It is not hard to see why heavy vehicles have been chosen for Australia’s push toward hydrogen mobility.
"Making a vehicle thus equipped 70% lighter than a battery powered variant (considering a 44-ton GVW truck) and six times faster filling time than a battery vehicle - the fuel cell has a refilling time of around 20 minutes, while the battery can take up to two hours," said an FPT statement.”
https://www.just-auto.com/news/fpt-develops-hydrogen-fuel-cell-powertrain-for-heavy-duty-applications_id185836.aspx