TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The back-side film comprises (a) the weather-stable protective layer, (b) an optional adhesive layer, (c) an optional barrier layer, (d) a carrier film and (e) the filler present in at least one of the layers of the protective layer, at least one layer of a two-layer protective layer, adhesive layer and/or the carrier film. The backside film comprises at least the protective layer, the adhesive layer, the barrier layer and the carrier film from the outside to inside. The protective layer is: a poly(methyl methacrylate) (PMMA)-film, a PMMA- polyvinylidene fluoride (PVDF)-blend film, a film consisting of a coextrudate of PMMA and a polyolefin or a polyester; or a PMMA-polyolefin-, a PMMA-polyethylene terephthalate (PET)- and/or a PMMA-PVDF-two-layer film, in which the PMMA-layer is a blend of PMMA with PVDF, polypropylene or PET. The barrier layer comprises an inorganic oxide, and the carrier film comprises a polyester- or a polyolefin film. The barrier layer is a metal layer, preferably aluminum layer, and the filler is present in the carrier film. The filler is inorganic particles. The filler in the carrier film is present in a concentration of 1-30 wt.%. The adhesive layer is made from a hot-melt adhesive, which is an ethylene-vinyl acetate copolymer, an ethylene-acrylate copolymer or an ethylene-methacrylate copolymer. The carrier film exhibits a thickness of 100-400 mu m, the adhesive layer exhibits a thickness of 5-50 mu m, and the protective layer exhibits a thickness of 50-1000 mu m. The barrier layer is a silicon oxide (SiOx) layer, where x is 1.3-1.7, or an aluminum oxide (AlOx) layer, where x is 1.2-1.5, and that the oxide layers respectively exhibit a thickness of 10-100 nm. The barrier layer comprises the metal layer, which exhibits a thickness of 10-100 nm. The back-side film exhibits a partial discharge voltage of at least 1000 V, and a transparency of less than 10% in a wavelength range of 300-1200 nm. EXAMPLE - Barrier layer of aluminum oxide was deposited on the carrier film of a biaxially oriented PET via vacuum evaporation. The carrier film was laminated on the PMMA-protective layer using a layer of a two-component adhesive system to obtain the film as a laminate.