Advertising
Solar Radiation
Map of Germany showing the highest recorded levels of solar radiation per year.
Map of Germany showing the highest recorded levels of solar radiation per year.

Solar radiation (also called insolation) consists of the radiation that comes directly from the sun as well as the radiation that comes indirectly. Indirect Radiation includes: 1) the reflected radiation of an area, particularly strongly reflected radiation, i.e. areas covered by snow, 2) the radiation from the blue sky, and 3) other diffuse radiation. For the exact computation of the amount of energy which falls on a particular area, the angle of incidence between the solar radiation and the area is decisive. This changes with the time of day and year. The solar radiation is also reduced by numerous factors; even with a clear blue sky, only 90 % of the total solar radiation gets through.

Further information

Page: 26 of 38