Solar mat for installation on a mountain lake, comprising a plurality of floating elements, each of the floating elements being configured to support loads while floating on the surface of the lake and to withstand forces originating at least from another of the floating elements or from an environmental influence; one or more photovoltaic panels mounted on each of the elements of the plurality of floating elements, by means respectively of a support structure configured to separate the photovoltaic panels from the surface of the water by a predetermined height, selected to avoid contact with the water and so that any snow that might come into contact with a photovoltaic panel can easily fall off the panel for removal without accumulating in front of the panels; an inverter and a transformer; a defined floating structure defined to support the inverter and the transformer; articulated connection means connecting the elements of the plurality of floating elements and the defined floating structure together in a matrix in order to form the solar mat; and anchoring means; the articulated connection means comprising main cables, secondary cables and intermediate buoys; the secondary cables being configured to hold the floating elements and the defined floating structure in their mutually-relative positions; the main cables being configured to support the secondary cables and to fix the solar mat to anchoring means situated substantially on the edge of the lake; the intermediate buoys being configured to support the main cables and to hold them above the surface of the water; the articulated connection means also being configured so that the floating elements are placed on the ground at the bottom of the lake following the topography thereof when the lake is substantially empty of water; the solar mat also being connected to the intermediate buoys by the secondary cables, the intermediate buoys being connected to the anchoring means by the main cables. a plurality of floating elements, each of the floating elements being configured to support loads while floating on the surface of the lake and to withstand forces originating at least from another of the floating elements or from an environmental influence; one or more photovoltaic panels mounted on each of the elements of the plurality of floating elements, by means respectively of a support structure configured to separate the photovoltaic panels from the surface of the water by a predetermined height, selected to avoid contact with the water and so that any snow that might come into contact with a photovoltaic panel can easily fall off the panel for removal without accumulating in front of the panels; an inverter and a transformer; a defined floating structure defined to support the inverter and the transformer; articulated connection means connecting the elements of the plurality of floating elements and the defined floating structure together in a matrix in order to form the solar mat; and anchoring means; the articulated connection means comprising main cables, secondary cables and intermediate buoys; the secondary cables being configured to hold the floating elements and the defined floating structure in their mutually-relative positions; the main cables being configured to support the secondary cables and to fix the solar mat to anchoring means situated substantially on the edge of the lake; the intermediate buoys being configured to support the main cables and to hold them above the surface of the water; the articulated connection means also being configured so that the floating elements are placed on the ground at the bottom of the lake following the topography thereof when the lake is substantially empty of water; the solar mat also being connected to the intermediate buoys by the secondary cables, the intermediate buoys being connected to the anchoring means by the main cables.