On 29/09/2017 23:30, Steve H wrote:
Hydrogen seems sensible - you can make it on site (yes, you need a big
electric cable - but so does a forecourt of charging stations) - you can
fill a lightweight kevlar / carbon tank in minutes and get 500 miles of
driving with only water / steam as the tailpipe emmissions.

It is only possible to store enough onsite for a couple of fills, and
then takes several hours to make the next lot.

So how many filling stations will be needed?