Low Emission Water Transport Solution for Green Cities

The Tonbo solar hybrid ferry is a cutting-edge low emission passenger ferry being developed by Eco Marine Power.

tonbo_solar_hybrid_ferry_web1The Tonbo is being designed to take advantage of the latest advances in hybrid marine power, energy storage and solar module technologies in addition to using unique design concepts developed by Eco Marine Power.

Tonbo means dragonfly in Japanese and the name was chosen because it reflects the wing-like manner by which the solar modules are mounted on the vessel and the resemblance the front area of the vessel has to the eyes of the insect.

The overall design will allow the vessel to be configured for a variety of applications and also enable the solar-electric hybrid power system to be applied to various types of ferries, work boats and other vessels. The movable solar panel array will allow the vessel to move under low bridges and also be configured so that they can take full advantage of the available solar energy.

The Tonbo will use electric motors to provide propulsion with the on-board electricity being provided via a system of generators, batteries and solar modules. An on-board rapid charging system will enable Tonbo to rapidly recharge it's batteries when alongside even for relatively short periods in addition to them being charged as needed via the solar modules and generator.

Tonbo Solar-Electric Hybrid Ferry - Preliminary Specifications


Length 30 metres Cruising Speed 12-14 knots
Beam 8 metres Solar Marine grade flexible panels
Draft 2 metres Energy Storage Hybrid battery modules
Height 4 metres Propulsion Solar-electric hybrid marine system
Passengers 200-250 Systems Aquarius MAS
Vessel Type Monohull Construction Aluminium


Other Features:

  • Observation deck.
  • Rapid battery re-charging technology.
  • Eco-mode (all electric operation) function.

Concept by Greg Atkinson. Eco Marine Power. All rights reserved.


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Hybrid marine power solutions including solar power save fuel, reduce pollution and are cost effective. Eco Marine Power is at the forefront of developing low emission & fuel saving solutions for ships, Our computer systems also provide a control interface between renewable energy & other systems on-board ships.
Eco Marine Power is at the forefront of providing innovative marine renewable energy technologies for shipping that harness the power of the sun & wind. These solutions include Aquarius MRE, EnergySail & Aquarius Marine Solar Power. These reduce fuel consumption, lower noxious gas emissions and deliver cost benefits.
Aquarius Management & Automation System or Aquarius MAS is a cost effective alarm handling, monitoring & data logging platform suitable for a wide range of ships. The system is based upon the reliable KEI 3240 Data Logger and is class approved. Aquarius MAS can also monitor fuel use & calculate vessel emissions.
Our design & consulting services include green ship & eco ship concept designs, renewable energy surveys, renewable energy systems design & consulting support for new ship and retrofit projects. We work with ship owners, ship managers and ship yards to develop the right renewable energy solution for their needs.
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