Solarific

Solar panel data for all U.S. cities

Solar Panel Angles for Billings, Montana

The most efficient tilt for photovoltaic panels in Billings, Montana at a latitude of 45.79°:

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 37.9°.

2-Season tilt

If you're planning to change the angle of your photovoltaic panels twice per year, the most efficient angle is 21.6° in summer months and 59.3° 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 17.8° in summer months and 64.8° in winter months, and 42.6° in autumn and spring months.