Denmark has reached 790 MW in late 2015 with the vast majority of this capacity installed in just four years. The goal for the Danish Photovoltaic energy sector is to have 1000 MW by 2020
and 3400 MW by 2030. This thesis is part of the the research project Fully Automated Service Execution platform for Photovoltaic power plants (FASE) financed by Innovation Fund Denmark
and developed in collaboration with Danica Pension, Econ GmbH, GreenGo Energy A/S and DTU Compute Technical University of Denmark. The projects vision is to significantly improve the
profitability of PV Plants by integrating state-of-the-art PV fault diagnosis with an automatic service execution platform. The main challenges addressed in this master thesis is developing the necessary
PV performance models for fault diagnosis in thin-film based PV plants.