Crowley christens its fully electric tugboat eWolf


Crowley christened its fully electric tugboat, named eWolf, at the Port of San Diego.

Florida-based marine company Crowley has christened the eWolf, what has been described as ‘America’s first all-electric ship assist harbour tugboat’.

The battery-powered, 82-foot (25-meter) eWolf was christened at the Port of San Diego on June 25, six months after its delivery in January this year.

“The all-electric tugboat is the most technologically advanced vessel of its kind, and eWolf will help our customers and communities reach their decarbonization goals while delivering capabilities that strengthen our vital supply chain,” said Tom Crowley, Chairman and CEO.

“We congratulate the people whose tireless dedication brought the eWolf to fruition with our partners at the federal, state and local government, setting a new standard not just in America, but globally.”

The tug was designed by Crowley’s engineering services group in collaboration with ABB and was constructed by Master Boat Builders at its shipyard in Coden, Alabama. It is fitted with ABB’s integrated end-to-end electrical propulsion system including a 6.2-megawatt-hour energy storage system (ESS), and Schottel’s RudderPropellers type SRP 430 with the LE-Drive.

According to ABB, the system allows the vessel to achieve 70 short tons of bollard pull with zero emissions and complete a full day of work on a single charge.

The eWolf was developed through a partnership among the Port of San Diego, San Diego County Air Pollution Control District, the California Air Resources Board (CARB), the U.S. EPA and the U.S. Maritime Administration.

The eWolf will replace a tug that consumed over 30,000 gallons of diesel per year.

The tug will operate at the Port of San Diego upon completion of Crowley’s microgrid shoreside charging station.

The charging station is a microgrid charging facility that will allow vessels to recharge quickly while reducing peak loads on the community energy grid. It is equipped with two containerized energy storage systems provided by Norway-based energy storage company Corvus Energy.

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