Under the skin: Why regenerative braking works so well | Autocar

Regenerative braking is a hugely efficient way of recuperating lost energy, but what makes it so effective? Jesse Crosse explains

It goes like this: reducing weight reduces the amount of fuel consumed and therefore the amount of pollutants emitted. Less fuel then has to be carried, saving more weight and therefore saving more fuel. The brakes can then be smaller, because the kinetic energy in the car is reduced, and smaller brakes weigh less. And so it goes on.

A well-executed regen system recovers significant amounts of energy when the vehicle is slowing, and in some EVs the amount is displayed in real time in the instrument display. It’s kinetic energy that the driver has paid for in real money and in a plain combustion-engined car would be discarded and lost forever.

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