In a regular internal combustion engine vehicle, the car is slowed via conventional friction brakes which press the brake pads against the discs. The kinetic energy from the vehicle is converted into heat energy, which is essentially wasted. However in a battery electric vehicle (BEV), the electric motor can convert that kinetic energy into electricity to top up the battery, increasing the number of miles you can drive on a single charge.
In Formula E, the length of the race is the same for each competitor, and the amount of energy allowed to complete the race is also fixed, at 56 kilowatt hours, so the benefit of regenerative braking in racing translates into extra performance and potentially faster lap times. The intensity of electric racing really tests the vehicle’s parts to the limit – as well as their engineers – and with Jaguar involved in developing both electric race cars and electric road cars, there will be mutual benefits.