The first all-electric tugboat in the US is about to launch
With their roaring diesel engines, tugboats push, pull and guide much larger vessels into port and out to sea. They are small but mighty — and incredibly dirty, spewing huge amounts of toxic exhaust and planet-warming emissions every year. Now, however, the humble harbor craft is going electric. America’s first fully battery-powered tugboat recently docked at the Port of San Diego, where officials are working to decarbonize not just tugs but also diesel cranes and trucks. The electric tug was built over three years at an Alabama shipyard, then moved through the Panama Canal before arriving in Southern California earlier this spring. “We’re ecstatic,” Frank Urtasun, the port’s chairman, told Canary Media. “This electric tugboat is a real game-changer that I think will have ramifications across the country.” The 82-foot-long vessel is set to begin operating within the coming weeks, as soon as the shoreside charging infrastructure is completed, according to Crowley. The Florida-based company owns and operates the electric boat — named “eWolf” in honor of Crowley’s first tug, the 1965 Seawolf — and everything that’s needed to keep it running. The eWolf is launching as ports and cities around the world are pushing to decarbonize their industrial waterfronts. Globally, the cargo-shipping sector accounts for around 3 percent of total greenhouse gas emissions every year. While giant, oil-guzzling freighters tend to draw more public scrutiny for their large environmental impact, many thousands of smaller vessels and workboats are also major sources of both carbon emissions and local pollution. In the U.S., state and regional policies are increasingly requiring operators to slash emissions from vessels, cranes, forklifts and other diesel-burning equipment. About 39 million people live in close proximity to ports, many of whom are lower-income residents and people of color. An infusion of government funding has recently emerged to support those efforts. The 2022 Inflation Reduction Act includes $3 billion for zero-emission port equipment and infrastructure. The U.S. Environmental Protection Agency (EPA) is expected to announce the recipients of that funding later this year — along with the winners of a separate $115 million program under the 2022-2023 Diesel Emissions Reduction Act. “I’m excited about the electrification of ports,” EPA Administrator Michael Regan said last Friday, speaking to reporters at an environmental journalism conference in Philadelphia. He noted that programs to clean up ports complement federal efforts to slash emissions from heavy-duty trucks on land. The eWolf marks two important milestones for modern ports: It will curb emissions from an especially dirty vessel type, and it shows that electric tugs can work. A first-in-the-nation effort to clear the air Tugboats present a particularly tricky challenge for electrification: The vessels need lots of power to operate, but they have limited space on board for batteries. Crowley and its technical partners, including ABB, said they figured out how to make it all fit. The squat white tug uses a 6.2 megawatt-hour (MWh) battery system for its main propulsion and has two electric motors. When docked at the pier, eWolf will plug into the charging station, which is also a microgrid. The facility, which includes two 1.5 MWh batteries covered by solar panels, is also connected to San Diego Gas & Electric’s power grid. The eWolf also has two small diesel generators vessel for emergency use, and to enable the vessel to travel longer distances at reduced speeds. (Crowley) The idea is to allow the electric tug to recharge quickly during the day between operations, while also reducing bursts of high demand on the main electric grid, said Matt Jackson, vice president of Crowley’s advanced energy division. “A lot of ports are at the end of the grid, and they can sometimes be unreliable” when it comes to providing a steady supply of power, he said. “We’re putting in a resilient system so that you can leverage this technology, reduce your emissions, but also be able to operate no matter what state the grid is in.” The eWolf project, including the vessel and charging system, received nearly $14 million in local and federal grant funding, the bulk of which came from the San Diego County Air Pollution Control District. A Crowley representative didn’t disclose how much the electric tug cost to build overall. But the company said that the tug and microgrid together cost about twice as much as a diesel-powered tugboat of similar size.
With their roaring diesel engines, tugboats push, pull and guide much larger vessels into port and out to sea. They are small but mighty — and incredibly dirty , spewing huge amounts of toxic exhaust and planet-warming emissions every year. Now, however, the humble harbor craft is going electric. America’s first…
With their roaring diesel engines, tugboats push, pull and guide much larger vessels into port and out to sea. They are small but mighty — and incredibly dirty, spewing huge amounts of toxic exhaust and planet-warming emissions every year.
Now, however, the humble harbor craft is going electric.
America’s first fully battery-powered tugboat recently docked at the Port of San Diego, where officials are working to decarbonize not just tugs but also diesel cranes and trucks. The electric tug was built over three years at an Alabama shipyard, then moved through the Panama Canal before arriving in Southern California earlier this spring.
“We’re ecstatic,” Frank Urtasun, the port’s chairman, told Canary Media. “This electric tugboat is a real game-changer that I think will have ramifications across the country.”
The 82-foot-long vessel is set to begin operating within the coming weeks, as soon as the shoreside charging infrastructure is completed, according to Crowley. The Florida-based company owns and operates the electric boat — named “eWolf” in honor of Crowley’s first tug, the 1965 Seawolf — and everything that’s needed to keep it running.
The eWolf is launching as ports and cities around the world are pushing to decarbonize their industrial waterfronts.
Globally, the cargo-shipping sector accounts for around 3 percent of total greenhouse gas emissions every year. While giant, oil-guzzling freighters tend to draw more public scrutiny for their large environmental impact, many thousands of smaller vessels and workboats are also major sources of both carbon emissions and local pollution.
In the U.S., state and regional policies are increasingly requiring operators to slash emissions from vessels, cranes, forklifts and other diesel-burning equipment. About 39 million people live in close proximity to ports, many of whom are lower-income residents and people of color.
An infusion of government funding has recently emerged to support those efforts. The 2022 Inflation Reduction Act includes $3 billion for zero-emission port equipment and infrastructure. The U.S. Environmental Protection Agency (EPA) is expected to announce the recipients of that funding later this year — along with the winners of a separate $115 million program under the 2022-2023 Diesel Emissions Reduction Act.
“I’m excited about the electrification of ports,” EPA Administrator Michael Regan said last Friday, speaking to reporters at an environmental journalism conference in Philadelphia. He noted that programs to clean up ports complement federal efforts to slash emissions from heavy-duty trucks on land.
The eWolf marks two important milestones for modern ports: It will curb emissions from an especially dirty vessel type, and it shows that electric tugs can work.
A first-in-the-nation effort to clear the air
Tugboats present a particularly tricky challenge for electrification: The vessels need lots of power to operate, but they have limited space on board for batteries. Crowley and its technical partners, including ABB, said they figured out how to make it all fit.
The squat white tug uses a 6.2 megawatt-hour (MWh) battery system for its main propulsion and has two electric motors. When docked at the pier, eWolf will plug into the charging station, which is also a microgrid. The facility, which includes two 1.5 MWh batteries covered by solar panels, is also connected to San Diego Gas & Electric’s power grid.
The idea is to allow the electric tug to recharge quickly during the day between operations, while also reducing bursts of high demand on the main electric grid, said Matt Jackson, vice president of Crowley’s advanced energy division.
“A lot of ports are at the end of the grid, and they can sometimes be unreliable” when it comes to providing a steady supply of power, he said. “We’re putting in a resilient system so that you can leverage this technology, reduce your emissions, but also be able to operate no matter what state the grid is in.”
The eWolf project, including the vessel and charging system, received nearly $14 million in local and federal grant funding, the bulk of which came from the San Diego County Air Pollution Control District. A Crowley representative didn’t disclose how much the electric tug cost to build overall. But the company said that the tug and microgrid together cost about twice as much as a diesel-powered tugboat of similar size.