London Tube’s Energy-saving Braking System

The world’s first regenerative¬†braking system has just been officially¬†set up in London’s underground Tube. The breakthrough as a world’s first came after a period of trialing, collecting and recycling waste energy over the brakes.

The inverter system is able to collect 1MWh electricity every day, enough to power the train station for up to 2.5 days, or save up to around 6 million Great Britain Pounds yearly. The technology collects waste heat during braking and feeds back into the battery as electricity.

The beauty of regen braking with trains is that you don’t necessarily have to store the power onboard, which means that you don’t have to carry the weight of a battery pack around.