The A485 stack consists of 230 cells assembled on a self-supporting rigid steel frame. As DC voltage is applied between the first and last electrodes, current flows through the cells, splitting water molecules to generate hydrogen and oxygen gas.
Each cell is composed of an anode and a cathode, separated by a woven non-asbestos diaphragm which is integrated in a synthetic rubber frame. The gas from each cell is collected in the hydrogen and oxygen flow ducts which feed the gas into the electrolyte system.
The electrolyte system consists of two gas separators, water seals, a lye circulation unit and a support frame. The main functions are to separate the gases (H2 and O2) from the lye coming from the cell stack and to cool and circulate the lye back to the stack. The electrolyte system is designed to serve a single atmospheric alkaline electrolyser cell stack. For large-scale plants the number of A485 stacks and electrolyte system modules are simply multiplied to obtain the required H2 production volume.