Sports prototypes with 400-volt technology can also deliver the maximum permitted recuperation power of 300 kilowatts as indicated in endurance regulations. However, their on-board network requires wire diameters that are twice as thick, resulting in an extra weight of about 30 kilograms. In the end, the overall efficiency counts. Less weight and less refueling stops meant that the lead for the winning 800-volt bolides grew ever wider. The motto of success on the racetrack was "Smart braking wins."