howmuchsun

Solar panel angles, by city

The angle that collects the most sunlight over a year depends on your latitude, and it is not the one the rule of thumb gives you. More usefully: it barely matters. Which way your roof faces matters enormously.

1,233 cities across 237 countries, each with its optimal tilt and orientation, seasonal angles, and a score for every roof.

The short version

Browse by country