Ionomer-based backsheet materials that were launched by DuPont earlier this year for use as thin-film module encapsulants have now been recognized by Underwriters Laboratory. UL recognition assures that encapsulants have been manufactured using well-documented control practices resulting in predictable performance and consistency and eliminates the need for PV manufacturers to separately test the materials. DuPont’s ‘PV5200’ Series PVB-based sheets and ‘PV5300’ sheets are now UL recognized.
“Today’s module manufacturers are in a high-stakes race to create the ideal assembly of materials for economically installed and operated solar power systems,” noted Penny Perry, DuPont marketing manager for photovoltaic encapsulants. “Our goal is to remain the industry’s most relied-upon source of ready-to-use, UL-recognized raw materials that help get the most from new designs.”
DuPont claims that its ionomer-based sheet includes improved moisture resistance and extra stiffness for lower module deflections under windy conditions in the field.