The Natural Philosopher wrote:

What, liquid hydrogen? How many litres is that for 500 miles?

It's around 8kg of hydrogen.

122 litres of cryogenically frozen liquid hydrogen

But that is of course ********. You need way more hydrogen than 8kg.

8kg of hydrogen is about 1000 MJ.

That's about 29 litres of diesel. Something like 8 gallons

If you think you can do 500 miles on 29 litres of diesel good luck with
that.


Suggest you look at the official figures for the Honda Clarity and
Toyota equivalent.

The big stumbling block for Hydrogen is the power to crack it from
water. But when you look at the requirements to charge 30 Teslas to do
500 miles, it doesn't look so bad!

There's probably a balance here - plug-in fuel-cell / battery hybrids
would work in 99% of situations.
--
Steve H