Posted on November 24, 2025
Technology group Wärtsilä will supply an integrated hybrid propulsion system for a bulk carrier vessel being built at the Royal Bodewes shipyard in the Netherlands for Norwegian shipowner Aasen Shipping. This will be the latest in a series of six such vessels to operate with a similar Wärtsilä scope of supply. This order was booked by Wärtsilä in Q3 2025.
To address the industry’s increasingly stringent decarbonisation targets, Aasen Shipping is focused on utilising the latest technologies to cut emissions, reduce fuel costs and keep carbon-costs to a minimum. In combination with the highly efficient and flexible Wärtsilä 25 engine, Wärtsilä’s hybrid propulsion system will enable Aasen Shipping to optimise operations, save fuel and enhance environmental sustainability for its six new bulk carriers.
“The support from Wärtsilä and the performance efficiency of their equipment with the earlier ships in this series have strongly contributed to our dedication to operating efficient and cleaner cargo transport. In addition, Wärtsilä’s 25 main engine is designed to be future-proof, meaning we can switch to sustainable fuels as they become available, further supporting our ambitions for long-term environmental sustainability,” says Torbjørn Torkelsen, CEO, Aasen Shipping.
The 9500 DWT bulk carrier vessel will operate with one six-cylinder Wärtsilä 25 main engine fitted with a Wärtsilä NOx Reducer, a Wärtsilä gearbox and controllable pitch propeller with shaft line, and a Wärtsilä ProTouch remote propulsion control system. The Hybrid system includes a DC hub and 620kWh battery capacity, as well as the control system, battery, power, and energy management systems.
The Wärtsilä 25 engine is a medium-speed 4-stroke marine engine designed for easy upgrades to operate on future low or zero carbon fuels. It is available in 6L to 9L configurations with a power output of 1.7–3.4 MW and suitable as a main or auxiliary engine.
“The need to decarbonise shipping is driving the industry towards increasingly flexible, electrified and hybridised solutions, with sustainable fuel readiness also being built into newbuild solutions today,” comments Roger Holm, President of Wärtsilä Marine & Executive Vice President at Wärtsilä Corporation. “Our hybrid propulsion systems are designed to allow vessels to run efficiently across various operating modes, adapting seamlessly to changing conditions. This flexibility contributes to improved fuel efficiency and enhances overall performance.”
The Wärtsilä equipment is scheduled for delivery to the yard during the first half of 2027.
Media contact for more information on this release:
Isabella Alder
Positioning and Strategic Communications Manager Wärtsilä Marine
Tel: +44 (0) 7792 681 757
marine.media@wartsila.com
Image caption: Wärtsilä will supply an integrated hybrid propulsion system for a bulk carrier vessel being built at the Royal Bodewes shipyard for Aasen Shipping. This will be the latest in a series of six such vessels – such as the ‘Aasvær’ (see image) – to operate with a similar Wärtsilä scope of supply. © Aasen Shipping
Wärtsilä Marine in brief
Wärtsilä Marine is a global pioneer in power, propulsion and lifecycle solutions for the marine market. We develop industry-leading technologies, advancing maritime’s transition to new fuels. We support building an end-to-end digital ecosystem where all vessels and ports are connected. Ultimately, Wärtsilä Marine is driving the shipping industry forward on its journey towards a decarbonised and sustainable future through our broad portfolio of engines, propulsion systems, hybrid technology, exhaust treatment, shaft line solutions and digital technologies, as well as integrated powertrain systems. Our offering, which is underpinned by our performance-based agreements, upgrades, lifecycle solutions, decarbonisation services, as well as an unrivalled global network of maritime expertise, delivers the efficiency, reliability, safety, and environmental performance needed to support a safe and sustainable future for our customers, our communities and our planet.
www.wartsila.com/marine
Wärtsilä in brief
Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. We emphasise innovation in sustainable technology and services to help our customers continuously improve their environmental and economic performance. Our dedicated and passionate team of 18,300 professionals in more than 230 locations in 77 countries is shaping the decarbonisation of our industries across the globe. In 2024, Wärtsilä’s net sales totalled EUR 6.4 billion. Wärtsilä is listed on Nasdaq Helsinki.
www.wartsila.com
