Superior permeability

Superior permeability

The composition of the RENOLIT REFLEXOLAR 1500 PO back sheet is engineered to maximize acetic acid permeability (figure 1) and minimize Water Vapor Transmission Rate (figure 2). 

The activation Energy of permeability is such that drying of the inside of the PV modules is superior during sunshine and water vapor ingress is reduced under cold and humid conditions. These properties lead to reduced corrosion and extended electrical production.

Loss of weight of capsule covered by backsheet
Figure 1: The acetic acid permeability of RENOLIT REFLEXOLAR 1500 PO back sheets is much higher than the one of PET based back sheet (measurements by loss of weight of cups, sealed with the back sheet – 60°C).
Water Vapor Transmission Rate
Figure 2: The RENOLIT REFLEXOLAR 1500 PO back sheets achieve a better balance of Water Vapor Permeability, reducing water ingress in humid (cold) conditions and allowing better water egress in drying (hot) conditions.