Range-extending Generator

A YASA electric motor coupled with a petrol or diesel engine creates a powerful range-extending (REx) solution. YASA motors also extend the range of a hybrid electric vehicle by providing reserve energy with minimum impact on the drivetrain layout and vehicle weight.

YASA motors and controllers – with their very small package and high power to weight ratio – are an ideal generator for the lightweight and efficient small engines used for range extension. Up to 100kW continuous generation can be delivered with a P400 series axial-flux motor.

Design Features


  • 12kW/kg continuous 
  • Up to 100kW continuous generation 
  • Axial length of 110mm
  • Weight including covers and sensors of 27kg