NOVELTY - Method (I) for preparing transparent multilayer film laminate, comprises: (a) providing first film layer comprising perfluorinated copolymer resin composition, where a surface of the first film layer has been modified by surface treatment; (b) providing second film layer comprising polymeric material; (c) treating a surface of the second film layer with aminosilane coupling agent; (d) contacting surface-treated second film layer with the modified surface of first film layer; and (e) adhering first film layer to second surface-treated film layer by applying heat and optionally pressure/vacuum.    USE - The method is useful for preparing transparent multilayer film laminate, which is useful for preparing photovoltaic module (claimed) including wafer-based solar module and thin film solar module.    ADVANTAGE - The method provides the transparent multilayer laminate, which: has an average peel strength of greater than 2 lbf/inch between the first film layer and the second surface-treated film layer, as measured after exposing the multilayer film laminate to conditions of 85 degrees C and 85% relative humidity for 1000 hours, and a light transmission level, as a percentage of the light transmitted through air at wavelengths of 400-800 nm, of greater than that of a comparison standard laminate, as determined according ASTM E424, thus exhibiting excellent transparency (i.e. light transmission) and adhesion; and provides the photovoltaic module having improved energy conversion efficiency.    DETAILED DESCRIPTION - Method (I) for preparing a transparent multilayer film laminate comprising at least a first film layer and a second film layer, comprises: (a) providing a first film layer comprising a perfluorinated copolymer resin composition, where the perfluorinated copolymer resin comprises copolymerized units of tetrafluoroethylene and at least one perfluorinated comonomer, and at least one surface of the first film layer has been modified by a surface treatment; (b) providing a second film layer comprising a polymeric material including alpha -olefin ethylenically unsaturated carboxylic acid copolymers or its ionomers, ethylene vinyl acetate copolymers, poly(vinyl acetals), polyurethanes, polyvinylchlorides, polyethylenes, polyolefin block copolymer elastomers, copolymers of alpha -olefins and ethylenically unsaturated carboxylic acid esters, silicone elastomers and/or epoxy resins; (c) treating a surface of the second film layer with an aminosilane coupling agent to provide a surface-treated second film layer; (d) contacting a treated surface of the surface-treated second film layer with the modified surface of the first film layer; and (e) adhering the first film layer to the second surface-treated film layer by applying heat and optionally pressure or vacuum to form the multilayer film laminate. The multilayer film laminate has: an average peel strength between the first film layer and the second surface-treated film layer of greater than 2 lbf/inch, measured after exposing the multilayer film laminate to conditions of 85 degrees C and 85% relative humidity for 1000 hours, provided that when the second film layer comprises an ethylene vinyl acetate copolymer, the multilayer film laminate is maintained at sufficient temperature for time sufficient to crosslink the ethylene vinyl acetate copolymer prior to exposing the multilayer film laminate to the above conditions; and a light transmission level, as a percentage of the light transmitted through air at wavelengths of 400-800 nm, as determined according ASTM E424, that exceeds that of a comparison standard laminate, where the multilayer film laminate and the comparison standard laminate have the same structure and composition with the exception that the first film layer of the comparison standard laminate comprises an ethylene tetrafluoroethylene copolymer resin. INDEPENDENT CLAIMS are also included for:    (1) a method (II) for preparing a photovoltaic module, comprising: (a1) providing a solar cell layer; (b1) providing the transparent multilayer film laminate that is larger in area than the solar cell layer; (c1) overlaying the solar cell layer with the multilayer film laminate so that a surface of the second film layer of the multilayer film laminate contacts the solar cell layer, a portion of the second film layer of the multilayer film laminate extends beyond the perimeter of the solar cell layer, and the portion of the second film layer of the multilayer film laminate that extends beyond the perimeter of the solar cell layer contacts an additional layer that is an encapsulant layer; and (d1) adhering the second film layer of the multilayer film laminate to the solar cell layer and the encapsulant layer by applying heat and optionally pressure or vacuum; and    (2) a method (III) for preparing the photovoltaic module comprising the multilayer laminate, comprising: the step (a1) as above per se; the step (a) as above per se; (b2) providing a second film layer having an upper and a lower surface, where the second film layer is larger in area than the solar cell layer, and comprises the polymeric material; (c2) treating the upper surface of the second film layer with the aminosilane coupling agent to provide the surface-treated second film layer; (d2) contacting the modified surface of the first film layer with the treated upper surface of the surface-treated second film layer; (e2) contacting the solar cell layer with the second film layer so that the lower surface of the second film layer contacts the solar cell layer, a portion of the second film layer extends beyond the perimeter of the solar cell layer, and the portion of the second film layer that extends beyond the perimeter of the solar cell layer contacts another layer that is the encapsulant layer; and (f2) adhering the second film layer to the first film layer, the solar cell layer and the encapsulant layer by applying heat and optionally pressure or vacuum to provide the photovoltaic module.