Germany’s paxos has partnered with the TH Köln University of Applied Sciences to develop a solar roof tile that could be used to generate electricity and heat at the same time.
The photovoltaic-thermal (PVT) tile’s appearance barely differs from conventional roof tiles, which could make them attractive for homeowners. Paxos and TH Köln fabricated a tile prototype to test its temperature, walkability, high resistance to environmental influences, and safety. They also analyzed the glass to minimize optical losses through reflection or scattering.
They tested the prototype in a testing facility equipped with microinverters and an air heat pump.
“Thanks to the adjustments we made to the actual roof tile, the physical properties and also the energy yield have been significantly improved. The system was thus ready for continuous use under real conditions,” explained Christian Dick, project manager at TH Köln.
The solar system preheats air for the coupled air heat pump. Image: Costa Belibasakis/TH Köln
Performance tests started under real conditions in October. The system shows comparable values in terms of electrical performance as a reference system with conventional, elevated solar modules.
