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Yield of Small Roof-Top PV Systems in Germany 2017
H. te Heesen, V. Herbort, M. Rumpler
Monitoring, Rooftop, System Performance
PV Systems - Performance, Applications and Integration
Subtopic: Operation, Performance and Maintenance of PV Systems
Event: 35th European Photovoltaic Solar Energy Conference and Exhibition
Session: 6DV.1.43
2066 - 2068
ISBN: 3-936338-50-7
Paper DOI: 10.4229/35thEUPVSEC20182018-6DV.1.43
0,00 EUR
Document(s): paper


We provide an analysis of public yield data of more than 23,000 photovoltaic systems with a capacity up to 30 kWp in Germany for 2017. We have used daily yield data including the configuration of the PV systems. We have aggregated the yield data to monthly values. The data have been cleansed by a two-step algorithm to consider only PV systems without any malfunction in this time period. The evaluation of the yield represents the energy production of small PV systems in Germany. 2017 was a below average year for photovoltaic systems in Germany. The yield in 2017 was about three percent smaller compared to the reference period from 2012 to 2016. The specific yield in June was larger than in previous years, the other months show a specific yield which is just in the final third of longterm monthly yield values. The highest specific yield of more than 1,100 kWh/kWp was observed in the southwestern part of Germany. In contrast, the yield in Lower Saxony is the smallest one with just 900 to 950 kWh/kWp. The regional spread of the energy yield is large compared to the previous years. The analysis in this study is based on statistical methods and algorithms. Therefore, the results are objectively verifiable and have no subjective influence. The significance analysis shows that the statistical results will reflect the real income of the solar systems very well if a sufficiently large number of PV systems is evaluated.