Significantly more battery capacity for hybrid ferry

Aurora Botnia Significantly More Battery Capacity for Hybrid Ferry

2026-02-24 From Thomas Günnel | Translated by AI 1 min Reading Time

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The shipping company Wasaline has equipped the Aurora Botnia with the highest battery capacity currently available for a freight and passenger ferry. The hybrid ferry connects Finland with Sweden.

The Aurora Botnia ferry currently has the largest battery capacity of any RoPax ship in the world.(Image: Wasaline) — The Aurora Botnia ferry currently has the largest battery capacity of any RoPax ship in the world.
(Image: Wasaline)

The Finnish shipping company Wasaline has equipped the hybrid-powered ship "Aurora Botnia" with the largest battery capacity of a RoPax ship in the world, according to the company. "Ro" stands for Roll On/Roll Off of the cargo, "Pax" is short for passengers.

The sea trials have been completed and the modernized battery system has been approved for shipping. The ship's battery capacity is now 12.6 megawatt hours. Previously it was 2.2 MWh. The shipping company uses the larger capacity to power the ferry during maneuvers in port. It is also used for the power supply on board. When docked in port, the ferry uses shore power, also to charge the batteries.

Hybrid Ferry Two Electric Motors

Wasaline sails the route between Vaasa in Finland and Umea in Sweden. A crossing takes between 3.5 and four hours. The Aurora Botnia is equipped with two electric motors and four combustion engines from Wartsilä. The company uses one combustion engine as a laboratory and test machine.

The new batteries come from marine battery manufacturer AYK Energy. They store almost five times more energy than the previous battery packs. The modernization of the ferry began during operation. The work was completed in the repair yard of the Finnish shipbuilding company BLRT.

Data on the Aurora Botnia

The Aurora Botnia was completed in 2021. The ship has space for 935 passengers. The loading capacity comprises 1,500 loading meters for trucks and cars. The combustion engines are dual-fuel capable - they can run on biogas, biodiesel and liquefied natural gas in addition to marine diesel.

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