Solar Panel Angle in Philadelphia

Solar Panel Recommendations for Philadelphia

• Fixed mount: Set your panels at 37.9° tilt, facing South (180° azimuth).
• Seasonal adjustment: Tilt to 25.0° in summer and 55.0° in winter for up to 15% more annual energy.
• Monthly adjustment: Adjust tilt each month using the table above for maximum year-round production.

Solar Energy Potential in Philadelphia

Philadelphia receives approximately 4 peak sun hours daily, consistent with its mid-Atlantic latitude of 40°N. The climate produces four distinct seasons with hot, humid summers and cold, partly cloudy winters. The region's solar resource is moderate — comparable to successful solar markets in Europe — but sufficient for cost-effective residential systems when state and federal incentives are applied.

PECO offers net metering for Philadelphia solar customers, and Pennsylvania has a solar Alternative Energy Portfolio Standard (AEPS) that creates some market support. The state's solar policies are less aggressive than neighboring New Jersey and New York, which means Philadelphia solar payback periods (typically 10-14 years) are longer than in markets with stronger incentives.

Philadelphia's older housing stock includes many rowhomes and historic properties with limited roof space for solar. However, the city's suburban areas have ample single-family homes with suitable roofs. The region's flat terrain near the coast means minimal terrain-based shading, though tree cover in established neighborhoods should be evaluated. Pennsylvania's electricity rates are above the national average, which improves solar savings.

Orientation Performance

Panel orientation significantly affects energy production. The table below shows relative output compared to true south-facing panels:

Frequently Asked Questions

Related Calculators