Based on historical Federal Way, 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 Federal Way.[1]
Federal Way has an average monthly Global Horizontal Irradiance (GHI) of 3.47 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 4% greater than the average monthly Direct Normal Irradiance (DNI) of 3.33 kWh/m2/day. [1]
Solar installations in Federal Way that are always titled at the latitude of Federal Way (Average Tilt at Latitude or ATaL) average 3.97 kWh/m2/day, or about 14% greater than the average monthly GHI of 3.47 kWh/m2/day and approximately 19% greater than the average monthly DNI of 3.33 kWh/m2/day. [1]
Solar Energy Glossary
Global Horizontal Irradiance (GHI)
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 (DNI)
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 (ATaL)
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.
Solar Radiation Levels in Federal Way
Solar Radiation Data in Federal Way, WA
See the chart below for monthly solar radiation levels in Federal Way.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Federal Way, WA
Federal Way, WA has a average annual solar radiation value of 4.03 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Federal Way is August with an average of 6.19 kWh/m2/day, followed by July at 6.13 kWh/m2/day and May at 5.45 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Federal Way (Washington) are December with an average of 1.72 kWh/m2/day, followed by January with an average of 1.87 kWh/m2/day and November at 2.2 kWh/m2/day. [1]
Solar Power Comparison: Federal Way vs. the U.S.
Solar Power Levels in Federal Way
The average monthly solar radiation level in Federal Way, WA, of 4.03 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).
Solar Power: Federal Way vs. the U.S.
Below is a month-by-month comparison of how average Federal Way 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 Federal Way, WA at this current time.
Solar Power Output in Federal Way
The Power of Solar in Federal Way, WA
Monthly AC solar system output averages for Federal Way (wa). Month-by-month solar power, as ranked by AC output, in Federal Way. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Federal Way, WA
Federal Way (WA) has a average annual solar AC output value of 4506.79 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Federal Way is August with an average of 566.09 kWhac, followed by July at 559.76 kWhac and May at 513.08 kWhac. [2]
The three months that historically average the lowest average solar output levels in Federal Way (Washington) are December with an average of 173.41 kWhac, followed by January with an average of 185.82 kWhac and November at 211.87 kWhac. [2]
Cost of Utilities in Federal Way
Federal Way Electricity Costs
Sorry, Federal Way residential electricity prices are currently unavailable.
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Solar Power Poll: Federal Way
Vote now: Given all of the data and analysis provided for Federal Way, is solar power a good choice for residents of this city?
Federal Way Natural Gas Costs
Sorry, Washington residential natural gas prices are currently unavailable.
The city of Federal Way, WA in King County has an approximate population of 89,306. [6]
Federal Way, WA Solar Energy
To learn more about solar energy and solar power Federal Way, WA, or for more solar-related resources for Federal Way, visit the U.S. Energy Information Administration.
Did you know?
The largest solar power plant in the world covers 1000 acres & is located in the Mojave Desert in California.
