I came across an informative interview about hydrogen energy. The most interesting thing about it is the calculations, according to which it turns out that: "out of every 100 units of clean electricity you invest, only 20-25 return".
The efficiency of green hydrogen solutions is generally considered to be 70%. That is, you spend electricity from renewable sources to produce H2 from water, and in the end you get 70% of what you spent (in energy value).
This ratio is used in very serious documents. For example, in the German hydrogen strategy.
And here the interviewee suggests considering the entire chain of hydrogen consumption. And it turns out that the real efficiency is 20-25%.
Can these calculations be undermined? Maybe. But for this it is best to conduct the appropriate study, and then rely on its results when the next necessary hydrogen strategy is processed.