Wärtsilä to supply Fit4Power solution to containership ONE Maestro
Wärtsilä has been enlisted to supply a conversion package featuring its Fit4Power radical derating solution for the containership, ONE Maestro.
According to the company, the Fit4Power radical derating solution optimises the engine’s power output, resulting in an average fuel consumption reduction of approximately 13%, and subsequently decreasing emissions.
The conversion is anticipated to prolong the vessel’s operational lifespan.
Owned by Ocean Network Express (ONE) and managed by ONESEA Solutions, the ship’s conversion order was booked by Wärtsilä in the first quarter of 2025.
A 6,700 TEU vessel, ONE Maestro is designed for speeds of up to 27 knots.
In line with regulatory requirements, such as the IMO’s Carbon Intensity Indicator (CII), the containership is stated to currently operate at fuel-efficient, reduced speeds.
Wärtsila stated that ONE Maestro’s performance will be further improved by the Fit4Power solution. The containership will be equipped with a “leaner, healthier” engine through technical adjustments, such as reduced bore size.
With improvements in engine efficiency, the ship’s CII compliance is expected to potentially extend by around four years. This enhancement is anticipated to result in annual CO2 savings of approximately 4,000t. Additionally, there will be a reduction in the consumption of cylinder lubrication oil, added the company.
Ocean Network Express global chief officer, head of product and network division Hiroki Tsujii said: “Wärtsilä’s Fit4Power derating solution aligns with ONE’s operational needs. By optimising engine power output while reducing fuel consumption, Wärtsilä is supporting ONE to achieve our sustainability goals without compromising performance.
“This technology represents a practical approach to extending our vessel’s CII compliance as we continue to enhance our fleet operations. ONE will continue to invest in innovative technologies and our fleet, as we work towards our long-term sustainability goals.”
Wärtsilä’s conversion package includes two new turbochargers and its Intelligent Combustion Control (ICC) system.
These integrated technologies will be backed by Wärtsilä’s Data Collection Unit (WDCU), facilitating cloud-based services and remote monitoring aimed at optimising performance, fuel efficiency, and scheduled maintenance.
The package will also include Wärtsilä’s digital predictive maintenance service Expert Insight, along with remote operational support.
The delivery of the Wärtsilä equipment is slated for June this year.
Since the commercial launch of Fit4Power in 2023, the solution has been retrofitted on 17 vessels, with more planned for delivery.
Wärtsilä Marine vice president for parts & field service Stefan Wiik said: “In just 25 years, shipping has a goal of reaching net zero emissions by 2050. Therefore, operators need to use all the tools in the toolbox to ensure that this transformation happens as quickly as possible.
“Improving engine efficiency – with solutions such as our Fit4Power solution – provides a valuable way for the industry to accelerate the decarbonisation journey of the existing fleet today.”
Wärtsilä recently announced the tests results on its 4-stroke ammonia engine, which showed up to a 90% reduction in GHG emissions compared to conventional diesel engines.
