An energy store includes a housing having a storage medium with latent heat during a phase transfer, which is provided during operation for solidifying into a solid phase and for melting into a liquid phase, including a first storage region which is provided at least periodically for the solid phase and in which an extractor heat exchanger is arranged for extracting heat, wherein the first storage region has a vertical axis, including a second storage region provided for the liquid phase, when the solid phase is present in the first storage region, wherein at least sections of the second storage region are provided as a casing around the first storage region, wherein at least one portion of a regeneration device is arranged in the second storage region for supplying heat. Same has a first and a second passage device for introducing and discharging for the liquid phase, wherein the first and/or the second passage device has a passage section with passage openings for the liquid phase, which is arranged with at least regions of the longitudinal extension thereof arranged about the vertical axis.