Nautical Integrated Hybrid Energy System for Long-haul Cruise Ships

  Harmony of the Seas built by CdA and operated by RCL UK with awards on efficient energy system integration designs (Source: GRANT AGREEMENT NUMBER 861647 — Nautilus) Copyright: © GRANT AGREEMENT

Maritime transport is among the leading sources of greenhouse gases and pollutants. To address these challenges, the Horizon 2020 project Nautilus (short for: ‘Nautical Integrated Hybrid Energy System for Longhaul Cruise Ships’) aims at developing, evaluating and validating a highly efficient and dynamic integrated marine energy system fueled by Liquefied Natural Gas (LNG) for long-haul passenger ships. This energy system, responsible to cater for all heat & power needs of a vessel, consists of a high power density Solid Oxide Fuel Cell (SOFC) and a Li-ion battery hybrid genset. It is coupled with the existing Internal Combustion Engine (ICE) based generators.

Together with the project partners, ISEA develops a battery management unit to operate the battery within the safe operating window. The electronics will be equipped with additional functions such as predictive algorithms. Furthermore, a control unit for the hybrid power genset will be developed, which contains the control strategy to perform the energy management of the hybrid power, distributing the demanded power to the propulsion components. Finally, the developed components and algorithms will be embedded into the cruise ship's electrical network.



Cem Ünlübayir

Battery System Technology and Vehicle Integration


+49 241 80-49403



The project will develop and deliver a complete process design and digital demonstrator of a fully integrated on-board energy system of a size between 5 and 60 MW for two types of cruise ships: 1000 and 5000+ passenger vessels. The project brings in a consortium of key actors in maritime passenger transport including ship operators, ship builders, marine engine builder, marine regulatory companies, and technology developers supported by research organizations from across Europe. Together they target to validate this integrated energy system to comply with greenhouse gas-emission targets. Besides, regulatory framework, emission analysis, lifecycle assessment and feasibility of fuel flexibility are addressed.

Link to the video: Nautilus



01st July 2020 – 30th June 2024




This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 861647



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