An installation comprising: a power module supplying electricity and giving off heat, the power module comprising at least one fuel cell provided with an anode and a cathode, and at least one reformer, the anode being fed with hydrogen by the reformer and the cathode being fed with oxygen, the fuel cell including a heat removal loop; a n absorption heat engine having a first boiler, a condenser, an evaporator, and an absorber, a heat exchange circuit of the first boiler being inserted in the heat removal loop of the fuel cell in order to cool it; and a closed liquid circulation circuit, said closed circulation circuit comprising at least one heat exchanger (26, 28, 30, 32) having a heating circuit (26a, 28a, 30a, 32a) thermally coupled to the power module and a heated circuit (26b, 28b, 30b, 32b) inserted in said circulation circuit, said closed circulation circuit exchanging heat with said heating circuit (26a, 28a, 30a, 32a), thereby heating the liquid of the closed circulation circuit, and wherein: a heat exchange circuit of the evaporator is inserted in said closed liquid circulation circuit, said heat exchange circuit of the evaporator having said heated liquid of the circulation circuit passing therethrough after passing through the heated circuit (26b, 28b, 30b, 32b) of said heat exchanger (26, 28, 30, 32) in order to cool the heated liquid of said closed circulation circuit; the installation being characterized in that the condenser of the absorption heat engine has a heat exchange circuit that is inserted in a circuit for feeding air to the cathode and/or to the reformer, in order to heat that air. a power module supplying electricity and giving off heat, the power module comprising at least one fuel cell provided with an anode and a cathode, and at least one reformer, the anode being fed with hydrogen by the reformer and the cathode being fed with oxygen, the fuel cell including a heat removal loop; a n absorption heat engine having a first boiler, a condenser, an evaporator, and an absorber, a heat exchange circuit of the first boiler being inserted in the heat removal loop of the fuel cell in order to cool it; and a closed liquid circulation circuit, said closed circulation circuit comprising at least one heat exchanger (26, 28, 30, 32) having a heating circuit (26a, 28a, 30a, 32a) thermally coupled to the power module and a heated circuit (26b, 28b, 30b, 32b) inserted in said circulation circuit, said closed circulation circuit exchanging heat with said heating circuit (26a, 28a, 30a, 32a), thereby heating the liquid of the closed circulation circuit, and wherein: a heat exchange circuit of the evaporator is inserted in said closed liquid circulation circuit, said heat exchange circuit of the evaporator having said heated liquid of the circulation circuit passing therethrough after passing through the heated circuit (26b, 28b, 30b, 32b) of said heat exchanger (26, 28, 30, 32) in order to cool the heated liquid of said closed circulation circuit; the installation being characterized in that the condenser of the absorption heat engine has a heat exchange circuit that is inserted in a circuit for feeding air to the cathode and/or to the reformer, in order to heat that air. a heat exchange circuit of the evaporator is inserted in said closed liquid circulation circuit, said heat exchange circuit of the evaporator having said heated liquid of the circulation circuit passing therethrough after passing through the heated circuit (26b, 28b, 30b, 32b) of said heat exchanger (26, 28, 30, 32) in order to cool the heated liquid of said closed circulation circuit; the installation being characterized in that the condenser of the absorption heat engine has a heat exchange circuit that is inserted in a circuit for feeding air to the cathode and/or to the reformer, in order to heat that air.