A system for transporting workpieces comprising a) a rail system comprising at least a carrier rail; b) at least one transport carriage for transporting workpieces movable in a transport direction on a carrier rail, comprising ba) a transport carriage chassis (30; 80; 94), which bears at least a drive roller (44.1, 44.2), which is rollable on a drive running surface of the carrier rail and is drivable by means of a drive motor (48.1, 48.2) which is carried along by the transport carriage chassis (30; 80; 94); bb) at least one fastening device for at least one workpiece, wherein bc) the transport carriage (14.1; 14,2; 14.3; 14.4) carries along an autonomous power supply device by means of which the drive motor (48.1, 48.2) can be supplied with energy and which comprises the at least one rechargeable energy storage; bd) the transport carriage chassis (30; 80; 94) comprises a leading unit, which runs ahead in the transport direction and a trailing unit which runs behind in the transport direction, which bear the fastening device and are coupled to the fastening device, wherein be) the leading unit bears a drive roller (44.1) and a drive motor (48.1); and/or bf) the trailing unit bears a drive roller (44.1) and a drive motor (48.2) and wherein bg) the leading unit and/or the trailing unit bears the at least one rechargeable energy storage, characterized in that c) an installation for energy supply of the transport carriage (14.1; 14,2; 14.3; 14.4) along the carrier rail is waived and d) the system comprises a charging station which are entered by the transport carriage chassis equipped with the rechargeable energy storages and where they can be recharged. a) a rail system comprising at least a carrier rail; b) at least one transport carriage for transporting workpieces movable in a transport direction on a carrier rail, comprising ba) a transport carriage chassis (30; 80; 94), which bears at least a drive roller (44.1, 44.2), which is rollable on a drive running surface of the carrier rail and is drivable by means of a drive motor (48.1, 48.2) which is carried along by the transport carriage chassis (30; 80; 94); bb) at least one fastening device for at least one workpiece, wherein bc) the transport carriage (14.1; 14,2; 14.3; 14.4) carries along an autonomous power supply device by means of which the drive motor (48.1, 48.2) can be supplied with energy and which comprises the at least one rechargeable energy storage; bd) the transport carriage chassis (30; 80; 94) comprises a leading unit, which runs ahead in the transport direction and a trailing unit which runs behind in the transport direction, which bear the fastening device and are coupled to the fastening device, wherein be) the leading unit bears a drive roller (44.1) and a drive motor (48.1); and/or bf) the trailing unit bears a drive roller (44.1) and a drive motor (48.2) and wherein bg) the leading unit and/or the trailing unit bears the at least one rechargeable energy storage, characterized in that ba) a transport carriage chassis (30; 80; 94), which bears at least a drive roller (44.1, 44.2), which is rollable on a drive running surface of the carrier rail and is drivable by means of a drive motor (48.1, 48.2) which is carried along by the transport carriage chassis (30; 80; 94); bb) at least one fastening device for at least one workpiece, wherein bc) the transport carriage (14.1; 14,2; 14.3; 14.4) carries along an autonomous power supply device by means of which the drive motor (48.1, 48.2) can be supplied with energy and which comprises the at least one rechargeable energy storage; bd) the transport carriage chassis (30; 80; 94) comprises a leading unit, which runs ahead in the transport direction and a trailing unit which runs behind in the transport direction, which bear the fastening device and are coupled to the fastening device, wherein be) the leading unit bears a drive roller (44.1) and a drive motor (48.1); and/or bf) the trailing unit bears a drive roller (44.1) and a drive motor (48.2) and wherein bg) the leading unit and/or the trailing unit bears the at least one rechargeable energy storage, characterized in that c) an installation for energy supply of the transport carriage (14.1; 14,2; 14.3; 14.4) along the carrier rail is waived and d) the system comprises a charging station which are entered by the transport carriage chassis equipped with the rechargeable energy storages and where they can be recharged.