- Wärtsilä’s Fit4Power solution will upgrade the ONE Maestro to improve engine efficiency and reduce fuel consumption by about 13%.
- The retrofit includes new turbochargers, an ICC system, and cloud-based monitoring tools to enhance performance and maintenance.
- The vessel’s CII compliance could be extended by four years, with annual CO₂ savings estimated at 4,000 tons.
- Since its 2023 launch, Fit4Power has been installed on 17 ships, supporting the maritime industry’s push toward decarbonization.
Wärtsilä has secured an order to supply a conversion package for the containership ONE Maestro, featuring its Fit4Power derating solution. Designed to optimize engine power output, the technology aims to cut fuel consumption by an average of 13%, helping to lower emissions and improve operational efficiency. The conversion is also expected to extend the vessel’s service life. The vessel is owned by Ocean Network Express and managed by ONESEA Solutions. The order was confirmed in the first quarter of 2025.
Fit4Power Retrofit to Improve Efficiency and Extend CII Compliance
The ONE Maestro, a 6,700 TEU containership originally built for speeds up to 27 knots, now operates at reduced speeds to align with fuel efficiency and regulatory targets such as the IMO’s Carbon Intensity Indicator (CII). To further improve its performance, the vessel will undergo a retrofit with Wärtsilä’s Fit4Power derating solution.
This system involves technical modifications, such as reducing the engine’s bore size, to deliver a leaner, more efficient engine. The upgrade is expected to enhance engine efficiency, lower cylinder lubrication oil consumption, and extend the vessel’s CII compliance period by around four years. Annual carbon dioxide emissions could be reduced by approximately 4,000 tons.
According to Ocean Network Express, the retrofit supports their sustainability objectives while maintaining vessel performance and reflects their ongoing commitment to investing in efficient technologies across the fleet.
Integrated Technologies to Support Emissions Reduction
As part of the ONE Maestro retrofit, Wärtsilä will supply two new turbochargers and its Intelligent Combustion Control (ICC) system. These components will be integrated with the Wärtsilä Data Collection Unit (WDCU), enabling cloud-based services and remote monitoring to support operational efficiency, fuel economy, and timely maintenance. The package also includes Wärtsilä’s Expert Insight, a predictive maintenance solution, and remote operational support services. Delivery of the equipment is scheduled for June 2025.
Wärtsilä emphasizes the need for immediate action as the maritime industry targets net-zero emissions by 2050. Since its commercial launch in early 2023, the Fit4Power solution has been installed on 17 vessels, with more conversions underway. Growing interest in such upgrades reflects the shipping industry’s ongoing push toward more sustainable operations.
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Source: Wärtsilä
