it shows that letting the ''free market'' trade essential things is an great idea, and why converting solar power into liquid hydrogen which can be used to heat houses, as a power source or as car fuel isn't an bad idea.
That wouldn't be my conclusion. Those subject matters don't really come up. In any case, your latter idea doesn't work due to the following:
1. Solar generation is generally at a useful time of day when there is demand, so it is most likely going to be sold to the grid
2. No one is going to spend all the capital on an electrolyser to only use it 10% of the time as would be the case with solar
3. People tend to heat their homes in the winter whereas solar is at its peak in the summer, so you would require a vast amount of storage which isn't that straightforward. It also can't be used purely for heating and has to be mixed into gas.
4. Even if you ditch the heating idea, the people that drive the tiny number of hydrogen power cars will require year round fuel, so you still need lots of storage.
5. To make liquid hydrogen, the temperature needs to be incredibly low, so it's not really viable. Instead it needs to be turned into ammonia.
6. It's not a very efficient way of storing energy if the plan is to convert it back to electricity.
I suspect I have just been trolled, but the current thinking with hydrogen is to use it in very power intensive industries and make the hydrogen very close to the point of use. If anyone finds a cost effective way to transport it, then the sunny places in the world will all enter the game.
