A solar power installation comprising: at least one bifacial PV module, each PV module having a panel including: bifacial PV cells, and panel sections free of said PV cells; a liquid cooling system of the bifacial PV module,; a flat mirror concentrator for concentrating light on both surfaces of the PV module; a heat exchanger with a fluid circulation system in fluid communication with the liquid cooling system; a solar tracking system; and a parabolic mirror concentrator located above the PV module; the liquid cooling system is a closed circulation circuit, having: a first circuit section being a volume located inside the PV module over surfaces of the panel with bifacial PV cells, bounded by transparent glass sheets, for cooling the surfaces of the panel with bifacial PV cells when a coolant passes along the PV module from bottom of the PV module to top PV module, and a second circuit section comprising a pipeline, part of which is in the focus of the parabolic mirror concentrator, communicating with the heat exchanger, the heated coolant coming out of the PV module entering the pipeline for being additionally heated by solar energy prior to entering the heat exchanger, in the pipeline, at the output of each PV module, non-return valves being installed to prevent the mutual influence of the fluid from different PV modules. at least one bifacial PV module, each PV module having a panel including: bifacial PV cells, and panel sections free of said PV cells; a liquid cooling system of the bifacial PV module,; a panel including: bifacial PV cells, and panel sections free of said PV cells; bifacial PV cells, and panel sections free of said PV cells; a liquid cooling system of the bifacial PV module,; a flat mirror concentrator for concentrating light on both surfaces of the PV module; a heat exchanger with a fluid circulation system in fluid communication with the liquid cooling system; a solar tracking system; and a parabolic mirror concentrator located above the PV module; the liquid cooling system is a closed circulation circuit, having: a first circuit section being a volume located inside the PV module over surfaces of the panel with bifacial PV cells, bounded by transparent glass sheets, for cooling the surfaces of the panel with bifacial PV cells when a coolant passes along the PV module from bottom of the PV module to top PV module, and a second circuit section comprising a pipeline, part of which is in the focus of the parabolic mirror concentrator, communicating with the heat exchanger, the heated coolant coming out of the PV module entering the pipeline for being additionally heated by solar energy prior to entering the heat exchanger, in the pipeline, at the output of each PV module, non-return valves being installed to prevent the mutual influence of the fluid from different PV modules. a first circuit section being a volume located inside the PV module over surfaces of the panel with bifacial PV cells, bounded by transparent glass sheets, for cooling the surfaces of the panel with bifacial PV cells when a coolant passes along the PV module from bottom of the PV module to top PV module, and a second circuit section comprising a pipeline, part of which is in the focus of the parabolic mirror concentrator, communicating with the heat exchanger, the heated coolant coming out of the PV module entering the pipeline for being additionally heated by solar energy prior to entering the heat exchanger, in the pipeline, at the output of each PV module, non-return valves being installed to prevent the mutual influence of the fluid from different PV modules.