Why is the cost of producing hydrogen by electrolysis of water high in industry?

Because the electricity consumption of electrolysis will be very large and the cost will be very high ~

Because hydrogen combustion will release a lot of energy and produce water.

On the contrary, if you want to ionize hydrogen in water, you need to absorb more energy than the energy released by combustion.

Therefore, electrolysis of hydrogen will require a lot of energy, especially electric energy, so it will consume a lot of electric energy and the cost is high.

It seems that there is no specific data, and no one has measured it ~ ~