Featured in The turning point – 05-2011

Breaking point: soldered joints

Invisible quality: In the course of production, most crystalline module manufacturers solder cells to one another. This is an aspect that they share in common. However, the differences lie in how this soldering process takes place. And how that affects quality can even be determined under certain circumstances by researchers based on the amount of crackling.

Every time Harry Wirth enters his test laboratory he puts on a white smock because dust can jeopardize his work. Together with his staff at Fraunhofer Institute for Solar Energy Systems (ISE) the physicist tries to improve the production of solar modules. However, dust is probably one of the lesser challenges. Instead soldering the individual …

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