A few key facts about the pros and cons of fuel cell versus battery courtesy of David Booth.
“A modern car battery can store 250 watt-hours of energy for every kilogram of lithium-ion. A kilogram of hydrogen, meanwhile, has 33,200 of those watt-hours per kilo. No, that’s not a mistake. Yes, hydrogen is more than 100 times as energy-dense as a li-ion battery.”
“Battery-powered electric vehicles are phenomenally efficient. Depending on the model, they can boast a well-to-wheel efficiency of around 70 to 80 per cent. By comparison, a hydrogen fuel cell-powered electric vehicle (FCEV) is positively parsimonious, with an overall efficiency of somewhere around 30 to 35 per cent… The fact remains that converting electricity to hydrogen only to then convert it back is never going to be as efficient as directly feeding a battery.”