Serial Hybrid: Electric Motor with Generator Power & Energy Storage

This serial hybrid system uses a single electric motor per drivetrain and can both generate power and store energy. The system optimizes fuel consumption with a constant-speed generator engine. It’s best suited for vessels (e.g., military vessels, ocean-going vessels, ferries, and large yachts) operating in restricted areas and zero-emission zones.


High Voltage

Data / Command Signals

System Overview

  • Serial hybrid using electric power
  • Optimizes fuel consumption by replacing variable-speed propulsion engines with constant-speed generator engines
  • Machinery compartments can be located to optimize cargo space or meet class requirements

Reduction Gearbox

  • Allows for standard speed/smaller e-motor through motor speed reduction
  • Bi-directional input to utilize e-motor directional capabilities
  • Meets all applicable marine standards, including survey society approvals

Propulsion Controller

  • Twin Disc standard propulsion controller and operator interface

Hybrid Controller

  • Manages power distribution, interfacing with propulsion controller and high voltage equipment

E-Motor/Inverter, High Voltage Equipment

  • Selection based on application characteristics (torque, installation)
  • Controlled and monitored by hybrid controller

Energy Storage

  • Selection based on application characteristics
  • Controlled and monitored by hybrid controller

Profitable. Sustainable. Powerful.

These innovative hybrid and electric systems support greener power transmission while delivering the reliability you expect from Twin Disc. Explore some of Twin Disc’s hybrid and electrification options, then contact our team of experts to learn about the endless custom solutions available to create the optimal system. With more than a hundred years of experience in the design of innovative power transmission products, Twin Disc understands your needs and delivers the solutions that earn your confidence.


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Twin Disc specialists are available to work with your technical experts to select the optimal configuration and components for your specific application.

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