Range extender

The range extender system (sometimes called EREV or REEV) is a system that uses a small gasoline engine.

Range extender

The range extender system (sometimes called EREV or REEV) is a system that uses a small gasoline engine.

System

The engine of a range extender car

The range extender uses a combustion engine as a generator to recharge an electric motor when it runs out of power[1]. Unlike a gasoline engine, it has no connection to the wheels, nor is the drivetrain purely electric[2]. The system is divided as follows:

Procedure

Logo REEV
  • Pure Electric Drive: The car draws energy directly from the battery recharged at the charging station. Driving is silent, smooth, and produces zero local emissions.
  • Critical Threshold: When the battery harge drops below a certain percentage (for example 20-25%), the control unit automatically starts the internal combustion engine.
  • Power Generation: The gasoline engine runs at a constant, optimized rpm. It drives an alternator/generator that produces electricity.
  • Continuous Power Supply: The generated current is sent to the battery to maintain a stable charge or transmitted directly to the electric motor to move the vehicle.

Let's take an example: Hyundai will put the first range extender cars on the market in 2027, the models that will be made are the Hyundai Santa Fe and the Genesis GV70[3].

Story

The history of the range extender began in 1901, when Ferdinand Porsche created a Porsche. In the modern era, we can mention the Chevrolet Volt and the BMW i3.

[4]

  1. ↑ Redazione (2024-10-03). "Le auto elettriche a benzina, cosa sono le Range Extender?". L'Automobile (in Italian). Retrieved 2026-07-10.
  2. ↑ Redazione (2024-10-03). "Le auto elettriche a benzina, cosa sono le Range Extender?". L'Automobile (in Italian). Retrieved 2026-07-10.
  3. ↑ Redazione (2024-10-03). "Le auto elettriche a benzina, cosa sono le Range Extender?". L'Automobile (in Italian). Retrieved 2026-07-10.
  4. ↑ Redazione (2024-10-03). "Le auto elettriche a benzina, cosa sono le Range Extender?". L'Automobile (in Italian). Retrieved 2026-07-10.

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