These numbers suggest that water supply will not be the limitation for electrolyzers, and we should instead continue to focus on technological improvements for the energy efficiency of electrolyzers, which is currently the limiting factor and has the potential for significant advancements. While the concern about the “water problem” is much more prevalent in the journalistic community than among scientists, journalism can have a significant influence on the acceptance of hydrogen as a growing market. It is therefore essential that we rigorously characterize the true water requirement of electrolysis technology, without the influence of water needs for the current non-renewable infrastructure, to get a clear idea of the impact hydrogen can have on a renewable energy future.
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