Source google image: https://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/SolarGIS-Solar-map-World-map-en.png/1200px-SolarGIS-Solar-map-World-map-en.png
Panneau solaire w/m2
Source google image: https://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/SolarGIS-Solar-map-World-map-en.png/1200px-SolarGIS-Solar-map-World-map-en.png