Example of a Photovoltaic Wall System
A photovoltaic system with six modules, inverter, power storage and wall box, attached vertically to a house wall. This was put into operation in August 2024 in the south of Bavaria, Germany. The house wall is facing south-southwest, more precisely in the direction of 212 degrees. Its main yield is therefore from midday to evening, thus complementing the roof system on the same house facing east-southeast. The system consists of the following components:
• 6 Meyer Burger Glass 380 Wp modules, total 2.28 kWp
• SMA Sunny Boy Smart Energy 3.6 kW, 1-phase hybrid inverter
• 2 SMA Home Storage batteries 3.28 kWh, power storage based on lithium iron phosphate, total 6.56 kWh
• SMA Sunny Home Manager 2.0
• SMA Wallbox EV Charger 7.4 kW with 7.5 meter charging cable
The system was installed by BayWa Haustechnik using the company's own mounting system.
The yield data will be published here from September 2025, when the system has been running for a full year.
The wall system made up of six modules on a private house, in mid-August around 12 o'clock summer time, i.e. 11 a.m. standard time. The wall box hangs on the other wall to the right, and you can see a small part of the roof system on top of the roof.
Inverter and storage of the wall system in the basement. The Home Manager is in an adjoining room, next to the inverter of the roof system. Bottom left is a Fritz! Powerline 1260, which supplies the system with LAN. Another option would be a long LAN cable, which would be ideal if it can be installed sensibly. Internet access for this system could also have been arranged with WLAN repeaters if they have a LAN output at the end.
The lowest point, the lower edge of the storage, is about 80 centimeters above the basement floor. This is for safety in the not completely impossible case of water flowing in, despite the non-return valve being installed in the basement drain.
Small vertical photovoltaic systems are sometimes found as balcony power plants. In the private sector, however, larger vertical systems on the house wall are less common than sloping systems on the roof. The expected electricity yield from vertical wall systems is generally lower than that of roof systems. Therefore, they are mainly built when there is either already one on the roof or it is not possible to build it there. Apart from the disadvantage of the lower average yield, there are also advantages. The vertical system has its strengths in winter, when the sun is low and roof systems have a low yield. In addition, no snow remains on the wall, which is quite relevant in snowy areas, such as here in the Allgäu.
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