Here is a fun article from The Green Wombat retelling the "solar-to-hydrogen" car story for the millionth time. I read stories like this in Popular Mechanics decades ago. The article talks about using solar panels to store sunlight as hydrogen to burn in internal-combustion-powered cars. Australia has a lot of sunlight and summers can be hot. It would be far more efficient to use that sunlight to power swamp coolers to air-condition homes than to throw 90% of that solar energy away converting it to hydrogen and then burning it in a 30% efficient internal combustion engine. Passing hydrogen through a fuel cell to power an electric car or light a home would also be a lot more efficient.
