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Japan’s Tokyo Kisen and e5 Lab to develop fully electrified tug

Japan’s Tokyo Kisen Co and e5 Lab Inc. have jointly developed a new concept design of an electric propulsion harbour tugboat powered by large-capacity battery and hydrogen fuel cell.

The electric tug, name e5 Tug, will be equipped with a propulsion system running on ‘e5 powertrain platform’, devised and planned by e5 Lab, which utilises a large-capacity battery system as a main power source and a hydrogen fuel cell and generator as the auxiliary power source.

The electric propulsion system will ensure sufficient bollard pull and continuous cruising time necessary for harbour tugboat which requires large-capacity power to function. In addition, carbon dioxide emission will be minimised by incorporating fuel cell.

The e5 Tug will have two 1,500 kW azimuth thruster and will operate in the Yokohama and Kawasaki port areas.

The aim is to launch the tug for commercial operations in 2022.

The joint project draws on the knowledge and experience of Tokyo Kisen as a tugboat operator and e5 Lab is undertaking concept planning, development design and project management.