A rail vehicle (100, 200), having: a grid converter (110, 210); a traction converter (140, 240) connected to the grid converter (110, 210) via a DC voltage intermediate circuit (114, 214) for supplying a traction motor (150, 250) of the rail vehicle (100, 200); an auxiliary converter (130, 230) connected to the DC intermediate circuit (114, 214) for supplying auxiliary systems; and a traction battery (120, 220) connected to the DC intermediate circuit (114, 214), wherein the traction battery (120, 220) is configured to supply the DC intermediate circuit (114, 214) with current when passing through a separation point; wherein, during normal operation, the rail vehicle is supplied with electrical energy via an electrical grid; and the traction battery (120, 220) is charged with electrical energy from the DC intermediate circuit (114, 214); wherein the rail vehicle is configured to be operated in a hybrid operating mode, wherein, outside of the separation point, the grid converter is supplied with external electrical energy, and the DC intermediate circuit is only supplied with electrical energy from the traction battery, or the DC intermediate circuit is supplied both with external electrical energy and also with electrical energy from the traction battery; wherein the rail vehicle is configured to generate an operating point analysis of the rail vehicle to determine whether the normal operation or the hybrid operating mode is carried out; wherein the operating point analysis includes the determination of an efficiency in an operating point for energy supply only by external electrical energy, for energy supply only by the traction battery, and also for energy supply by both external energy and also by the traction battery. a grid converter (110, 210); a traction converter (140, 240) connected to the grid converter (110, 210) via a DC voltage intermediate circuit (114, 214) for supplying a traction motor (150, 250) of the rail vehicle (100, 200); an auxiliary converter (130, 230) connected to the DC intermediate circuit (114, 214) for supplying auxiliary systems; and a traction battery (120, 220) connected to the DC intermediate circuit (114, 214), wherein the traction battery (120, 220) is configured to supply the DC intermediate circuit (114, 214) with current when passing through a separation point; wherein, during normal operation, the rail vehicle is supplied with electrical energy via an electrical grid; and the traction battery (120, 220) is charged with electrical energy from the DC intermediate circuit (114, 214); wherein the rail vehicle is configured to be operated in a hybrid operating mode, wherein, outside of the separation point, the grid converter is supplied with external electrical energy, and the DC intermediate circuit is only supplied with electrical energy from the traction battery, or the DC intermediate circuit is supplied both with external electrical energy and also with electrical energy from the traction battery; wherein the rail vehicle is configured to generate an operating point analysis of the rail vehicle to determine whether the normal operation or the hybrid operating mode is carried out; wherein the operating point analysis includes the determination of an efficiency in an operating point for energy supply only by external electrical energy, for energy supply only by the traction battery, and also for energy supply by both external energy and also by the traction battery.