See the chart below to see how different types of solar panel installations compare in Kapaa.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Kapaa, HI data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Kapaa. [1]
Kapaa has an average monthly Global Horizontal Irradiance (GHI) of 4.96 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 22% greater than the average monthly Direct Normal Irradiance (DNI) of 4.08 kWh/m2/day. [1]
Solar installations in Kapaa that are always titled at the latitude of Kapaa (Average Tilt at Latitude or ATaL) average 5.19 kWh/m2/day, or about 5% greater than the average monthly GHI of 4.96 kWh/m2/day and approximately 27% greater than the average monthly DNI of 4.08 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 Kapaa.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Kapaa, HI has a average annual solar radiation value of 4.66 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Kapaa is September with an average of 5.07 kWh/m2/day, followed by August at 4.96 kWh/m2/day and October at 4.76 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Kapaa (Hawaii) are November with an average of 4.42 kWh/m2/day, followed by June with an average of 4.45 kWh/m2/day and December at 4.48 kWh/m2/day. [1]
The average monthly solar radiation level in Kapaa, HI, of 4.66 kilowatt hours per square meter per day (kWh/m2/day) is approximately 19% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 30% 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 Kapaa 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 Kapaa, HI at this current time.
Monthly AC solar system output averages for Kapaa (hi). Month-by-month solar power, as ranked by AC output, in Kapaa. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Kapaa (HI) has a average annual solar AC output value of 5286.09 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Kapaa is August with an average of 475.01 kWhac, followed by September at 468.53 kWhac and October at 459.02 kWhac. [2]
The three months that historically average the lowest average solar output levels in Kapaa (Hawaii) are February with an average of 410.5 kWhac, followed by November with an average of 410.61 kWhac and June at 412.79 kWhac. [2]
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The city of Kapaa, HI in Kauai County has an approximate population of 10,699. [6]
To learn more about solar energy and solar power Kapaa, HI, or for more solar-related resources for Kapaa, 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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