howmuchsun

Solar panel angles in France

Optimal fixed-panel tilt and orientation for 4 cities in France, computed from solar geometry.

CityLatitudeOptimal tiltFacingFlat roof keeps
Paris 48.85°N 40° south 81%
Marseille 43.30°N 36° south 84%
Lyon 45.75°N 38° south 82%
Lille 50.63°N 41° south 80%

How these angles are calculated