The argument I hear for H2 in cars in reference to Australia is long distance travel. ie driving to Bourke. Where are the fast chargers?H2 will never be widely used in cars or light commerical because EV's are inhertiantly simpler and cheaper. The exception maybe vehciles constantly 24h use.Yes, for heavy vehicles H2 is the way to go. As for efficiency:
As for full life cycle energy efficency, I would like to see that compared against petrol or gas.
Fuel cells are about 65%
Electrolysis is 80%
Hence around 50%, but that doesn't take into account fuel transport and so forth.
Cost is the other big issue for H2. Scaling up and further efficiency gains should see that end up being closer to current diesel costs within a decade or so.
The argument I have for H2 in cars is that for accessing places like Bourke, you need to replicate the entire petrol/diesel distribution chain. When will a fuel station in Bourke have a H2 bowser?
Meanwhile Mrs Average living and working in Bourke can charge her EV at home. As for long distance driving, yes Fast Chargers will be needed and majorty roll out will take another 5 - 10 years before its comes close to replicating the fuel industry, but are also relatively cheap to install and can be done at any locaton where there is access to sufficent electrical supply with far less regulation and costs than fuel stations. Opens the doors for other businesses to attract customers. For remote areas this may mean diesel generators, but who cares, its an exception, not a rule.
As for 4x4, off the beaten track stuff (something I do), EV's are many years away on this one, but again as exception, not a rule, who cares. No one ever said the world should be rid of ALL ICE vehicles or even coal power stations, just reduce most of the Head Count when and where practical to do so.