Electric propulsion system for boats Electric propulsion system for boats Electric propulsion system for boats
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Electric propulsion system for boats


Electric propulsion system for boats


Electric propulsion system for boats

The electric motor Navigaflex standard INBOARD and OUTBOARD
  • One concept and dimension for the IN- and OUTBOARD configuration
  • A retractable (380mm) and rotating (360°) motorized propeller
  • A standard motor with the power of 4KW (8HP)
  • A “booster” to double the power to 8 KW (16 HP) during 2 minutes
  • Four options of motorization of 6, 8, 10, 15 KW (12, 16, 20, 30 HP) continuously
  • Option to configure the INBOARD motor
  • Option to configure the OUTBOARD motor
  • Option to regenerate the current under sails
  • Option assisted steering
  • Option steering with GPS
  • Option dynamic anchorage with GPS positioning
  • Option 4G via mobile phone and PC diagnosis and maintenance at distance
  • Option to choose colours and decorations (Custom)
FicheTechniquePropulseur head en
Patent pending
The electric motor Navigaflex with option INBOARD

The electric motor Navigaflex INBOARD has the advantage to retract the propeller into the hull and the function to pivot the propeller allows the replacement of the bow propeller. 
On a sailing boat the hydro generator option makes an extra accessory unnecessary. 
Compact and light, the Navigaflex version INBOARD can be discreetly integrated in the naval architecture of different boat types.


The electric motor Navigaflex with option OUTBOARD
The electric motor Navigaflex OUTBOARD is in principle attached to the boat transom. Thanks to the motorized functions of retracting and adjusting the propeller the user can stay safely in the cockpit and steer the boat with a joystick.

The significant advantages of the electric motor Navigaflex


  • A single dimension of the motor with the choice of motorization: 4 KW (8 HP), 6 KW (12 HP), 2 x 6 KW, 8 KW (16 HP), 2 x 8 KW, 10 KW (20 HP), 2 x 10 KW, 15 KW (30 HP), 2x 15 KW depending on the use and the size of the boat.
  • One reliable and tested concept with the options INBOARD or OUTBOARD, which is compatible with the vast majority of boats.
  • Integrated standard functions that make expensive accessories superfluous for instance an automatic pilot, bow propeller or a hydro generator.
  • A new technology that uses renewable energies.
  • A motor respecting the environment without neither noise pollution nor emissions of pollutants of exhaust gas and lubricating oils. In certain regions, it is possible to navigate in nature reserves or waters prohibited for thermal motors.
  • In comparison to a traditional inboard motor, the electrical boat motor Navigaflex distinguishes itself through a more compact, simple and robust integration. The inboard motor can be installed in a reduced space.
  • The implementation of the installation is considerably made easier through an electronic remote control connected to the motor (Plug and Play).

Thanks to all these advantages, the equipment of the boat is simplified and the costs are reduced.

Suitable boat types for the Navigaflex motor
  • Large units
  • Racing sailboats
  • Leisure boats
  • Fishing boats
  • Working boats and vehicles
  • Small and inflatable crafts
  • Nautical vehicles on foils
Recommended minimal power depending on boat length and weight

Length Weight Weight
> 8 metres > 2 tonnes 4 KW (8 HP)
> 10 metres > 5 tonnes 6 KW (12 HP)
> 12 metres > 8 tonnes 8 KW (16 HP)
> 14 metres > 10 tonnes 10 KW (20 HP)/15 KW (30 HP)
> 18 metres > 16 tonnes 2 x 10 KW (40 HP)/2 x 15 KW (60HP)
 Racing sailboats
Racing sailboats

The Navigaflex motor is especially appropriate for this boat type. Compact and light, the motor integrates discreetly in the naval architecture of the boat.

The possibility to retract the propeller makes the boat perform better.

Working boats and vehicles
Working boats and vehicles

Thanks to the large torque at low speed and the large diameter of its propeller the electric motor Navigaflex develops a strong pushing force and can carry out very delicate tasks.

The rotation of the propeller arm, especially in the configuration double motorization, allows an exceptional maneuverability. With a retracted arm the transport and beaching of the working boat is made easier.

Examples: Beach and port cleaning, small ferry, anti-pollution boat, fire brigade boat, public services, training sailing boat

Leisure boats
Leisure boats

Silent, easy to use, less maintenance and very clean, easier to maneuver in marinas as a result of the adjustability of the propeller.
The demand for more luxury and the use of a variety of electrical appliances asks for more and more energy. The storage of energy is the solution to this development. Sailing boats have the option of the hydro generator as the batteries are recharged under sail.

Fishing boats
Fishing boats

The amateur fisherman lagging behind, demands reduced speed and very few noise pollution. Within this perspective the electrical motor Navigaflex is optimal.

Nautical vehicles on foils
Nautical vehicles on foils

The technical and hydrodynamic details of the arm allow a development of fast and less energy consuming vehicles on foils.

The concept of the electric motor Navigaflex allows considering the development of special vehicles on foils. In the near future these fast, silent and non-polluting vehicles will be integrated in urban traffic of harbour and river cities. The Navigaflex department of research and development consults and helps with the conception and design of such boats. 

Small and inflatable crafts
Small and inflatable crafts

The retracted arm of the outboard version makes the docking uncomplicated.

Large units
Large units
The double installation of the motor (2 x 10 KW or 2 x 15 KW) in front and at the back of the boat, or at the back of both hulls (catamaran) allows an easy handling with the possibility to turn on the spot and perform lateral displacements. The security is assured in case of a breakdown of one of the two motors.


Navigaflex Sàrl
Route de Provence 16
CH - 1426 Concise