The Port of San Diego has introduced the nation’s first all-electric tugboat, the eWolf, operated by Crowley Maritime Corp. This 82-foot vessel is expected to start emissions-free operations soon, marking a significant advancement in green maritime technology. The eWolf, powered by a 6.2 megawatt-hour main propulsion battery and two electric drives, will escort ships in and out of the Tenth Avenue Marine Terminal using electric power instead of diesel fuel, contributing to the reduction of greenhouse gas emissions in the surrounding areas.
The eWolf boasts an impressive bollard pull of 76.8 short tons, outperforming its diesel counterparts in power and efficiency. Constructed in Alabama, it also includes two small generators for emergency use, ensuring its capability to cover longer distances if necessary. The tugboat will be recharged at a specially designed charging station linked to a microgrid facility, ensuring a quick recharge and reduced peak loads on the electric grid.
Officials at Crowley have highlighted the eWolf’s operational cost advantages due to its electric nature, which requires fewer moving parts compared to traditional diesel-powered tugboats. Despite its initial cost being about twice as much as a conventional tugboat, the eWolf is anticipated to bring about dramatic reductions in maintenance and operating expenses. Funded partly by a $17.8 million federal grant, the eWolf aligns with California’s environmental goals and is expected to eliminate about 35,000 gallons of diesel fuel consumption yearly, significantly reducing carbon emissions in the area.
This initiative showcases the Port of San Diego’s commitment to electrification and environmental sustainability, following its installation of all-electric cranes last year. The eWolf is set to begin commercial operations soon, contributing to the port’s efforts to reduce greenhouse gas emissions and setting a precedent for zero-emission maritime operations.
Credits:
- Transport Topics, “San Diego Port Unveils Nation’s First All-Electric Tugboat”.
