The month of July has the highest historical solar radition values in Philadelphia with an average of 5.75 kWh/m2/day. [More]
Solar Panels in Philadelphia
Solar panels in Philadelphia that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]
Sunrise & Sunset in Philadelphia
The total length of the day in Philadelphia, PA today (April 19, 2024) will be 13 hours and 30 minutes. [More]
Solar Power in Philadelphia, PA
Solar Energy Data in Philadelphia, PA
See the chart below to see how different types of solar panel installations compare in Philadelphia.
Based on historical Philadelphia, 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 Philadelphia.[1]
Philadelphia has an average monthly Global Horizontal Irradiance (GHI) of 4.02 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 2% greater than the average monthly Direct Normal Irradiance (DNI) of 3.95 kWh/m2/day. [1]
Solar installations in Philadelphia that are always titled at the latitude of Philadelphia (Average Tilt at Latitude or ATaL) average 4.72 kWh/m2/day, or about 17% greater than the average monthly GHI of 4.02 kWh/m2/day and approximately 19% greater than the average monthly DNI of 3.95 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 Philadelphia
Solar Radiation Data in Philadelphia, PA
See the chart below for monthly solar radiation levels in Philadelphia.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Philadelphia, PA
Philadelphia, PA has a average annual solar radiation value of 4.93 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Philadelphia is July with an average of 5.75 kWh/m2/day, followed by June at 5.59 kWh/m2/day and August at 5.59 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Philadelphia (Pennsylvania) are December with an average of 3.44 kWh/m2/day, followed by January with an average of 4.02 kWh/m2/day and November at 4.16 kWh/m2/day. [1]
Solar Power Comparison: Philadelphia vs. the U.S.
Solar Power Levels in Philadelphia
The average monthly solar radiation level in Philadelphia, PA, of 4.93 kilowatt hours per square meter per day (kWh/m2/day) is approximately 25% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 25% 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: Philadelphia vs. the U.S.
Below is a month-by-month comparison of how average Philadelphia 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 Philadelphia, PA at this current time.
Solar Power Output in Philadelphia
The Power of Solar in Philadelphia, PA
Monthly AC solar system output averages for Philadelphia (pa). Month-by-month solar power, as ranked by AC output, in Philadelphia. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Philadelphia, PA
Philadelphia (PA) has a average annual solar AC output value of 5576.09 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Philadelphia is July with an average of 526.9 kWhac, followed by April at 518.89 kWhac and August at 513.7 kWhac. [2]
The three months that historically average the lowest average solar output levels in Philadelphia (Pennsylvania) are December with an average of 350.09 kWhac, followed by November with an average of 395.67 kWhac and January at 410.32 kWhac. [2]
Cost of Utilities in Philadelphia
Philadelphia Electricity Costs
Sorry, Philadelphia residential electricity prices are currently unavailable.
Please check back later.
Solar Power Poll: Philadelphia
Vote now: Given all of the data and analysis provided for Philadelphia, is solar power a good choice for residents of this city?
Philadelphia Natural Gas Costs
Sorry, Pennsylvania residential natural gas prices are currently unavailable.
The city of Philadelphia, PA in Philadelphia County has an approximate population of 1,526,006. [6]
Philadelphia, PA Solar Energy
To learn more about solar energy and solar power Philadelphia, PA, or for more solar-related resources for Philadelphia, visit the U.S. Energy Information Administration.
Did you know?
About half of the sun's energy is absorbed by the Earth's surface; about 30 percent is reflected back from the surface.
