howmuchsun

Solar panel angles in Portugal

Optimal fixed-panel tilt and orientation for 3 cities in Portugal, computed from solar geometry.

CityLatitudeOptimal tiltFacingFlat roof keeps
Lisbon 38.73°N 33° south 87%
Porto 41.15°N 35° south 85%
Braga 41.55°N 36° south 85%

How these angles are calculated