I would love to see what the cost of a tank of hydrogen would...

I would love to see what the cost of a tank of hydrogen would cost, the article didn't seem to mention that. Likewise I'd like to see the energy balance of the hydrogen powered fuel cells compared to a lithium ion battery, both charged from solar. We will set aside the energy cost of fuel cells themselves to the lithium battery, though the life of the fuel stacks would be interesting to know.

Ceramic fuel cells had a good efficiency to start with but it did fall away with time as the cells degraded.
They were built for a constant output, I'm not sure what a changing electrical output would do for the life of the stacks in the fuel cells, and they are the heart and most expensive part.
Is there any info on the fuel stacks life or replacement cost? or the cost of hydrogen?
Anyone please?

Happy Cats, you keep concentrating just about EVs and nothing else. IMO it is a lot more that is being, and needs to be transferred to run on batteries. If you look on the roads, there are an enormous number of trucks and vans delivering goods all over the place, farms need tractors, and there are buses, boats, trains home and grid storage as well, so we are realistically talking multiples of just EV use.

The calculation for 250m Ev with an average of 70Kw/EV and .7kg/Kwh is as follows. 250,000,000 X 70 X 0.7/ 1000 (kg-tonnes) = 12,250,000 tonnes of LCE
PLS has a current resource of 3.98m tonnes LCE, but at a 77% recovery for our resource only really 3.06Mt LCE.
So our resource is enough for 25% of 250m EVs or 6.25% of all EVs on the road (around 1b in an all EV world), but as EVs would only be about 1/4 of ALL use, we would only be 1.5% of total world use.

That basically means a LOT of lithium apart from our resource needs to be found and mined in the next 20 years.