[Bring_Back_Shantz]

Originally Posted by zamler

Once the engine is warm volume is minimal. H car literally pisses water, maybe not enough to matter maybe it is not sure. Also won't it freeze in the bladder?

Bleh I hate FCEVs so much they slow, heavy, inefficient and no infrastructure. Building out a hydrogen fueling network would be insanely expensive. And oil companies love it they are the ones with the H stations.

I'm going to assume you're saying that once the engine warms up, any water produced is vapour and therefore doesn't end up on the road?
I would think that a fair bit of it would, as any water coming out of that tail pipe is likely to condense/freeze when it's cold enough to actually matter.
I'm not sure if the byproduct from a fuel cell is liquid water or vapour, but even if it is liquid and 100% ends up on the road it looks like the volume/km driven is the same as a gas engine:

https://www.energy.gov/eere/fuelcell...-cell-vehicles

Doesn't seem like much, but I suppose it could add up, but I would also assume that in the winter a good portion of what comes out of out tailpipes is also landing on the roads after it condenses/freezes.

Would be interesting to find out, but in the worst case scenario, it's not gonna be an insurmountable problem for hydrogen cars.