As PEM electrolyzer uses pure water as electrolytic solution, PEM-type H2 generator gives much less pollution, non-corrosive, and higher hydrogen purity.

Compared with the Alkaline-type H2 generator, it can operate at fast responsive speed (eg. ramping up and down in the range of 0-100%) with much higher current densities and electrolytic efficiency (up to 85%). Therefor, PEM electrolyzer can be built in light weight and take less land-use and operation regulation.