Calculateur d'Angle de Panneau Solaire Gratuit
Trouvez l'angle d'inclinaison optimal pour vos panneaux solaires. Maximisez la production selon votre latitude et la saison.
Optimal Annual Tilt
37.9 °
Optimal Annual Tilt vs Latitude
Formule
Optimal Solar Panel Tilt Angle
The ideal tilt angle for solar panels depends primarily on latitude. Panels should face the equator (south in the Northern Hemisphere) at a tilt that maximizes annual energy capture.
Formula
Optimal Tilt = Latitude x 0.87 + 3.1°
This regression approximation works well for latitudes between 25° and 55°. Steepen by 15° in winter and flatten by 15° in summer for seasonal optimization. Adjustable mounts that change tilt seasonally can gain 5-10% more annual energy.
Exemple Résolu
Solar panels at 40°N latitude.
- 01Optimal annual tilt = 40 x 0.87 + 3.1 = 37.9°
- 02Winter tilt = 37.9 + 15 = 52.9°
- 03Summer tilt = 37.9 - 15 = 22.9°
Questions Fréquentes
Should panels face due south?
In the Northern Hemisphere, yes. An azimuth of 180° (true south) maximizes energy. West-facing panels produce more afternoon energy, which may align better with peak pricing.
Does flat or vertical work?
Flat panels (0°) collect well in summer but poorly in winter. Vertical panels (90°) are poor overall but can work on building facades. The optimal angle balances all seasons.
How much does wrong tilt cost?
Being 10° off optimal typically reduces annual output by 1-3%. Being 30° off can reduce output by 10-15%, so approximate angles still work reasonably well.