In an outdoor exposure project for solar cover materials, anti-reflex and anti-soiling coated glass and polycarbonate with protective layers where analyzed. Therefore, degradation and soiling effects where quantified by measuring the change in transmittance. For 21 different types of AR coated glass, no relevant transmission losses were observed in a rural environment after seven years of exposure. On the other hand, the effect of soiling resulted in elevated transmission losses of 10-15% at the urban exposure site.

SPF Institute for Solar Technology