A method for alternate storage and outputting of the thermal energy which is obtained in the primary circuit of a solar-thermal power station, using a heat carrier medium, which can be partially fed between a plurality of storage tanks, in each case flowing through a heat transmission apparatus which is operatively connected to the primary circuit and/or to the steam/water circuit, which heat carrier medium can be heated to a higher temperature or can be cooled to a lower temperature, the aim is to provide a solution which makes it possible, with a storage capacity which is the same as that of installations known from the prior art, to avoid the disadvantages of the prior art, in particular with a smaller space requirement and occupying a smaller installation area. This is achieved in that at least one of the plurality of storage tanks is alternately used for storage of a respectively partially fed volume of the heat carrier medium in the state of its higher temperature and for storage of a respectively partially fed volume of the heat carrier medium in the state of its lower temperature.