Due to the large number of PV systems erected in Germany in various size categories in recent years, the need for reliable key figures for yield valuation has increased. Owners and operators of photovoltaic systems need reference values in order to evaluate the annual and monthly electricity production of their systems, so that conclusions can be drawn about the quality of the PV system. Only systems that are built to a high standard of quality during the planning and construction phases and that have been continuously serviced and maintained since commissioning can fully exploit their technical potential. For investors and operators of photovoltaic systems, the long-term operating phase therefore focuses on the question of whether their PV system achieves the maximum possible energy yield or whether there has been a loss of yield due to technical faults.
For this reason, we have initiated this yield study in order to provide investors and operators of photovoltaic systems with a solid basis for comparing and analysing the energy yields of their PV systems.
The yield study is available for download for the following calendar years:
↦ Performance of roof-top PV systems in Germany from 2012 to 2018. Solar Energy 194 (2019) 128–135
The algorithm used in the yield study for multi-level data cleansing is described in the following publication:
H. te Heesen, V. Herbort. Development of an Algorithm to Analyze the Yield of Photovoltaic Systems. Renewable Energy. Volume 87, Part 2, March 2016, Pages 1016-1022. DOI: 10.1016/j.renene.2015.07.058
If you have any questions or suggestions regarding the yield study, please contact us by e-mail (h.teheesen(at)umwelt-campus.de).
The following scripts are available to download the solar radiation into the horizontal plane via the CAMS Radiation Service and to convert it into the inclined module plane:
As part of the research on yield data analysis of photovoltaic systems, there are ongoing topics for project and thesis work.
If you are interested in joining the project, please send a mail to Prof. te Heesen.