NOVELTY - The back-contact back-sheet comprises a substrate (210) having an outer surface exposed towards an air-side of a photovoltaic module and an inner surface positioned opposite to the outer surface and exposed towards an inside of the photovoltaic module, and a layer (220) of an electrically conductive material adapted to be formed as a connecting circuit to the electrodes of solar cells and directly adherent to the inner surface of the substrate. The layer of conductive material is firmly fixed to the inner surface of substrate. The photovoltaic module comprises back-contact cells.    USE - The back-contact back-sheet is useful for a photovoltaic module (claimed).    ADVANTAGE - The back-contact back-sheet prevents moisture, oxygen and other factors depending on the atmospheric conditions from damaging the encapsulating material, the cells and the electrical connections, and high degree of opacity and reflectivity.    DETAILED DESCRIPTION - The back-contact back-sheet comprises a substrate (210) having an outer surface exposed towards an air-side of a photovoltaic module and an inner surface positioned opposite to the outer surface and exposed towards an inside of the photovoltaic module, and a layer (220) of an electrically conductive material adapted to be formed as a connecting circuit to the electrodes of solar cells and directly adherent to the inner surface of the substrate. The layer of conductive material is firmly fixed to the inner surface of substrate. The photovoltaic module comprises back-contact cells. The substrate comprises an insulating portion comprising a lower surface that faces the air-side of the photovoltaic module and is coincident with the outer surface of the substrate and an upper surface that is positioned opposite to the lower surface, and a primer layer firmly fixed to the upper surface of the insulating portion. The primer layer comprises a lower surface facing the upper surface of the insulating portion and an upper surface that is opposite to the lower surface of the primer layer and is coincident with the inner surface of the substrate. The insulating portion comprises a first insulating layer (212) of a first polymeric material having an outer surface facing the air-side of the photovoltaic module and an inner surface opposite to the outer surface, an intermediate layer (214) of a material impermeable to water vapor coupled to the inner surface of the first insulating layer, and a second insulating layer (216) of a second polymeric material coupled to the upper surface of the intermediate layer. The intermediate layer has a lower surface facing the first insulating layer and an upper surface opposite to the lower surface. The second insulating layer is applied onto the inner surface of the first insulating layer. An INDEPENDENT CLAIM is included for a method for producing a back-contact back-sheet for a photovoltaic module.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of a back-contact back-sheet.    Substrate (210)    First insulating layer (212)    Intermediate layer (214)    Second insulating layer (216)    Electrically conductive material layer. (220)