NOVELTY - The system for mounting a photovoltaic module (210) on a metal structure (230), comprises a photovoltaic cell (213) comprising electrically conductive elements (214, 216), a metal part at a level of region where the photovoltaic cell is placed and close to a metal ground of the structure, and an electrically insulating member positioned between the metal part and the part closest to the electrically conductive elements of the photovoltaic cell. The total thickness of electrically insulating material between the metal part and the part closest to the electrically conductive elements is 12 mm.    USE - The system is useful for mounting a photovoltaic module on a metal structure to form an assembly for the production of high voltage electricity (all claimed).    ADVANTAGE - The system ensures easy mounting of a photovoltaic module on a metal structure in a uniform manner thus forming a photovoltaic assembly with high compactness and mechanical resistance, and avoids the risk of deterioration of photovoltaic modules while improving the intensity of the electric field at which the modules are exposed.    DETAILED DESCRIPTION - The system for mounting a photovoltaic module (210) on a metal structure (230), comprises a photovoltaic cell (213) comprising electrically conductive elements (214, 216), a metal part at a level of region where the photovoltaic cell is placed and close to a metal ground of the structure, and an electrically insulating member positioned between the metal part and the part closest to the electrically conductive elements of the photovoltaic cell. The total thickness of electrically insulating material between the metal part and the part closest to the electrically conductive elements is 12 mm. The electrically insulating member comprises a rear substrate constituted of an insulating material. The region in which the photovoltaic cell close to the metal part is a module region fixed on the structure. The electrically insulating element (212) comprises two fasteners connected to back side of the rear substrate and regularly distributed over a face and offset inwardly from the peripheral edges of the module. The fasteners comprise a polymer material and a composite material comprising a polymer matrix and electrically insulating fibers, and are directly coupled with a metal part of the structure for fixing the module on the structure. The electrically insulating element comprises a support connected to the metal part of the structure. The fasteners are coupled with the support for fixing the module on the structure, and further comprise a pattern, a projection or a hollow part in contact with an additional pattern, a projection or a hollow part of the support. The support comprises a polymer material and a composite material comprising a polymer matrix and electrically insulating fibers, and is connected to the metal part of the structure by lock mechanism.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a photovoltaic module mounted on a metal structure.    Photovoltaic module (210)    Electrically insulating element (212)    Photovoltaic cell (213)    Electrically conductive elements (214, 216)    Metal structure. (230)