Outdoor energy-storage device

An outdoor energy-storage device (40) of a system (2) for the temperature conditioning of interior spaces (4) of a building (6), in particular for heating, cooling or air conditioning, wherein the outdoor energy-storage device (40) can be set up outside the building (6) and comprises, in a modular design, at least one energy storage unit (14), an air heat exchanger (22) and a device unit (50), wherein the energy storage unit (14) is designed with a liquid reservoir (16) with a water heat exchanger (18) for energy transmission and energy storage, the air heat exchanger (22) surrounds a radial fan (70) at least in sections around an outer circumference, so that an air flow through the air heat exchanger (22) is created radially from the outside to the inside, which air flow escapes axially upwards at the radial fan (70), wherein the device unit (50) is arranged between the energy storage unit (14) and the air heat exchanger (22) and has an exhaust air connection (56) for exhaust air of the building (6) such that inflowing exhaust air of the building (6) is distributed in the device unit (50), and wherein an insulation unit (66) shields the device unit (50) with respect to the environment, wherein the exhaust air of the building (6) is, after flowing through the device unit (50), guided by means of a fan (80) first to the energy storage unit (14) and then to the air heat exchanger (22) such that heat is recovered at least in the energy storage unit (14).