Marine or power plant power supply system

Ship power supply system (10) for supplying an electrical load of a ship with a target electric voltage and a target electric power, with a plurality of automotive traction battery modules (11), each automotive traction battery module (11) an electrical actual voltage and an electric having -Energy; wherein the automotive traction battery modules (11) pending from the target electric voltage of the electric actual voltage, the target electric power and the electric actual power in series connections to a plurality of traction battery module subsets (17a, 17b, 17c) and / or in a parallel circuit to at least one traction battery module group (12a, 12b, 12c) are connected.