Materials Testing for PV Module Encapsulation

    Research output: Contribution to conferencePaper


    Important physical properties of materials used in PV module packaging are presented. High-moisture-barrier, high-resistivity, adhesion-promoting coatings on polyethyl-ene terephthalate (PET) films have been fabricated and characterized for use in PV module application and com-pared to standard polymer backsheet materials. Ethylene vinyl acetate (EVA) and an encapsulant replacement for EVA arestudied for their water vapor transmission rate (WVTR) and adhesion properties. WVTR, at test conditions up to 85?C/100% relative humidity (RH), and adhesion val-ues are measured before and after filtered xenon arc lamp ultraviolet (UV) exposure and damp heat exposure at 85?C/85% RH. Water ingress is quantified by weight gain and embedded humidity sensors.
    Original languageAmerican English
    Number of pages7
    StatePublished - 2003
    EventNational Center for Photovoltaics (NCPV) and Solar Program Review Meeting - Denver, Colorado
    Duration: 24 Mar 200326 Mar 2003


    ConferenceNational Center for Photovoltaics (NCPV) and Solar Program Review Meeting
    CityDenver, Colorado

    NREL Publication Number

    • NREL/CP-520-33578


    • adhesion
    • coatings
    • encapsulation
    • materials testing
    • moisture barrier backsheet
    • photovoltaic modules
    • water-vapor transmission rate


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