A new
standard for a greener maritime sector

A new ISO standard for assessment of the energy efficiency of ships machinery, electrical installations, equipment, components, and systems.

An international standard for the assessment of the energy efficiency of ships’ machinery, electrical installations, equipment, components, and systems.


An international maritime standard with the purpose of increasing the energy efficiency of the global fleet. This standard will contribute positively toward several known challenges.


Pave the way to enhance the energy efficiency of the ships in terms of bringing down the EEDI/EEXI values, thereby leading to further reduction of GHG emissions.

Economic savings

Lower fuel consumption of the vessel has a direct link to the vessel OPEX. Lower fuel consumption can result in increased competitiveness.


A tool for the industry to fulfill the rules and regulations developed due to the short-term, medium, and long-term measures of the IMO and future EU regulations


The new standard will be developed in cooperation with a range of international experts in ISO


Environmental concerns, emission regulations, fuel prices, and emission taxes increase the demand to improve energy efficiency in shipping.

International Maritime Organization (IMO) adopted in 2013 the mandatory Ship Energy Efficiency Management Plan (SEEMP) to significantly decrease the amount of CO2 emissions by 10% to 50% per transport work from international shipping. This strategy incorporates a specific reference to a pathway of CO2 emissions reduction consistent with the Paris Agreement temperature goals, alongside the United Nations’ 2030 Agenda for Sustainable Development.

Energy efficiency is crucial in the shipping industry – both from a financial perspective and in connection with the overall green transition agenda.

In practice, however, it can be extremely difficult for shipping companies and shipyards to assess which components, systems, and solutions are actually the most energy-efficient and hence the best purchase, though this is crucial knowledge when building new ships and refurbishing existing ones.

For this reason, Danish Standards, ReFlow Maritime, and Danish Maritime have come together to develop a new ISO standard for the energy efficiency level of maritime equipment. If motors, electrical installations, equipment, components, and systems are not compared based on uniform criteria, it may consequently in many cases be practically impossible to know if the best and most energy-efficient product has been selected.

Three main categories of stakeholders were identified that can benefit from the standardization of the energy efficiency of maritime systems:

  • Shipowners in energy-efficient maritime systems in order to meet reduction requirements and to comply with IMO SEEMP initiatives.

  • Maritime equipment & engine manufacturers are responsible for the design and production of ship systems. A standard will provide a harmonized assessment and enable objective benchmarking and verification.

  • Governments that are committed to environmental regulations and different environmental targets such as “levels of ambition” adopted by IMO.

The new standard will become an important tool for shipping companies and manufacturers to objectively assess the energy efficiency of maritime systems worldwide. Denmark is one of the most significant maritime nations in the world, and therefore it seems natural that we are at the forefront of the development of new international requirements and contribute to driving the maritime sector towards a more sustainable future. We hope that the standard will help to strengthen and future-proof the Danish maritime sector in a world where sustainability and the ability to deliver and use climate-friendly solutions are increasingly important.


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Energy Efficiency

The International Electrotechnical Commission (IEC) defines Energy Efficiency (EE) as the ratio between an output of performance, service, goods, or energy, and an input of energy taking into account the driving parameters and the boundaries. The proposed standard can serve as a building block for further developments within maritime efficiency activities.


The road toward a new ISO standard for energy efficiency in the maritime industry requires input and collaboration from multiple stakeholders in a maritime value-chain. The development includes valuable technical input from shipowners, equipment manufacturers, and service providers.

DFDS wants to become climate neutral by 2050 and are aiming for a relative reduction of Greenhouse Gas (GHG) emissions by close to 45% from 2008 to 2030. That corresponds to an approximate reduction of 25-35% between 2019 and 2030. These are the main goals in DFDS’ new climate action plan.
C.C.JENSEN – the global leader in oil maintenance with more than 60 years of experiences – designs and manufactures CJC® Oil Filtration solutions for removal of particles, water, acidity and oil degradation products (varnish) from hydraulic oils, lube oils, gear oils, diesel fuels etc.
DESMI is a global company specialized in the development and manufacture of pump solutions for marine, industry, oil spill re­sponse, defence and fuel, and utility uses. Their pumps are characterized by first class design and recognized by our customers as reliable, efficient, functional and durable.


    OCTOBER 2020

    Funding granted by the Danish Maritime Fund and a steering committee is established


    A workshop held with more than 75 participants from the maritime sector took part. A group of technical experts is established to help develop the content of the new standard

    MARCH 2021

    A draft proposal for a new standard is submitted to ISO for ballot

    SUMMER 2021

    The ISO ballot to approve the new work item is taking place.

    FALL 2021

    If the ballot is successful, the work on the new ISO standard is started and expected to last for the next 35 months (approximately).


    The new ISO standard for Maritime Energy Efficiency is published.

    Project partners

    This project is funded by
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