Downloads: Spectra can be downloaded from the NREDC website at http://rredc.nrel.gov/solar/spectra/am1.5/ASTMG173/ASTMG173.html |
References- Definitions of the AM0, AM1.5 and many others from the National Department of Energy: http://rredc.nrel.gov/solar/spectra/ |
Defining standard spectra for solar panelsThe atmosphere does not just change the overall intensity, but the whole spectral distribution. For instance, most of the high-energy wavelengths that are present in the sun light are filtered out by the ozone layer. Generally, with longer paths through the atmosphere (at higher latitudes or around sunset), the larger the part of infrared light, the low energy spectrum. This filter effect can be expressed by a turbidity factor. In order to be able to compare solar modules, standard test conditions have been designed. These conditions include spectrum, intensity and temperature. The standard spectra refer to generic locations. They are prefixed “AM”, which stands for “Air Mass” and followed by a number, which refers to the length of the path through the atmosphere in relation to the shortest length if the sun was in the apex. It is roughly
|
|||||||||||||||||||||||||||||||||
|