New solar thermal panels end stagnation with unique, automated ‘temperature shutdown’ coating

World’s first “switching” absorber layer coating on the new Vitosol 200-FM solar thermal collector deflects heat when needed, preventing stagnation   Viessmann is bringing to the UK market a new solar thermal flat panel that ends the problem of overheating and stagnation and sets a new standard for solar system efficiency and reliability. The Viessmann Vitosol 200-FM collector features ThermProtect, a patented "intelligent" absorber layer coating that, through temperature-dependent change in its crystal structures, adjusts automatically to changes in sunlight and heat absorption.