Ingress

Water ingress into photovoltaic panel packaging

Many thin film PV technologies are sensitive to moisture requiring the use of packaging schemes that prevent or reduce moisture over a 25 y expected product lifetime. This is easily accomplished using a glass frontsheet, with an impermeable backsheet and polyisobutylene based. . versary to hermetic packaging. However, at present, there exist no solutions for extremely water-sensitive mater als for flexible applications. By using diffu-sivity measurements for water through encapsulants such as ethylene vinyl acetate (EVA), we have modeled mois-ture ingress using a. . This document was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor Lawrence Livermore National Security, LLC, nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or. . NRELisanationallaboratoryoftheU. DepartmentofEnergy, OfficeofEnergyEfficiencyand RenewableEnergy, operated bytheAllianceforSustainableEnergy, LLC. How do PV panels. . By Arrelaine A. Dameron, Postdoctoral Researcher, National Center for Photovoltaics, NREL; Matthew O. Moricone, Research Technician, PV Module Reliability Group, NREL; Michael Kempe, Scientist, PV Module Reliability. .