Splitting the sea

Hydrogen, in this case, is not an energy "source". It is a storage medium. You don't get it without putting energy into it. I want to know how many units of energy you get out of it for every unit you put in. You'll need a good infrastructure to move it around if you want to produce it centrally and get it into peoples homes or cars.

However, that doesn't make this an insignificant discovery. Depending on the amount of energy needed, you could use this as a storage medium for solar powered homes instead of a battery. Solar power would provide the home with power and create hydrogen for consumption at night.