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Definition of the Euro Efficiency of Solar Modules
H. te Heesen, M. Baron, C. Kurz, R. Pfatischer
Performance, Photovoltaic (PV) Module, Inverter
Components for PV Systems
Subtopic: PV Modules
Event: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain
Session: 4AV.3.61
4154 - 4155
ISBN: 3-936338-26-4
Paper DOI: 10.4229/25thEUPVSEC2010-4AV.3.61
0,00 EUR
Document(s): paper


The Euro-eta or Euro efficiency [1] is a main performance criterion for inverters. A comparable ratio for solar modules has not been established yet. Litzenburger has suggested a first definition of a Euro-eta value for modules [2] taking the solar irradiance into account. We have enhanced his idea to determine the performance of PV modules depending both on irradiance and module temperature. We present a first suggestion for a weight matrix to calculate the Euro-eta of solar modules taking irradiance as well as temperature effects into account. We have validated our definition by analyzing monitoring data of PV plants to verify our matrix. The Euro-eta definition will be useful e. g. for cost comparisons of solar modules. Currently, the performance of inverters can be compared directly using the Euroeta. Thus, different cost models can be set up based on the Euro-eta value. Furthermore, the Euro efficiency definition allows an independent comparison of the performance of solar modules.