Opel HydroGen4

The Opel HydroGen4, also sold as the GM HydroGen4, the Vauxhall HydroGen4 in Britain and the Chevrolet Equinox Fuel Cell in the United States, is a fuel cell vehicle that was presented at the Frankfurt Motor Show in 2007. General Motors and its subsidiary Opel developed it on the basis of the Chevrolet Equinox as the successor of the HydroGen3, which had been built on the Opel Zafira A and used in demonstration projects around the world. Its drive unit descends from the Chevrolet Sequel concept of 2006 and combines a polymer electrolyte fuel cell stack of 440 cells and 93 kW with a nickel-metal hydride battery of 1.8 kWh and a synchronous electric motor of 73 kW continuous output that drives the front wheels through a planetary gear. The car reaches 160 km/h and accelerates from 0 to 100 km/h in 12 seconds, and three carbon fibre tanks hold 4.2 kg of hydrogen at 700 bar for a range of about 320 km. In 2007 and 2008 170 vehicles were built, of which 119 went to customers in the United States, Germany, Korea and Japan, including the Clean Energy Partnership fleet in Berlin, and by May 2014 these 119 cars had covered more than three million miles.