Germany's actual number of balcony PV systems may have already exceeded 3 million units.
Release Time:
2025-12-08
Germany's actual number of balcony PV systems may have already exceeded 3 million units.
The German ZSW Institute, commissioned by the German Federal Environment Agency, conducted a statistical study on the current status of plug-in photovoltaic systems in Germany—commonly known as balcony PV systems. The findings reveal that, as of the end of 2024, Germany already has approximately 3 million plug-in PV systems installed, though only a small fraction of these are registered with the Federal Network Agency.
Total installed capacity and total number of plug-in photovoltaic systems in Germany from 2019 to 2024, source: ZSW ZSW has meticulously compiled plug-in photovoltaic data registered over the years at the Federal Network Agency, and conducted market research involving dozens of plug-in PV companies, associations, and market participants. These stakeholders were asked to independently assess the ratio of registered versus unregistered systems within the plug-in PV sector. Based on their collective evaluations, ZSW arrived at the aforementioned conclusion. 
The total and incremental rooftop photovoltaic capacity registered with the Federal Network Agency, source: ZSW In addition to the overall system capacity, ZSW also analyzed other current trends in Germany's plug-in photovoltaic market. For instance, in 2024, 10% of plug-in PV systems registered with the Federal Network Agency were equipped with energy storage (the proportion of systems with storage was even higher among those not yet registered). Among plug-in PV systems without storage, the most common rated power output ranged from 800 to 900W. In contrast, for plug-in PV systems fitted with storage, the rated power primarily clustered between 800–900W and 1600–2000W.
Power distribution of plug-in photovoltaic systems registered in 2024, Source: ZSW
Power distribution of plug-in photovoltaic systems with energy storage registered in 2024, Source: ZSW Among the plug-in photovoltaic systems installed from 2019 to 2023, the vast majority of PV modules were oriented toward the south, southeast, or southwest, with a slight tilt. Only just under 4% were integrated directly into building facades (Fassadenintegriert).
Photovoltaic module orientation in plug-in photovoltaic systems, Source: ZSW
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