CPH2 has developed a hydrogen and oxygen production system as a clean alternative to complement battery-power for electric vehicles, off-grid, and grid-based electricity storage. Hydrogen storage systems also facilitate the decarbonisation of the gas grid as hydrogen may be substituted partially or fully in the place of methane. The CPH2 solution is a set of scalable processes, systems, and technologies that have been developed for efficient electrolysis, drying, purification, and separation of hydrogen from oxygen.