I think Hydrogen cars are really cool and might be much better environmentally than electric. Infrastructure is a problem. There aren't many places to gas up, but I am really into the tech.
Hydrogen cars are a complete waste power, as are gasoline powered cars. In both cases you could drive the same distance or more if you simply used the power it takes to generate the hydrogen or gasoline and wouldn't need the power in the hydrogen or gasoline at all.
the process of using electricity to extract hydrogen from water through electrolysis and then running the hydrogen through a fuel cell to generate electricity again loses over half of electricity you started with. So EVs are always going to be at least 2x as efficient as fuel cell cars.
2020 Toyota Miria fuel cell car gets 66 eMPG
2020 Tesla Model 3 gets gets 141eMPG
Toyota Miria rating ignores the energy lost producing the hydrogen, it's based on the energy potential of the hydrogen once it's generated.
It takes 55 kW of electricity to produce 1 KG of hydrogen (which has 40 kW of potential power) through electrolysis, put that resulting hydrogen in a Toyota Miria, run it through a fuel cell and use that to power the car and you get 62.4 miles of range.
Instead use that 55 kW of electricty to charge a Tesla Model 3 and you get 240 miles of range.
Alternatively, use the 15 kW of energy wasted generating the1 KG of hydrogen, and the Tesla model 3 has 62.5 miles of range.
Same thing happens if you compare an average vehicle to the tesla. It takes 8 kW of power to drill, transport an refine a gallon of gasoline. A Tesla model 3 can go 33.3 miles on that wasted power. The average new car gets 25.5 MPG.
After being refined, a gallon of gasoline has 36 KW of power. Add in the 8 it takes to produce it and it's 44 KW of power. Tesla model 3 can travel 183 miles on 44 KW of power.