Power supply system for an electrical drive of a marine vessel

A power supply system for an electrical drive of a marine vessel is provided. The electrical drive comprises an electric motor that is adapted to receive electric energy from a power source. The electrical drive has a first operating state in which electric energy is supplied by the power source to the electrical drive to operate the electrical drive and a second operating state in which the electric motor of the electrical drive is decelerated or braked, wherein the electrical drive generates electric energy in the second operating state. The power supply system comprises an electric energy storage device for storing generated electric energy.