Stena Line Takes Up Battery Technology


For Ro-Pax vessels particularly, it is crucial to always have sufficient power to run the bow thrusters. A power black-out along a coastal route or narrow waterway could be devastating. This means that often most of the engines are running idle, resulting in low efficiency, low fuel economy and unnecessarily high emissions.

However, with a large energy storage system capable of supplying power instantaneously, some of the engines can be switched off, and this is a solution that Stena Line is embarking on for its Stena Jutlandica which operates between Gothenburg, Sweden, and Frederikshavn, Denmark. The company recently signed a contract for the system with Callenberg Technology Group, part of Trident Maritime Systems.

The energy storage project is an important part of Stena Line’s sustainability strategy, says Stena Line’s CEO Niclas Mårtensson. “As both the size and cost of batteries decrease, battery operation becomes a very exciting alternative to traditional fuels for shipping, as emissions to air can be completely eliminated.”

The project will be implemented in three steps. In the first, the system is designed to enable switching on battery power for bow thrusters and maneuvering when berthing in port. In step two, battery power will be able to be used on the main propulsion system, so that Stena Jutlandica can be operated on electricity for around 10 nautical miles. Step three aims at achieving operating distances of about 50 nautical miles, the distance between Gothenburg and Frederikshavn.

The system will be housed modified container that will be placed on the vessel’s weather deck. This gives the flexibility to transfer the system to another vessel if desired. Corvus Energy will supply its lithium ion Orca Energy Storage System which will have the capacity to supply up to 3,000 kW instantaneously and has an energy content of approximately 1,000 kWh. A modular design enables components to be replaced when new technology becomes available.

“One consideration when installing an energy storage system on board an existing ship is the integration work needed to fit the new unit to the ships main electric switchboard,” says Per-Erik Larsson, Director Sales at Callenberg. “Redesigning, rewiring, software changes and new electric

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