TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The solar cell is selected from multi-crystalline solar cell, thin film solar cell, compound semiconductor solar cell and/or amorphous silicon solar cell; an incident layer positioned next to the front encapsulant layer and a backing layer positioned to the back encapsulant layer.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Assembly: The assembly comprises a front encapsulant layer positioned next to the light-receiving side of the solar cell component and a back encapsulant layer positioned next to the back side of the solar cell component; a top side that faces the light source to a bottom side that is opposite from the light source, an incident layer that is positioned next to, a front encapsulant layer that is positioned next to, the solar cell component that is positioned next to, a back encapsulant layer that is positioned next to, a backing layer, where the front encapsulant layer and/or the back encapsulant layers is formed of the terionomer multilayer film or sheet.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: In the method (M1), the laminating step is conducted by subjecting the assembly to heat and further involves: subjecting the assembly to vacuum or pressure. In the prepared solar cell module, at least 75% of the 1800 peel strength between the terionomer multilayer film or sheet and its adjacent layer(s) is maintained after the module has been conditioned for 1000 hours at 85 degrees C and a relative humidity of 85%. Preferred Components: The second surface sub-layer of the terionomer multilayer film or sheet comprises the high melting point polymer. The terionomer multilayer film or sheet comprises at least one inner sub-layer and at least one of it comprises the high melting point polymer which is an ionomer. The first and second surface sub-layers of the terionomer multilayer film or sheet comprises the terionomer. The terionomer is derived from the acid terpolymer (preferably poly(ethylene-co-butyl acrylate-co-methacrylic acid), poly(ethylene-co-butyl acrylate-co-methacrylic acid)) which is 10-50 (preferably 20-40) % neutralized with a metal ion selected from sodium, lithium, magnesium and/or zinc, and comprises repeat units of the alpha , beta -ethylenically unsaturated carboxylic acid (7-11 wt.%) and repeat units of the alpha , beta -ethylenically unsaturated carboxylic acid ester (20-30 wt.%). The high melting point polymer is an ionomer having a melting point of at least 90 degrees C. The terionomer containing surface sub-layer(s) of the terionomer multilayer film or sheet has a thickness of 0.5 mils (0.013 mm) to 5 mils (0.13 mm). The high melting point polymer containing inner sub-layer(s) of the terionomer multilayer film or sheet has a thickness of 0.5 mils (0.013 mm) to 19 mils (0.48 mm); and the total thickness of the terionomer multilayer film or sheet is 2 mils (0.051 mm) to 20 mils (0.51 mm). The front encapsulant layer is formed of the terionomer multilayer film or sheet and the back encapsulant layer is formed of a polymeric material selected from acid copolymer, ionomer, ethylene vinyl acetate, poly(vinyl acetal) (including acoustic grade poly(vinyl acetal), polyurethane, polyvinylchloride, polyethylene, polyolefin block elastomer, poly( alpha -olefin-co- alpha , beta -ethylenically unsaturated carboxylic acid ester) copolymer, silicone elastomer, and/or epoxy resin. The front encapsulant layer and the back encapsulant layer comprises or is formed of the terionomer multilayer film or sheet. The incident layer is selected from glass sheets; polymeric sheets (s1) formed of polycarbonate, acrylic, polyacrylate, cyclic polyolefin, polystyrene, polyamide, polyester and/or fluoropolymer; and polymeric films (f1) formed of polyester, polycarbonate, polyolefin, norbornene polymer, polystyrene, styrene-acrylate copolymer, acrylonitrile-styrene copolymer, polysulfone, nylon, polyurethane, acrylic, cellulose acetate, cellophane, poly(vinyl chloride) and/or fluoropolymer. The backing layer is selected from glass sheet, the polymeric sheet (s1), polymeric film (f1), metal sheet, and ceramic plate. EXAMPLE - No suitable example given.