Some people legitimately think we can just suck hydrogen out of the air or ground and store it in tanks. (We can, to a limited degree, there's a fancy color attached to that kind of hydrogen).
Then when you attempt to explain that no, that's not how it works, we need to always separate the hydrogen molecules from another substance, which takes energy. A significant amount of energy. So much energy that it's better to shove the same amount of kWh to a battery instead.
The only vaguely useful thing for Green Hydrogen would be renewable overflow storage. When your solar/wind farm is producing too much energy for the grid, you shove it to an electrolysis station that converts water to hydrogen and pressurises it.
Then you pump that into a gigantic fuel cell when the sun is down or it's not windy anymore.
Then when you attempt to explain that no, that's not how it works, we need to always separate the hydrogen molecules from another substance, which takes energy. A significant amount of energy. So much energy that it's better to shove the same amount of kWh to a battery instead.
The only vaguely useful thing for Green Hydrogen would be renewable overflow storage. When your solar/wind farm is producing too much energy for the grid, you shove it to an electrolysis station that converts water to hydrogen and pressurises it.
Then you pump that into a gigantic fuel cell when the sun is down or it's not windy anymore.