This isn't really the right place to debate in detail, but please look again at what I wrote. I was talking about a class of larger vehicles that get used fairly heavily, ie the "work vehicles" which are frequently the topic in this thread. Bigger batteries and much higher utilisation than your case. Solar at home is of little use for vehicles which are out working most days. And the pre-subsidy costs of even your 5kW array are exactly what I'm talking about... massive investment at a national scale to get enough clean energy to charge them all. 
Delighted to agree with you on that 
 
FWIW I have 7kW PV at my place and buy 100% GreenPower for everything we import from the grid. I also have reserved an early spot in the Tesla Model 3 queue. It's not the current scale of the EV fleet in Australia that represents a grid-scale challenge, it's the idea of decarbonising the whole sector.
And hydrogen is a terrible option for chemical fuel. Super difficult to handle, and dangerous. There are some options like di-methyl ether or even ammonia which could be produced using nuclear process heat which would be better overall choices especially for extra-urban use.
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