The heat radiation of solar modules is invisible to the human eye. The heat radiation is made visible with the aid of the thermo graphic process (IR). A special thermal imaging camera (infrared camera) generates images of the heat radiation of a solar module and shows whether the temperature is evenly distributed in the solar module.

If there is locally increased heating in the module, for example at the cell or at the contact, then there is an increased resistance from an electrical point of view. As a result, a larger proportion of the current is no longer fed into the grid at this point, but is converted into unwanted heat. This is also referred to as the hot spot.

PVS-Beer uses an IR camera from the quality manufacturer Fluke.

Picture: Hot spot visualization by thermography

Picture: IR measurement of lightning damage