Study on the Yield of Photovoltaic Systems in Germany

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 years:

⤓ Yield study PV roof-top systems 2020 (in German)

⤓ Yield study PV roof-top systems 2019 (in German)

⤓ Yield study PV roof-top systems 2018 (in German)

⤓ Yield study PV roof-top systems 2017 (in German)

⤓ Yield study PV roof-top systems 2016 (in German)

⤓ Yield study PV roof-top systems 2015 (in German)

⤓ Yield study PV roof-top systems 2014 (in German)

⤓ Yield study PV systems 2013 (in German)

⤓ Yield study PV systems 2012 (in German)

Scientific Publications

Wissenschaftliche Publikationen

J. Schardt, H. te Heesen. Performance of roof-top PV systems in selected European countries from 2012 to 2019. Solar Energy, 217, P. 235-244. June 2021. DOI: 10.1016/j.solener.2021.02.001

H. te Heesen, V. Herbort, M. Rumpler. Performance of roof-top PV systems in Germany from 2012 to 2018. Solar Energy 194 (2019) 128–135. DOI: 10.1016/j.solener.2019.10.019

H. te Heesen, V. Herbort, M. Rumpler. Untersuchung des Ertrags von Photovoltaikdachanlagen bis 30 kWp in Deutschland im Zeitraum 2014 bis 2017. S. 177-188. In: Christian Czarnecki, Carsten Brockmann, Eldar Sultanow, Agnes Koschmider, Annika Selzer (Hrsg.). GI-Edition Lecture Notes in Informatics. Workshops der INFORMATIK 2018 - Architekturen, Prozesse, Sicherheit und Nachhaltigkeit. Berlin. Sept. 2018

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).