Siemens Energy has appointed EST-Floattech to supply its Octopus High Energy battery system for a new Commissioning Service Operation Vessel ordered by Marco Polo Marine, sources indicated on 1 October 2026. The vessel, described as a CSOV Plus, is being constructed at Marco Polo Marine's own shipyard in Batam, Indonesia, and Siemens Energy will act as system integrator for the ship's hybrid power plant.
The contract places EST-Floattech in charge of delivering the battery package named Octopus High Energy for the vessel. Sources noted the supplier selection and the roles of the principal companies involved but did not publish further technical specifications in the account summarised here.
System integration and battery package
Siemens Energy's role is that of system integrator for the hybrid power plant fitted aboard the CSOV Plus. In that capacity the company will coordinate the integration of the battery package supplied by EST-Floattech with the vessel's wider power and propulsion systems.
EST-Floattech is to supply a package of its Octopus High Energy battery equipment for installation on the CSOV Plus. The reporting identifies the battery system by name and situates it within the hybrid plant for which Siemens Energy will take overall integration responsibility.
Shipyard and vessel
Marco Polo Marine is building the CSOV Plus at its own yard in Batam, Indonesia. The vessel is described as a Commissioning Service Operation Vessel, commonly used to support offshore wind and subsea commissioning, and the project brings together the shipowner, a system integrator and a battery supplier.
Marco Polo Marine's decision to execute the build at its Batam facility means the shipyard will oversee construction while suppliers and integrators supply and fit the specialised systems. The report makes clear the work is a coordinated supply and integration exercise rather than a simple equipment sale.
Key facts
- Buyer and integrator: Siemens Energy will act as system integrator for the CSOV Plus hybrid power plant.
- Equipment supplier: EST-Floattech will deliver a package of Octopus High Energy battery equipment.
- Vessel and location: the CSOV Plus is being built by Marco Polo Marine at its shipyard in Batam, Indonesia.
The announcement as reported on 1 October 2026 outlines the commercial relationships but stops short of publishing delivery timetables, battery capacity figures or on-board electrical architecture. Readers seeking fuller technical detail will need to consult the parties directly or wait for further public statements.
The collaboration brings together a shipowner with in-house shipbuilding capability, a global energy systems company serving as integrator, and a specialist battery supplier. Sources carried the original report on 1 October 2026, from which the above summary is drawn.
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