Stefan Dauwe is Director of Products and Projects at h.a.l.m. elektronik GmhH, Germany, world market leader in the performance testing of solar cells and modules in production and R&D. He has more than 20 years of experience in crystalline silicon PV. In 2014 he joined h.a.l.m. after working at Ersol Solar Energy AG (later Bosch Solar Energy AG), Schott Solar AG and Institute for Solar Energy Research Hamelin (ISFH). He received the Diploma in physics from University of Heidelberg, Germany, in 1997 and the Ph.D. degree from University of Hanover, Germany, in 2004.