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Tokyo Kisen Co., Ltd. and e5 Lab Inc. “e5 Tug” – electric tug powered by battery and hydrogen fuel cell

Tokyo Kisen Co., Ltd. and e5 Lab Inc. have jointly developed the new concept design of “e5 Tug,” electric propulsion harbor tugboat powered by large-capacity battery and a hydrogen fuel cell.
The e5 Tug is a harbor tug fully electrified and designed to minimize environmental footprint. 

The e5 Tug is equipped with a propulsion system running on “e5 powertrain platform”, devised and planned by e5 Lab, which utilizes a large-capacity battery system as a main power source and a hydrogen fuel cell and generator as the auxiliary power source. 
This electric propulsion system will ensure sufficient bollard pull and continuous cruising time necessary for harbor tugboat which requires a large-capacity power to function. Furthermore, CO2 emission is minimized by incorporating fuel cell.  
This joint project is drawing upon knowledge and experience of Tokyo Kisen as a tugboat operator and e5 Lab is undertaking concept planning / development, design, and project management.

We will proceed with the project by seeking advice from the Ministry of Land, Infrastructure, Transport and Tourism, ClassNK, and others for the regulatory compliance. After the final investment decision we aim to launch the tug for commercial operations at Yokohama Port and Kawasaki Port in 2022.

e5 tug outline
Type of vessel              Harbor tugboat 
Operating area             Yokohama Port / Kawasaki Port 
Propulsion                    2 x 1500kW azimuth thruster 
Towing power               50 tons 
Service speed              14 knots 

Main features of e5 Tug

It reduces CO2 emissions in all operational phases such as push / pull, transit and standby (it can also be reduced on the basis of Well-to-Propeller measure).
Contribution at the time of  disasters It has a function of power supply from ship to shore in the event of a disaster and can be used as an emergency power source.
Future scalability Fully electrified powertrains can adopt the most suitable energy sources (lithium-ion battery, hydrogen fuel cell, all-solid-state battery, LNG generators, etc.) in accordance with technological progress.
In the future, it will be possible to achieve zero emissions on Well-to-Propeller basis in combination with renewable energy.


About Tokyo Kisen Co. Ltd

Tokyo Kisen Co. Ltd. (Head office: Yokohama) is a major tugboat company in Japan with its mission of supporting maritime safety. Since the founding in 1947, the company has been consistently engaged in the operations of assisting navigational safety of ships throughout Tokyo Bay, the center of Japanese marine transportation, and one of the busiest sea traffic areas in the world.

Tokyo Kisen is operating harbor tugs, escort tugs, pilot boats and CTVs for offshore wind farms. In addition, its group companies operate transfer boats, water busses, harbor cruise ships and car ferries. In 2013, the company launched a (non-battery type) hybrid tug.

About e5 Lab Inc.

e5 Lab Inc. (Head office: Tokyo) is a shipping solution provider based on the electrification and digitization of ships. With the mission of “Sustainable domestic shipping, which is the lifeline of Japan”, we will create new added value by combining the latest technology and ideas, and solve the problems of domestic shipping, thereby ensuring safe navigation of ships. We aim to contribute to society by protecting the global environment. Currently, we are proceeding with a project aimed at completing an electric propulsion Tanker “EV Tanker” of Asahi Tanker Co., Ltd. in 2021.
Five values provided by e5 Lab: electrification, environment, efficiency, economics, evolution

e5 project promotion video: https://youtu.be/6sJjzCbRFWw

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