Electric Fin Stabilizer

Electric Fin Stabilizer


The Mega-Guard Electric Fin Stabilizer (EFS) provides comfort to the ship by active controlling a portside and starboard side mounted fin in order to reduce rolling of the vessel. Mega-Guard EFS is a full electric system and the fins are driven by a  permanent magnet motor with integrated gear. The fins are available for ships ranging 18 to 50 meter and vary in size in between 0,6m² to 2.5m². The Electric Fin Stabilizer works at every speed and it includes a zero speed mode and an anchor walk prevention mode. The EFS is operated through a user friendly 5.7” touchscreen for intuitive operation and monitoring. The EFS Operator Panel is available in two versions: with a metal front for commercial ships and with a highly esthetic glass front for mega yachts. Mega-Guard EFS is designed for quiet operation and low power consumption. The Electric Fin Stabilizer is powered from DC bus voltages in between 384VDC and 960VDC.



  • electric stabilizer with fins for any speed
  • zero speed and anchor walk prevention included
  • ultra quiet and low power consumption
  • for vessels in between 18 and 50 meter length
  • fin sizes from 0,6 to 2.5m²
  • small inside installation space

System lay-out and operation

The Mega-Guard EFS system consists of the following items:

  • 2x Fin Stabilizer; one for portside and one for starboard side
  • 2x High Power Inverter for driving and position control of the electric motor
  • HPI Operator Panel with a 5.7” touchscreen and built-in controller
  • Roll and pitch sensor connected to the HPI Operator Panel

The Fin Stabilizer consists of the following parts:

  • Electric Motor with gear
  • Hull Mounting Flange
  • Fin

The Hull Mounting Flange is welded into the hull and bottom side of flange is flush with bottom side of hull. The Electric Motor will be placed on the flange and fastened with 12 x M10 bolts. The fin is bolted to the Electric Motor from bottom side. Two versions are available; one for fin sizes up to 1m2 with a SAE2 flange and one for fin sizes up to 2.5m2 with SAE1 flange.


Electric Fin Stabilizer specification


Mounting & dimensions


System overview

Sales and service

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Contact information

Praxis Automation Technology
Zijldijk 24A,
2352 AB Leiderdorp
The Netherlands

+31 (0)71 5255 353

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