Based on historical Bethlehem, PA data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Bethlehem.[1]
Bethlehem has an average monthly Global Horizontal Irradiance (GHI) of 3.91 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 6% greater than the average monthly Direct Normal Irradiance (DNI) of 3.7 kWh/m2/day. [1]
Solar installations in Bethlehem that are always titled at the latitude of Bethlehem (Average Tilt at Latitude or ATaL) average 4.55 kWh/m2/day, or about 16% greater than the average monthly GHI of 3.91 kWh/m2/day and approximately 23% greater than the average monthly DNI of 3.7 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 Bethlehem
Solar Radiation Data in Bethlehem, PA
See the chart below for monthly solar radiation levels in Bethlehem.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Bethlehem, PA
Bethlehem, PA has a average annual solar radiation value of 4.72 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Bethlehem is July with an average of 5.71 kWh/m2/day, followed by August at 5.58 kWh/m2/day and June at 5.48 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Bethlehem (Pennsylvania) are December with an average of 3.15 kWh/m2/day, followed by January with an average of 3.58 kWh/m2/day and November at 3.85 kWh/m2/day. [1]
Solar Power Comparison: Bethlehem vs. the U.S.
Solar Power Levels in Bethlehem
The average monthly solar radiation level in Bethlehem, PA, of 4.72 kilowatt hours per square meter per day (kWh/m2/day) is approximately 20% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 29% 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: Bethlehem vs. the U.S.
Below is a month-by-month comparison of how average Bethlehem 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 Bethlehem, PA at this current time.
Solar Power Output in Bethlehem
The Power of Solar in Bethlehem, PA
Monthly AC solar system output averages for Bethlehem (pa). Month-by-month solar power, as ranked by AC output, in Bethlehem. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Bethlehem, PA
Bethlehem (PA) has a average annual solar AC output value of 5248.4 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Bethlehem is July with an average of 511.95 kWhac, followed by May at 502.1 kWhac and August at 498.56 kWhac. [2]
The three months that historically average the lowest average solar output levels in Bethlehem (Pennsylvania) are December with an average of 317.52 kWhac, followed by November with an average of 364.54 kWhac and January at 365.26 kWhac. [2]
Cost of Utilities in Bethlehem
Bethlehem Electricity Costs
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Solar Power Poll: Bethlehem
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Bethlehem Natural Gas Costs
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Gentle Breeze: 9 mps NNE
Precip.: Chance of Rain
Humidity: 99%
Cloud cover: 100%
More about Bethlehem
About Bethlehem
The city of Bethlehem, PA in Northampton County has an approximate population of 74,982. [6]
Bethlehem, PA Solar Energy
To learn more about solar energy and solar power Bethlehem, PA, or for more solar-related resources for Bethlehem, visit the U.S. Energy Information Administration.
Did you know?
It takes light about 8 minutes, 19 seconds to travel the 93,000,000 miles from the sun's surface to us on Earth.