Shore power solutions from Wärtsilä reduce fuel consumption and emissions by enabling vessels to plug in to the onshore electricity grid when in port instead of using auxiliary engines to generate power. With vessel owners seeking new ways to decarbonise and achieve compliance, a ship shore power system is quickly becoming standard in new build vessels and a popular retrofit option for existing vessels too.
Alternative Marine Power (AMP) while in port allows the vessel to turn off the genset and take power from shore, which reduces emissions and fuel consumption in port.
The AMP solution is most common in container and cruise vessels, but also used for RoRo, LNGC, tankers, ferries and mega yachts.
Charging of an on board energy storage system, usually batteries either as a fully electric or hybrid vessel. This option can be applied either with a wireless inductive charging system or automated/manual plug in system. Both options allow a vessel to operate on batteries only - enabling zero emission sailing.
This solution is often used for shorter journey lengths such as tugs or ferries or on defined routes with fixed ports where the charging terminal can be installed.
Technology group Wärtsilä will supply an integrated hybrid propulsion system for two new hybrid RoRo vessels. The ships are being built at the China Merchants Jinling shipyard (Weihai) Co., Ltd for the Swedish shipping company Stena RoRo. The ships will be the world’s first methanol fuelled hybrid RoRo vessels and will operate in the Stena Line Irish Sea system. The combination of new sustainable fuels and electrification is in line with the company’s sustainable operations target. Part of the order was booked by Wärtsilä in Q2 2023, while the remaining order was booked in Q3 2023.
Each vessel will be equipped with two Wärtsilä 32M multi-fuel engines capable now of operating on methanol fuel and with ammonia ready notation. Wärtsilä will also supply the methanol engine auxiliary equipment, the gearboxes, two controllable pitch propellers (CPP), three bow thrusters, the NACOS navigation system, three Wärtsilä 20 auxiliary engines, and the hybrid electric system consisting of shore power, batteries, shaft generators, converters, transformers as well as the Energy Management System making it all work together.
Each vessel will also benefit from the Wärtsilä Hybrid Solution, optimising the fuel consumption today and allowing for future full green operation. The vessels will also be equipped with Wärtsilä shore power solution enabling carbon-free operations when the vessels are in port.
“These vessels are a further development of our previous cargo ship concepts where the focus on sustainability and future-proofing with multi-fuel combustion engines are prioritised,” says Per Westling, Managing Director of Stena RoRo. “With the help of Wärtsilä’s advanced technology, we intend to have the greenest Ro-Ro vessels on the market.”
“We are proud to be supporting these innovative hybrid vessels with our methanol fuelled engines and electrification systems. Both Stena RoRo and Wärtsilä share the same commitment to decarbonising shipping operations, and these vessels represent a further step in this direction by being the first methanol hybrid ships in their class. Not only will the emissions be minimised, but they will also have the most efficient energy utilisation during operations,” commented Roger Holm, President of Wärtsilä’s Marine Power business.
The 147 metre long ships will have 2,800 lane metre capacity and will be able to accommodate a total of 37 passengers and crew. They are scheduled for delivery in June and November 2025. The Wärtsilä equipment will be delivered to the yard in 2024.
Wärtsilä has a strong relationship with Stena RoRo, and as early as 2015 Wärtsilä converted the Stena Germanica to operate on methanol fuel. The two companies are currently cooperating on a number of other Ro-Pax projects.
Media contact for more information on this release:
Positioning and Strategic Communications Manager
Wärtsilä Marine Power
Tel: +44 (0) 7792 681 757
Image(s) caption: Wärtsilä will supply an integrated hybrid propulsion system for two new hybrid RoRo vessels (illustrated - © Wärtsilä Corporation). The ships will be the world’s first methanol fuelled hybrid RoRo vessels and will operate in the Stena Line Irish Sea system (illustrated - © Stena Roro).
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 17,500 professionals in more than 240 locations in 79 countries shape the decarbonisation transformation of our industries across the globe. In 2022, Wärtsilä’s net sales totalled EUR 5.8 billion. Wärtsilä is listed on Nasdaq Helsinki.
Wärtsilä Marine Power in brief:
Wärtsilä Marine Power is a global leader in power, propulsion and lifecycle solutions for the marine market. From our end-to-end digital ecosystem planningto our future fuels development, Marine Power is driving the shipping industry forward on its journey towards a decarbonised and sustainable future. Our broad portfolio of engines, digital technologies, propulsion systems, hybrid technology, and integrated powertrain systems delivers the efficiency, reliability, safety, and environmental performance needed to support our customers. Our offering includes real-time insights into operations, performance, and energy use,performance-based agreements, lifecycle solutions, and an unrivalled global network of maritime expertise.
Using renewable power via a shore connection is a great way to reduce your emissions. You will find 49 more ways in a fascinating eBook “50 great ways the maritime industry could cut its greenhouse gas emissions”. Learn more: