Charging station system for providing electrical energy for an electrically operated vehicle of a user in a smart grid, which has a plurality of energy connections (A, B, C), wherein each energy connection (A, B, C) is assigned to a different energy provider, wherein the user is identifiable by a subscriber identity in a mobile radio network, comprising: a server for the selection of an energy connection (A, B, C) for providing electrical energy, a charging station configured to provide electrical energy for the electrically operated vehicle, and wherein the charging station is able to be electrically linked to the plurality of energy connections (A, B, C), wherein the charging station has an electrical connection for providing the electrical energy for the electrically operated vehicle, and a communication interface configured to receive the user's subscriber identity and to transmit the received subscriber identity to the server via the mobile radio network, and wherein the server is configured, depending on the transmitted subscriber identity of the user, to select one of the energy connections (A, B, C) according to a selection of one of said energy connections (A, B, C), which selection is stored for this purpose by the user with respect to the latter's subscriber identity, and to enable a linking path between the charging station and the selected energy connection (A, B, C) in order to establish an electrical link via a physical line between the selected energy connection (A, B, C) and the charging station for providing the electrical energy, characterized in that the charging station comprises a subscriber identity module with a further subscriber identity for identifying the charging station in the mobile radio network; and wherein the subscriber identity module of the charging station comprises a SIM or an eSIM; and wherein the further subscriber identity of the charging station is a mobile radio subscriber identification and comprises an international mobile subscriber identity, IMSI for short, or an electronic identity, eID, wherein the further subscriber identity of the charging station is identifiable in the mobile radio network and can thereby be recognized and addressed by some other network identity; and wherein the communication interface of the charging station is configured to transmit the further subscriber identity of the charging station to the server in order to identify the charging station vis-à-vis the server; and wherein as a result of the transmission of the further subscriber identity of the charging station, the location of the charging station is known to the server. a server for the selection of an energy connection (A, B, C) for providing electrical energy, a charging station configured to provide electrical energy for the electrically operated vehicle, and wherein the charging station is able to be electrically linked to the plurality of energy connections (A, B, C), wherein the charging station has an electrical connection for providing the electrical energy for the electrically operated vehicle, and a communication interface configured to receive the user's subscriber identity and to transmit the received subscriber identity to the server via the mobile radio network, and wherein the server is configured, depending on the transmitted subscriber identity of the user, to select one of the energy connections (A, B, C) according to a selection of one of said energy connections (A, B, C), which selection is stored for this purpose by the user with respect to the latter's subscriber identity, and to enable a linking path between the charging station and the selected energy connection (A, B, C) in order to establish an electrical link via a physical line between the selected energy connection (A, B, C) and the charging station for providing the electrical energy, characterized in that the charging station comprises a subscriber identity module with a further subscriber identity for identifying the charging station in the mobile radio network; and wherein the subscriber identity module of the charging station comprises a SIM or an eSIM; and wherein the further subscriber identity of the charging station is a mobile radio subscriber identification and comprises an international mobile subscriber identity, IMSI for short, or an electronic identity, eID, wherein the further subscriber identity of the charging station is identifiable in the mobile radio network and can thereby be recognized and addressed by some other network identity; and wherein the communication interface of the charging station is configured to transmit the further subscriber identity of the charging station to the server in order to identify the charging station vis-à-vis the server; and wherein as a result of the transmission of the further subscriber identity of the charging station, the location of the charging station is known to the server.