London’s first hydrogen-powered ambulance is set to take to the road later this year, carrying an NPROXX hydrogen storage tank system that is capable of storing up to 8kg of compressed gas at a nominal pressure of 350 bar. Named ZERRO (short for Zero Emission Rapid Response Operations), the prototype ambulance will be powered by a combination of a 30kW fuel cell, with NPROXX’s type IV pressure vessel and a 400V 92kWh battery. The fuel cell will act as a range-extender to charge the battery when needed. This will give the ZERRO an expected average daily range of 200 miles (320 kilometres) and a top speed of 90mph (145kph).
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