Solarific

Solar panel data for all U.S. cities

Solar Panel Angles for Allentown, Pennsylvania

The most efficient tilt for photovoltaic panels in Allentown, Pennsylvania at a latitude of 40.6°:

Orientation

Your photovoltaic panels need to be angled facing south.

Fixed tilt

If you're mounting the photovoltaic panels at a stationary angle, such as on your roof, the most efficient angle is 34°.

2-Season tilt

If you're planning to change the angle of your photovoltaic panels twice per year, the most efficient angle is 16.8° in summer months and 54.7° in winter months.

4-Season tilt

If you're planning to change the angle of your photovoltaic panels each season, the most efficient angle is 13° in summer months and 60.1° in winter months, and 37.5° in autumn and spring months.