The invention relates to an
electrolysis system (100) comprising at least two
electrolysis devices (1A, 1B), a current supply source (3) having a
DC voltage output (7), and a central supply line (5), the central supply line (5) being connected to the
DC voltage output (7) of the current supply source (3) such that a
DC current can be fed to the central supply line (5) at a first
DC voltage (31). The
electrolysis devices (1A, 1B) are electrically connected in parallel to the central supply line (5), and wherein a central
voltage source converter (13), in particular a modular multilevel converter (13), is connected at a
network connection point (35) for supplying a
direct current from the
utility network (25), which converts an
alternating current at the input into a first direct
voltage (31) at the output at the direct
voltage output (7). In this case, each electrolysis device (1A, 1B) is connected in parallel to the DC voltage output (7) of the
voltage source converter (13) via a DC /
DC converter (11A, 11B) which converts the first DC voltage (31) into a second DC voltage (33, 33A, 33B), such that the second DC voltage (33A, 33B) drops across the electrolysis device (1A, 1B), each DC /
DC converter (11A, 11B) can be controlled and / or adjusted to adaptively adjust the magnitude of the second DC voltage (101, 102) thereof.