An extension of the active system, the combi system also uses thermal collector panels on the roof and a storage tank located away from the panels. In this system, the storage tank is divided into sections by heat exchangers.

Through a sophisticated pump and controller, hot water is available for the household supply, but also for other requirements – heating a swimming pool or central heating, for example.


  • All systems integrate a supplementary heat source – electricity, gas or oil – for times when the skies are overcast, with reduced solar penetration.