Solar Panel Angle Calculator
Find the optimal tilt angle for solar panels based on your latitude and season.
Inputs
°
Results
Optimal Tilt
40°
Azimuth (Facing)180°
Annual Average Tilt40°
Efficiency at Optimal100%
Efficiency if Flat77%
How to Use This Calculator
- Enter your site latitude in degrees.
- The calculator returns the optimal fixed tilt angle for maximum annual energy yield.
- Review the seasonal adjustments — steeper in winter, shallower in summer.
- Flat or low-tilt roofs can use ballasted racking to achieve a closer-to-optimal angle.
- Self-cleaning from rainfall requires a minimum tilt of 10–15 degrees.
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