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by planede 1243 days ago
What about the cost of the supporting infrastructure for cramming that 1GW into hydrogen and back to electricity? Well, with fuel-cell cars you don't need centralized infrastructure for converting back, but then you need infrastructure to distribute it inland. You still need the supporting infrastructure on Australia's side for the electrolysis.

Of course the power cable would also need supporting infra, other than the length of the cable, but I have a hunch that it would cost way less. I have no numbers though.