average of 536.77 kWhac, followed by August at 519.04 kWhac and May at 453.89 kWhac. [2]
The three months that historically average the lowest average solar output levels in Index (Washington) are January with an average of 175.6 kWhac, followed by December with an average of 178.36 kWhac and November at 180.65 kWhac. [2]
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The town of Index, WA in Snohomish County has an approximate population of 178. [6]
To learn more about solar energy and solar power Index, WA, or for more solar-related resources for Index, visit the U.S. Energy Information Administration.
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