Progress Update: Task Group 2
Task Group 2 is focused on thermal and mechanical fatigue.
Failures of cell interconnects and solder bonds have been identified as a key cause of long-term failure of PV modules. The primary stresses affecting the failure rates have been shown to be thermal and mechanical. This task group will study how to induce and quantify these failures.
There is a consensus that 200 thermal cycles do not adequately stress a module, so discussion has focused on how to increase the amount of stress without extending the test for a prolonged time. Dynamic mechanical load and faster cycling are two options that have been discussed. A draft is in progress.
Nick Bosco— National Renewable Energy Laboratory, representing the Americas
Tadanori Tanahashi — Espec, representing Japan
Volunteers representing other parts of the world are welcomed.