Gabi Friesen is a physicist with more than 20 years of experience in the field of photovoltaics. She is an expert in PV module testing and energy yield predictions. She has collaborated in various European and national R&D projects and participated at various international measurement and modeling inter-comparisons. She is today project leader of a national project dealing with quality assurance and PV system reliability and is coordinating one of the IEA Task 13 sub-tasks dealing with the analysis of module energy yield data from different climates. Within the accredited ISO 17025 laboratory of SUPSI she is responsible for different testing activities. She is author or co-author of more than 50 scientific publications.