Electric Propulsion

You Should Know

Full electric and hybrid systems​ are easy to scale and allows integration into various different systems!

BOS’s POEM believes that fuel flexibility is one of the keys to meeting the decarbonisation challenge in marine industry. The fuels of today may not be the fuels of tomorrow, therefore having a picture of the entire fuel ecosystem is vital, as owners, operators, and the industry itself will find it much tougher to adapt to a low-carbon future if they are locked into a single choice. While LNG or LNG-ready ships are the highest preferred marine fuel choice for the future, BOS believes the interim transition from fossil fuel to alternate clean energies will see the vast adoption of battery-assisted vessels, which are now being installed on almost every single segment of the global merchant fleet. Battery-powered ships include fully electric vessels, and chargeable and non-chargeable hybrids. The take-up has been strongest in the ferry sector, followed by OSVs to date.

Hence BOS engages in R&D activities towards   the   design   and   construction   of   marine hybrid   electric   propulsion vessels to address emissions around Singapore waters. BOS’s SEPS (Smart Electric Propulsion System) is aimed to electrify complex machinery, achieving not only reductions in CO2, and other emissions levels, but also improving productivity and energy efficiency. SEPS serves as a EMS (Energy Management System) in interfacing the hybrid/full electric notation with the entire power management system (PMS) onboard the vessels. SEPS/EMS automates with the ship’s PMS and maximises the use of battery and Motor powerdrive train  technologies to reduce fuel consumption, emissions and maintenance cost, and the combination of these technologies makes the EMS the heart of the system. SEPS/EMS monitors the powerflow from motor drives and the energy storage capacity in the batteries and will select the optimum time to use the batteries to supplement power from the auxiliary engines or to allow engines to be switched off completely, with power coming from the motor and batteries alone. This improves the load on the engine running for the minimum number of hours but at the optimum fuel consumption, where any excess of energy not needed by the vessel can be used to recharge the batteries.

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BH Global, BOS, Penguin International and other strategic partners sign a MoU for the joint development of Singapore’s first plug-in hybrid electric propulsion fast launch for the local maritime industry.

On the 11th February 2020, BOS Offshore & Marine Pte Ltd has entered into a Memorandum of Understanding (“MoU”) with strategic project partners Penguin International Limited, Danfoss, Durapower Technology (Singapore) Pte Ltd and Bureau Vitas Marine (Singapore) Pte Ltd for the joint design, development and construction of Singapore’s first plug-in hybrid electric fast launch. The scope of cooperation includes integrating hybrid electric solutions, testing and certification. The know-how generated will support Singapore’s push towards the adoption of hybrid electric propulsion systems for its maritime industry.


Under the MoU, the five parties will contribute their respective expertise into the collaborative relationship:

1. BOS will provide technical and commercial expertise in the development of commercially viable Plug-in Parallel Hybrid Electric Propulsion Systems (“BOS EP System”) for small-to-medium sized vessels for operation in and around Singapore.

2. Penguin International, a leading designer, builder, owner and operator of aluminium high-speed vessels, will design, construct and commission a newbuild hybrid launch boat with the BOS EP System installed, and will operate the vessel on commercial routes.

3. Danfoss and Durapower will support the testing and integration of their power drive trains and energy storage systems respectively with the BOS EP System.

4. BV will review and endorse test facilities and procedures necessary towards certification of the BOS EP System. The hybrid launch will be classed by BV as a hybrid vessel.

In addition, BOS will spearhead further collaborations to develop the BOS Marine Electric Integration Centre, and drive initiatives towards the digitalisation of vessel operations with data analytics capabilities and smart connectivity features, and the development of a complete electrification ecosystem in Singapore.

This collaboration provides the Group with a clear roadmap towards realising its goal of becoming a leading player in the Singapore maritime industry’s drive towards achieving global standards on carbon emission reductions. The Group intends to achieve this by offering environmentally sustainable solutions and expertise, with continual efforts on research and development and collaborations with local homegrown companies.


Electric Motors
Highest Efficiency

  • Synchronous reluctance assisted permanent magnet (SRPM) - maximum torque from any speed, even from standstill
  • Liquid-cooled
  • Designed to work in harsh operating environments
  • Reduced noise and maintenance
  • Available both as generators and motors
  • Available with various speed ranges

Electric Converters
Power Control

  • Supports various communication protocols e.g. CANopen, SAE J1939
  • Customizable software functionality with CODESYS IEC61131-3
  • Easy to integrate into other software and systems
  • License-free programming tool
  • Essential technology by Danfoss Editron, external casing provided by Semikron and is nowadays the industry standard across all manufacturers

Case study
Ferry Happiness - Taiwan

Builder: Jin Harng Enterprise Co., Ltd
Type: Electric Hybrid
Delivery: 2016


  • EM-PMI electric motors
  • EC-C inverters
  • EC-C DC/DC converter
  • EC-C LCL filter


  • Halve daily fuel consumption
  • Up to 50% emission reduction
  • Significantly reduces operational noise
  • Electric propulsion significantly lowers maintenance costs


The information contained in this website is for general information purposes only. The information is provided by our affiliate partner Editron.