Solar Panel Angles for Boston, Massachusetts

The most efficient tilt for photovoltaic panels in Boston, Massachusetts at a latitude of 42.32°:

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 35.3°.

2-Season tilt

If you're planning to change the angle of your photovoltaic panels twice per year, the most efficient angle is 18.4° in summer months and 56.2° 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 14.6° in summer months and 61.7° in winter months, and 39.2° in autumn and spring months.