it useless the principal work same as gasoline u need the gas that go explode with spark even if it better than gas at no CO2 release u still need electric to electrolytes the water to release the hydrogen.solar might help but it use alot of electricity need for electrolytes the water and also to keep the system for machine work . let say
a gasoline car use 1:1 electricity to run the fuel inject and systen and gas used to run car
an ev car it pure electricity
for water fuel car it use 1:2 electricity
yea the car not gonna go fast that just a bs😭 also it just a temporary solution when u run out of gas but still a hybrid car work better than this