Hydrogen especially has this problem because the produces a LOT more waste heat than a pure battery-electric powertrain. One person familiar with the matter onc

Hydrogen especially has this problem because the produces a LOT more waste heat than a pure battery-electric powertrain. One person familiar with the matter once told me the cooling system (fan, coolant pump, etc) on the heat exchanger of a fuel cell hydrogen semi truck prototype used about as much power as a Nissan Leaf.