[Animats]

Something is wrong with his numbers.

"Johnson boasts that his electrolyzer can produce hydrogen at about three or four times the rate of electrolyzers with similar footprints, using about a third the electrical current. That represents a stepwise drop in costs."

Three or four times? Current efficiencies are 65-70% for larger plants.[1] There's a theoretical maximum here; it takes a known amount of energy to break down water into oxygen and hydrogen. This isn't magic or perpetual motion. Electrolysis is energetically uphill. You can get most of the energy back recombining oxygen and hydrogen in a fuel cell or by combustion.

The "with similar footprints" is very suspicious. His demo unit is small. Little electrolyzers are known to be inefficient. Industrial units are bigger and more efficient.

As an emissions control measure, it might work out.

[1] https://en.wikipedia.org/wiki/Electrolysis_of_water#Industri...

[Obi_Juan_Kenobi]

Considering the smaller footprints are less efficient, then perhaps that makes room for a 3-4 fold improvement. Whether that's true is another issue, but at least it appears somewhat consistent.