Calculate the optimal solar panel direction by your location
Positive = North, Negative = South
Positive = East, Negative = West
Optimal Azimuth
180°
Due South
Optimal Tilt Angle
40°
Hemisphere
Northern
☀️ Summer (Jun-Aug)
—
Tilt: —
🍂 Equinox (Mar/Sep)
—
Tilt: —
❄️ Winter (Dec-Feb)
—
Tilt: —
Solar Noon Altitude (Equinox)
—
Solar Noon Altitude (Summer Solstice)
—
Solar Noon Altitude (Winter Solstice)
—
Annual Solar Irradiance Factor
—
The optimal azimuth angle for solar panels is generally 180° (due south) in the Northern Hemisphere and 0° (due north) in the Southern Hemisphere. However, the exact optimal direction depends on your latitude, local climate patterns, and whether you want to maximize morning or afternoon energy production.
Latitude determines the sun's path across the sky throughout the year. At the equator, panels can be nearly flat and face either direction. As latitude increases, panels must be tilted more steeply and should face toward the equator (south in Northern Hemisphere, north in Southern Hemisphere). The optimal tilt angle is approximately equal to your latitude for year-round production.
South-facing panels (in the Northern Hemisphere) produce the most total energy annually. However, east-west orientations can be beneficial in areas with time-of-use electricity rates, as they spread production across morning and afternoon peaks. Some systems use a combination of orientations to balance output throughout the day.