Enhancing the lifetime prediction methodology for photovoltaic modules based on electronic packaging experience

Photovoltaic modules as well as automotive electronics are both designed to perform more than 20 years in the field. They show many similarities, for example the material combinations (Silicon, copper, lead free interconnection), the field loads, qualification tests, etc. Therefore knowledge obtained from designing automotive electronics can be used to design reliable photovoltaic modules. In the recent years many lifetime prediction methods have been developed to address a variety of different damage mechanisms observed in the field such as crack growth, delamination etc. by simulation. The paper describes various aspects of how the experiences gained in this field of research can be transferred to photovoltaic modules. In order to show a first application of the discussed issues, selected optimization measures on the basis of numerical results for photovoltaic modules on tabber stringer technology will be presented.