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Frequently Asked Questions (FAQ)

A list of questions commonly asked about Eco Marine Power, wind & solar power for ships, marine renewable energy, ship solar power, rigid sails and hybrid marine power.

What does Eco Marine Power do?

Eco Marine Power LogoEco Marine Power Co. Ltd. (EMP) is an internationally focused technology company that develops renewable energy based fuel saving and emission reduction solutions for ships including passenger ferries, survey ships, oil tankers, bulk carriers and cargo vessels. These technologies include the patented EnergySail®, Aquarius MAS and the patented Aquarius MRE®.

EMP also develops sustainable ship concepts that incorporate the latest renewable energy technologies and is currently working on a number of design projects including Aquarius Eco Ship and Aquarius Unmanned Surface Vessel (USV). The company is based in Fukuoka, Japan. To read more about what EMP does please see our Company Profile.

Where is Eco Marine Power located?

Our main office is Fukuoka, Japan. Our office address and contact details can be found here.

Is Eco Marine Power seeking investors?

Eco Marine Power Co. Ltd. is a privately held company in Japan and is interested in talking with institutions, companies and possible strategic partners about how they could invest in the future of marine renewable energy technology. Please see our Investor Information section for more details.

Do you only develop solutions for Japan?

No. Eco Marine Power is a globally focused company and we develop solutions to help make world shipping greener. Our working language is English. (but feel free to send us a message in Japanese!)

What is Aquarius MRE?

Aquarius MRE (Marine Renewable Energy) is a ship based wind and solar power solution being developed by Eco Marine Power and its development partners. For more information please see the Aquarius System page.

Is wind power really a viable option on-board large modern ships?

Wind power was used for many centuries to move ships across the oceans but the arrival of the steamship heralded the end of the golden age of the sailing ship.  However today technology like Aquarius MRE provide the means to once again use sails on modern ships in a safe and cost effective manner. You can read more about this topic in Wind and Solar Power for Ships.

How is solar power used on ships and other vessels?

Solar power is used as a means to charge marine batteries on-board vessels or is fed into a ship's power supply system. This helps reduce fuel consumption and in some cases vessels can cruise solely via the power collected from the solar panels. Remember it isn't just the reduced fuel consumption on a ship that helps the environment, but also the energy and resources saved during the whole process of getting fossil fuel to the pier or wharf. Moving less fuel across the globe also saves fuel and reduces pollution. For more information about using solar power on ships please see: Aquarius Marine Solar Power. Solar power or marine solar power can also be an important source of emergency power on a ship and be used to recharge batteries connected to emergency lighting.

Do your designs incorporate biofuel motors etc?

Yes, where possible we try to include biofuels generators or engines into our designs especially when the biofuel can be obtained in such a way as not to impact the production of food crops. (by using for example rice or barley straw)

What is hybrid marine power?

Hybrid marine power (HMP) simply means a power system on-board a ship, ferry or other vessel that obtains energy from more than once source. Please see our HMP section for more information.

Is Eco Marine Power a ship builder?

No, our company does not build ships. We work on concept designs & develop technologies that include renewable energy and hybrid marine power then seek to work with shipyards to deliver cutting-edge eco friendly ships.

What is the Tonbo Solar Hybrid Ferry?

The Tonbo Solar-Electric Hybrid Ferry is a cutting-edge solar ship concept being developed by Eco Marine Power. This eco ferry design will bring together a range of energy saving and emission reduction technologies so that the Tonbo can operate in harmony with the natural environment. For more information about this exciting design project please see the Tonbo HMP Vessel homepage.

Do the rigid sails used by Aquarius MRE use wind energy and collect solar energy as well?

The rigid sails designed by Eco Marine Power will help move a ship by using the available wind plus they may collect solar energy during the day if solar panels are fitted.  The rigid sail technology  developed by EMP is called the EnergySail.

What happens to the EnergySail used by the Aquarius MRE when there is a storm or very strong winds?

The EnergySail is automatically lowered by the computer control system when strong winds are present. The EnergySail can also be lowered by the crew by using a control panel located on the bridge or elsewhere on the ship.

What is a rigid sail? Does it mean the sail does not move?

A rigid sail is simply a sail that does not use a flexible material like cloth to harness the power of the wind. A rigid sail for example could be made out of marine grade aluminium or a carbon fibre composite material. They can also be lowered and stored when a ship is loading/unloading or during storms.

Why should shipping companies,ferry operators and even navies use wind and solar power?

Firstly wind and solar power used onboard ships reduces the use of fossil fuels and this results in less air pollution. So simply put, wind and solar power are better for the environment compared to oil, diesel fuel or LNG etc.  Secondly, less fuel used means reduced operating costs for the owner or operator of ship or boat. In addition passenger ferries can operate in all-electric (eco) mode and this increases passenger comfort since electric motors are much quieter than diesel engines.  There are many also more benefits and we would be quite happy to explain these in more detail to ship builders, designers, owners and operators.

What other products or services does your company have?

We offer a range of products and services including marine batteries, PV systems for ships, data logging marine computer systems and consulting services. For further details please follow this link.

Why not just put big sails on a ship?

Very large sails on a ship can cause big problems just as they did during the age of the sailing ship. Our aim is to use wind power (and solar energy) to supplement a ship's propulsion system in a cost effective way so that the safety of the crew and vessel is not compromised.

I have a media enquiry, who should I contact?

Please use our online enquiry form for any media enquiries or contact our office in Fukuoka.

Can I use pictures from this site in an article I am writing?

Please contact us if you wish to use images or content from this site. All images, pictures & content on this site remain the property of Eco Marine Power Co. Ltd.

Other FAQ's

Aquarius MRE and EnergySail FAQ

Marine Solar Power Solutions FAQ

Marine Batteries and Ship Batteries FAQ


Please note: Aquarius MRE, Aquarius USV, Aquarius MAS, EnergySail, Aquarius Eco Ship and Eco Marine Power logo are trademarks of Eco Marine Power Co. Ltd.


Key Findings from Ship Solar Power Study Released

Key Findings from Ship Solar Power Study Released

5 year study conducted on-board ships, in test lab & at outdoor evaluation area Fukuoka, Japan – 16th July 2018 – After an extensive study project, Eco Marine Power (EMP) has today released some of the key findings related to the use of solar power on ships and the selection and installation of related equipment. This study was carried out over a 5 year period and included: installation of a trial system on the high speed RoRo Ferry Blue Star Delos, several ship surveys, computer-aided analysis, plus ... Read more
Eco Marine Power Announces Launch of Hybrid Battery Packs

Eco Marine Power Announces Launch of Hybrid Battery Packs

UB-50-12 battery packs with proven hybrid technology ready for use on ships & offshore platforms. Fukuoka, Japan – 29th June 2018 – In co-operation with its strategic partners Furukawa Battery and Teramoto Iron Works, Eco Marine Power (EMP) has today announced the release of two UB-50-12 hybrid battery packs for ship, offshore and land-based renewable energy projects. These safe, reliable and recyclable battery packs will be available in 2.4kWh and 3.6kWh configurations. Multiple battery packs can be instal... Read more
Eco Marine Power at Sea Japan 2018

Eco Marine Power at Sea Japan 2018

First public display of an EnergySail & Hybrid Battery Pack Eco Marine Power (EMP) along with strategic partners Teramoto Iron Works and The Furukawa Battery Company recently exhibited a range of products & technologies at Sea Japan 2018 in Tokyo. A small EnergySail lab prototype was also publicly displayed for the first time along with its Automated Control System (ACS).  The patented EnergySail is a rigid sail device developed by EMP that will allow ships to harness the power of the wind and sun i... Read more
Eco Marine Power Expands Aquarius Eco Ship Project

Eco Marine Power Expands Aquarius Eco Ship Project

Innovative low emission ship design project to be opened up to more technologies & companies Fukuoka, Japan – 19th April 2018 – Eco Marine Power (EMP) unveiled today its plan to widen the scope of the Aquarius Eco ShipTM project and invite other companies to join this innovative low-emissions ship design initiative. As part of this plan a wider range of technologies will be studied including fuel cells, air lubrication systems & electrical propulsion plus ship owners that are already in-directly connect... Read more
Star Bulk and Eco Marine Power Commence Renewable Energy Study

Star Bulk and Eco Marine Power Commence Renewable Energy Study

Joint study focused on feasibility of installing technologies associated with Aquarius MRE onto existing and new ships Fukuoka, Japan – 21st March 2018 – As part of its continued focus on bringing renewable energy solutions to shipping, Eco Marine Power (EMP) announced today that it has signed a Memorandum of Understanding (MOU) with Star Bulk S.A. (Star Bulk) covering a joint study project focused on the feasibility of using EMP’s technologies on existing and new bulk carriers. The joint study between Star... Read more
Furukawa Battery Certified as Approved Supplier of Marine Batteries

Furukawa Battery Certified as Approved Supplier of Marine Batteries

Certification obtained after factory inspection, evaluation trials & testing by Eco Marine Power Fukuoka, Japan – 19th February 2018 – Eco Marine Power (EMP) today announced that it has formally certified The Furukawa Battery Co., Ltd. of Japan, as a supplier of batteries for use on ship and marine structures. The certification covers a range of batteries technologies including the hybrid valve regulated lead acid (VRLA) UltraBattery®. Furukawa Battery and EMP first began to co-operate in 2014 and teame... Read more
Eco Marine Power and Teramoto Iron Works Sign Patent License Agreement

Eco Marine Power and Teramoto Iron Works Sign Patent License Agreement

Agreement paves the way for commercial production of EnergySail and Aquarius MRE Fukuoka, Japan – 23rd January 2018 – In another major step towards bringing rigid sails onto powered ships, Eco Marine Power (EMP) announced today that it has signed a patent license agreement with Teramoto Iron Works Ltd concerning patents related to EMP’s EnergySail® and Aquarius MRE® technologies. Teramoto Iron Works is one of the few companies in the world that has experience in the production of rigid sails and was involve... Read more
Eco Marine Power to Study Use of Artificial Intelligence in Research Projects

Eco Marine Power to Study Use of Artificial Intelligence in Research Projects

Neural Network Console provided by Sony Network Communications to be utilised to improve control algorithms and analyse research data Fukuoka, Japan – 8th December 2017 – To further enhance its research capabilities Eco Marine Power announced today that it will begin using the Neural Network Console provided by Sony Network Communications Inc., as part of a strategy to incorporate Artificial Intelligence (AI) into various ongoing ship related technology projects including the further development of the patented... Read more
Aquarius MRE Project and Shipowner Prepare for Sea Trials

Aquarius MRE Project and Shipowner Prepare for Sea Trials

World first deployment of patented rigid sail and solar power system to commence during 2018 Fukuoka, Japan – 26th July 2017 – Eco Marine Power (EMP) is pleased to announce that it has begun preparing for sea trials of its Aquarius Marine Renewable Energy (MRE) solution in co-operation with strategic partners and ship owner Hisafuku Kisen K.K. of Onomichi, Japan. This preparatory work will lead to the world’s first installation of an integrated rigid sail and solar power system for ships using EMP’s patented te... Read more
Eco Marine Power Signs MOU for Supply of Aquarius MAS + Solar

Eco Marine Power Signs MOU for Supply of Aquarius MAS + Solar

Fukuoka, Japan – 18th May 2017 – Eco Marine Power (EMP) announced today that it has signed a Memorandum of Understanding (MOU) with a Singapore based shipping company to supply its Aquarius Management and Automation (MAS) + Solar solution. The solution will also include hardware and software that will allow ships to monitor fuel oil consumption in real time, automatically calculate NOx/SOx/CO2 emissions and interface with marine solar power systems. Initially one ship in the fleet will be installed with the... Read more
Hybrid marine power solutions save fuel, reduce pollution and are cost effective. Eco Marine Power is at the forefront of developing low emission & fuel efficient solutions for shipping and has a range of innovative technologies available now. Our computer systems also provide a control interface between renewable energy & other power systems on-board ships.
Eco Marine Power is at the forefront of developing and supplying innovative marine renewable energy technologies for shipping which harness the power of the sun & wind. These solutions include our Aquarius MRE, EnergySail & Aquarius Marine Solar Power. These solutions reduce fuel consumption, lower noxious gas emissions and deliver cost benefits.
The Aquarius Management and Automation System or Aquarius MAS is a cost effective alarm handling, monitoring, process handling and data logging platform suitable for a wide range of ships. The system is based upon the reliable and robust KEI 3240 Data Logger and is class approved. The Aquarius MAS can also monitor fuel use & calculate vessel emissions.

Finding the right solar, wind, electric or hybrid marine power solution can be a daunting task so Eco Marine Power works with shipyards and ship owners to help them find the best system for their needs. EMP also developments low emission & sustainable shipping concepts and designs using marine renewable energy technologies & advanced computer systems.
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