Siemens Energy has contracted EST-Floattech to supply the battery system for a “CSOV Plus”, a new Commissioning Service Operation Vessel for Marco Polo Marine. EST-Floattech will supply Octopus HE modules with a capacity of more than 1 MWh, supporting the vessel’s hybrid and dynamic positioning (DP) operations.
Marco Polo Marine is building the vessel at its own shipyard in Batam, Indonesia. Siemens Energy acts as system integrator for the vessel’s hybrid power plant. It is EST-Floattech‘s first project in Singapore and Taiwan.
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Designed for two sectors
The CSOV Plus, designed by Salt Ship Design (Norway), is the first CSOV developed from the outset for operations in both offshore wind and oil and gas. It combines a 100-tonne active heave compensated crane and a motion-compensated gangway for walk-to-work transfers in significant wave heights of up to 3.0 metres with a hull and propulsion configuration optimised for station-keeping.
Construction started in Batam in the second quarter of 2026. Delivery is scheduled for the second quarter of 2028.
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Battery support for hybrid and DP operations
On board, the Octopus High Energy system works alongside the vessel’s generator sets and Siemens Energy’s BlueDrive PlusC. During DP operations, the batteries provide spinning reserve and absorb load variations, so fewer generators need to run and those that do run operate closer to their optimum load.
Sustainability was a design requirement from the start. The CSOV Plus has been laid out so that its battery capacity can later be extended to a 20-MWh package, allowing the vessel to sail fully electric. The modular architecture of the Octopus Series makes that upgrade possible on the same platform: additional modules are added to the existing battery management system, in the space reserved in the design.
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At work in Taiwanese offshore wind
Once delivered, the CSOV Plus will be operated by PKR Offshore (PKRO), Marco Polo Marine’s Taiwan-based subsidiary, which supports the offshore wind market in Taiwan with a fleet of offshore vessels. PKRO will deploy the vessel for Siemens Gamesa under a multi-year framework agreement covering offshore wind projects in Taiwanese waters. PKR Offshore’s first CSOV, MP Wind Archer, is already in service in Taiwan since 2025.
Picture: The CSOV Plus that will be equipped with the EST-Floattech Batteries (image Salt Ship Design).
