Parallel Hybrid: Diesel + Single Electric Motor with Energy Storage

This parallel hybrid system delivers the optimal balance between electric and hydraulic power requirements.

High Voltage

Data / Command Signals

System Overview

  • Parallel hybrid using diesel and electric power
  • In high-demand phases, electric power can boost diesel power
  • During low-power operation, the e-motor can use excess diesel power to generate electricity
  • Power regeneration through braking (inertia or vehicle) or lowering loads is possible but requires a clutch between diesel engine and RePTO drive

RePTO drive

  • Installed between diesel engine and e-motor/generator
  • Single and dual tower options available for driving hydraulics or other auxiliary loads
  • Mechanical interface to direct-mount e-motor/generator to RePTO drive output
  • Clutch between diesel and RePTO drive for electric-only mode and for power regeneration
  • Permits power generation through PTO/PTI in various operating states
  • Prevents engine back-driving during electric-only operation

Hybrid Controller

  • Manages power distribution, interfacing with customer’s vehicle/machine controller and high voltage equipment


  • Selection based on application characteristics (torque, installation)

Inverter, High Voltage Equipment

  • Controlled and monitored by hybrid controller

Energy Storage & BMS

  • Selection based on application characteristics

Diesel Engine

  • Not supplied by Twin Disc

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.

Land-Based / Off-Highway / Mobile Equipment

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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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