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Oh dear, someone got distracted, hope he wasn't on his phone at the time 🙂

Not sure about the water storage capacity but I do know that when we returned from a drive of about 10 miles it released a considerable amount of water when the button was pressed. However, not sure how far it had been driven beforehand so cannot really say how much is produced over a time/distance and how if differs with demands such as speed or temperature, etc. It is essentially the same as driving an electric car and where it differs is that the energy is provided by a hydrogen fuel cell that delivers current directly to the batteries (which are much smaller in size, weight and capacity than a normal electric car as there is no need to run on stored energy as it is constantly being produced from the fuel cell on demand). All round, it is a superb car (albeit costly to purchase) and has huge interior space and comfort (but not RX level), and have to say I think it is definitely the way forward. The only downside is the lack of available refilling points in the UK (around 12 in total when the car was tested) and mostly around airports for some reason. When there is more investment in the infrastructure then it will become a more viable and attractive option. As a footnote, there is a post in this forum from a few years ago about hydrogen shortage in the US due to cold temperatures, storage and transportation issues, etc.....worth a read I reckon.

That could be one of the reasons they have postponed to 2026. The more power you want an engine to deliver the more fuel it will need and for hydrogen that will mean more water. Toyota is refining both combustion and fuel cell and only the combustion is sounding like a race car. Do not think the Mirai is pouring out much water when driving https://www.toyota.com/mirai/ but only people living in California have filling stations so it would be worth driving one. No filling stations no hydrogen cars. Still think that even stupid politicians sooner or later will find out why all the electric cars they are pressing people to buy are not helping getting pollution down when the cars are charged with electricity from more than 50% not green power and the power used to make the batteries is many places coming from coal. Sure the electric cars do pollute so much where they drive, but making them just moved the pollution to another place and pollution need no visa to move. Here we had 48 degrees Celsius for a first time on the south side of the island; yes weather is getting more extreme everywhere.

2006 is not that long ago. Here is something that is in the future for the most challenging 24 hour race: https://au.motorsport.com/lemans/news/how-le-mans-is-using-grape-residues-and-hydrogen-to-drive-a-sustainable-future/10479840/ Toyota has a car that could have been ready this year, but rules have changed and hydrogen may not be used in the long race before 2026 -27, but still will be evolved by TotalEnergies and probably will be racing this year in shorter races. It is really well explained why batteries is not future for delivering power to cars. I still hope to last long enough to get a hydrogen car. https://www.designboom.com/technology/toyota-gr-super-sport-concept-15-01-2018/