Dr. Wohlgemuth joined the National Renewable Energy Laboratory as Principle Scientist in PV Reliability in 2010. He is responsible for establishing and conducting research programs to improve the reliability and safety of PV modules. Before joining NREL he worked at Solarex/BP Solar for more than 30 years. His PV experience includes cell processing and modeling, Si casting, module materials and reliability, and PV performance and standards. Dr. Wohlgemuth has been an active member of working group 2 (WG2), the module working group within TC-82, the IEC Technical Committee on PV since 1986 and has been convenor of the group for more than 10 years. Dr. Wohlgemuth is a member of the Steering Committee for International PV Module QA Forum and he chairs Task Group 3 on Humidity, Temperature and Voltage. Dr. John Wohlgemuth earned a Ph.D. in Solid State Physics from Rensselaer Polytechnic Institute.