Ulrike Jahn graduated in physics and leads various R&D projects in the Division Power Plants and Systems of VDE Renewables in Alzenau, Bavaria, Germany. Her work focuses on quality assessment of PV and wind projects. She is project manager of an international expert group, Task 13 of the PVPS programme of the International Energy Agency (IEA), dealing with technical and financial issues of PV performance and quality. She coordinates this network of 60 international experts in 23 countries in their joint efforts to assess and improve the performance, operation and reliability of PV systems over their lifetime. Since 2018, Ulrike is a Member of the Steering Committee of the European Technology and Innovation Platform for Photovoltaics (ETIP PV).