The map shows the anticipated availability of solar
energy on a horizontal surface per year (so-called
global radiation) in kWh/m²a.
The total global radiation over the area of Switzerland
is 50'000 TWh per year, corresponding to an
average power of 5'700 GW.
In principle, every part of Switzerland is suitable
for decentrally exploiting solar energy. The middle
and southern Alpine regions, especially the Valais
Alps and the Upper Engadine, exhibit a particularly
high availability of energy. This brings the production
of solar energy closer to rentability compared to
the other regions.