ISRO has successfully tested a 100 W class Polymer Electrolyte Membrane Fuel Cell based Power System (FCPS) in its orbital platform POEM3.
It aims to assess Polymer Electrolyte Membrane Fuel cell operation in space and to collect data to facilitate the design of systems for future missions.
Polymer electrolyte membrane (PEM) fuel cells, also called proton exchange membrane fuel cells.
It uses a proton-conducting polymer membrane as the electrolyte.
Hydrogen is typically used as the fuel.
These cells operate at relatively low temperatures and can quickly vary their output to meet shifting power demands.