Siemens Energy selects EST-Floattech to supply Octopus High Energy battery system for Marco Polo Marine’s CSOV Plus

Siemens Energy has selected EST-Floattech to supply the battery system for a new Commissioning Service Operation Vessel (CSOV Plus) being built at its shipyard in Batam, Indonesia. The CSOV Plus is designed by Salt Ship Design and is intended for operations in both offshore wind and oil & gas sectors. It features a 100-tonne active heave compensated crane and a motion-compensated gangway, as well as a hull and propulsion configuration optimized for station-keeping.

The CSOV Plus will undergo construction in the second quarter of 2026, with delivery scheduled for the second quarter of 2028.

The Octopus High Energy battery system, supplied by EST-Floattech, will work alongside the vessel's generator sets and Siemens Energy's BlueDrive PlusC. During dynamic positioning (DP) operations, the battery system provides spinning reserve and absorbs load variations, reducing the need for generators to run and ensuring those that do operate closer to their optimum load.

Sustainability was a key design requirement for the CSOV Plus, as the vessel is intended to be capable of sailing fully electric in the future. The CSOV Plus has been designed with a modular architecture, allowing its battery capacity to be extended to a 20 MWh package, which will enable the vessel to sail fully electric. EST-Floattech's proven track record in maritime electrification and the Octopus High Energy system's fit with the CSOV Plus's operational profile were key factors in Siemens Energy's decision to choose them as their supplier.

The CSOV Plus will be operated by PKR Offshore, Marco Polo Marine's Taiwan-based subsidiary, which supports the offshore wind market in Taiwan with a fleet of offshore vessels. PKR Offshore will deploy the CSOV Plus for Siemens Gamesa under a multi-year framework agreement covering offshore wind projects in Taiwanese waters. The vessel's first CSOV, MP Wind Archer, is already in service in Taiwan since 2025.

EST-Floattech expressed gratitude for the trust placed in them by Siemens Energy and Marco Polo Marine, as well as their partnership with Durapower, and looks forward to seeing the CSOV Plus in action in Taiwanese waters.