Largest PVT Caport system in Germany
A carport system with 640 PRISMA® PVT 4.0 modules and an additional 324 PV modules was built on the IKEA car park in Berlin-Waltersdorf. This mixed system went into operation in May 2025.
North-east orientation
Inclination: 15 degrees
Modules: 324 PV and 160 PRISMA® PVT 4.0 modules á 450 Wp
South-west orientation
Inclination: 15 degrees
Modules: 480 Prisma® PVT 4.0 modules á 450 Wp
Total output: 432 kilowatts
Germany's largest PVT system for the regeneration of a borehole field
Probe field regeneration
With the installation of PRISMA® PVT modules on a carport system at the IKEA site in Berlin-Waltersdorf, Germany's currently largest PVT system for regenerating a geothermal probe field (200 boreholes, each 100 metres deep) has been created. The aim of the project is to sustainably support the large heat pump on site through active heat input into the ground, while at the same time optimising the electricity yield.
Efficient geothermal probe regeneration, higher coefficient of performance
The regenerative system is based on the principle of thermal equalisation: during the heating season, the heat pump extracts energy from the ground - in summer, the PRISMA® PVT collectors return heat in a targeted manner. This prevents the borehole field from cooling down. In the transitional period, the additional source heat improves the source temperature - and therefore the efficiency of the heat pump. The result: an increased seasonal performance factor and reduced requirements for the number and depth of probes.
Double utilisation, reduced costs
The hybrid system impresses with its dual utilisation: it supplies electricity and heat at the same time - and reduces material and installation costs by sharing the substructure, cabling and pipework. The active cooling of the modules also helps to optimise yields: The electrical efficiency remains stable even in summer - for maximum overall yield.
Lighthouse project for integrated energy supply
The project was planned by INP Ingenieure GmbH (Leipzig) and realised by solarSTEP Energie GmbH (Königstein im Taunus). For IKEA, it is the first of a total of 54 planned charging parks in Germany. The integration of PRISMA® PVT technology marks an innovative step towards cross-sector energy supply - and serves as a valuable reference for future-orientated large-scale projects with renewable energy systems.
All images shown on this page with the kind permission of
solarSTEP Energie Gmbh.
