>>6485976 (lb)
This is just electrolysis to separate hydrogen from water molecules. The amount of energy it takes to do this is significantly more than the amount of energy you can recover from a hydrogen powered generator.
So if you have tons of electric energy and you want to convert it into an explosive gas, well, this would work. Storing hydrogen safely is difficult and inefficient.
This is hype. This kind of hype shit has been around for more than 100 years. There is no free energy.
There are undoubtedly much better ways to convert and harness energy than (((they))) are allowing, but this is not one of them.