Abstract: The invention relates to a device for storing temperature-controlled fluids, comprising at least one container (20), a Peltier element (30), the hot side (301) of which is in contact with at least one wall (201) of the container (209), at least one device (40) for delivering ambient air to the cold side (302) of the Peltier element (30), and at least one electrical energy source (50, 501, 502) for supplying the Peltier element (30) and the device (40) for delivering the ambient air. For low-loss storage of the fluid in the container (20), the device (40) for delivering ambient air can be operated according to the temperature of the ambient air and the heating capacity of the Peltier element (30) can be controlled according to the currently produced electrical energy of a photovoltaic solar generator (501) forming an electrical energy source.