A quarry in Biel, Switzerland, is operating the world’s largest electric vehicle: a 110-ton dump truck, to haul lime and marl off the side of a mountain to a cement factory. And in a round trip up and down the mountain it generates more electricity than it consumes.
The dump truck, at 45 tons, is designed for a tough job. It ascends the 13-percent grade and takes on 65 tons of ore. With more than double the weight going back down the hill, the truck’s regenerative braking system recaptures more than enough energy to refill the charge the eDumper used going up.
The Elektro Dumper—eDumper for short—is made by Kuhn Schweitz and is 30 feet long, 14 feet wide, and 14 feet tall. The tyres are six feet high, and the dump bed reaches to more than 28 feet, fully raised.
Kuhn Schweitz adds a 600 kilowatt-hour battery pack—big enough for six, long-range Tesla Model Ses—from Lithium Storage that weighs 9,000 pounds.
Marking that trip around 20 times a day, Kuhn Schweitz says the eDumper produces 200 kwh of surplus energy every day, or 77 megawatt-hours a year. A typical dump truck uses between 11,000 and 22,000 gallons of diesel fuel a year. That saves up to 196 metric tons of global-warming carbon-dioxide gas a year.