Intensity of solar radiation

This is the intensity of solar radiation which should be taken as 1000 W/m2 for most latitudes. It is recommended that the local value should be obtained where possible which can be calculated with our solar radiation tool.

According to ERA Report No 88-0108, in clear atmosphere the maximum solar received by a vertical tube is 725 W/m2 and occurs when the altitude of the sun is approximately 32°.