Hydrogen storage technologies are technologies that relate to the production and use of hydrogen.
Hydrogen technologies are applicable for many uses including the storage of excess electrical energy.
Some hydrogen technologies are carbon neutral and could have a role in preventing climate change and a possible future hydrogen economy.
Hydrogen is not in and of itself an energy source, because it is not naturally occurring as a fuel. It is, however widely regarded as an ideal energy storage medium, due to the ease with which electric power can convert water into its hydrogen and oxygen components through electrolysis.
The potential environmental impact depends primarily on the methods used to generate the hydrogen fuel.