You can store energy created by renewables this way easily and use it when needed. Right now we can't produce enough hydrogen though, so gas can be used in the meantime, but in the future the entire infrastructure, such as power plants, pipelines or port terminals can be switched to hydrogen: https://www.bundesnetzagentur.de/EN/Areas/Energy/HydrogenCor... You could even produce the hydrogen needed cheaply in countries with better conditions for solar and then ship it the same way we currently do with gas. Hydrogen power plants also have the advantage to quickly change output volumes, which is needed when most energy is produced by solar/wind.
Ideally German's investment into nuclear fusion pays off though as it would change the whole game. https://www.dw.com/en/nuclear-fusion-germany-bets-billions-o...
Nuclear fusion would absolutely be a game changer. But they it could take 5, 10 or even 50 more years to achieve that and by that time I don't know if German economy would be able to keep on pumping billions into research.
I think it can work, especially as you can easily import it using existing gas infrastructure and pipelines as a lot of that infrastructure is build to be converted in the future or currently upgraded for it.
> Nuclear fusion would absolutely be a game changer. But they it could take 5, 10 or even 50 more years to achieve that and by that time I don't know if German economy would be able to keep on pumping billions into research.
Building a nuclear reactor would probably might as well take just as long and we need quicker changes — especially when it comes down shutting down our coal power plants.
I believe that the money a nuclear reactor would cost to build is better invested in renewables (together with gas/hydrogen) and nuclear fusion. Is this strategy the right move? Only time will tell, but I'm optimistic.
To transport hydrogen, you need complex infrastructure (real cold trunk or whatever) and you still leak, so the overall efficiency is bad