atmos PEM - Technology Efficient PEm-Stacks up to 330 kW General Information ATMOS is a high efficient Electrolysis Stack developed by Enphos.With its PEM based functional design it is possible to reach an efficiency of 55 kWh / kg.It is available in three diffent model series from 3.6 kW up to 330 kW. Applications Integration in Electrolyzer SystemsResearch and Development PurposesUniversities and Institutes Advantages Efficiency of 55 kWh / kgCompact Design and Low WeightElectrical Isolated EndplatesCentered Hydrogen OutputExcelent Handling Contact Us Today