{"schemaVersion":1,"slug":"fuel-cell","name":"Fuel cell","kind":"symbol","abbreviation":"FC","aliases":["fuel cell stack","hydrogen fuel cell","PEM fuel cell"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An electrochemical source that converts hydrogen or another fuel directly into DC electricity, usually followed by a converter.","description":["A fuel cell produces DC electricity from an electrochemical reaction between a fuel, usually hydrogen, and oxygen from air. Unlike a battery it does not store its reactants; it runs as long as fuel is supplied. Stack voltage falls noticeably with load current, so a DC/DC converter or inverter almost always follows it.","Drawings show the cell or stack as a rectangle with plates, or as a cell symbol labelled FC, with positive and negative DC leads. Balance-of-plant items such as the air blower, humidifier and coolant pump are auxiliary loads and normally appear on a separate auxiliary supply drawing.","The symbol does not state whether the stack can follow fast load changes. Most fuel cell systems pair with a battery or supercapacitor to cover transients, and the fuel supply, purge and safety interlocks belong on the process drawings."],"readingNotes":["Expect a converter and often a battery buffer next to the stack.","Separate stack output from auxiliary consumption when reading ratings."],"drawingChecklist":["State stack voltage range and current.","Show converter and buffer storage.","Reference fuel supply and safety interlocks."],"distinction":"A fuel cell converts supplied fuel continuously; a battery stores a fixed charge and must be recharged.","facts":[{"label":"Output","value":"DC, voltage falls with load"},{"label":"Fuel","value":"Usually hydrogen"},{"label":"Typical pairing","value":"DC/DC converter and buffer storage"},{"label":"Preview","value":"Independent educational illustration; consult the applicable standard and project legend for the exact graphic"}],"references":[{"sourceId":"iec-diagrams","relevance":"IEC graphical symbol context for sources and conversion elements."},{"sourceId":"energy-storage","relevance":"Public energy storage and power conversion context."}],"related":["hydrogen-electrolyser","dc-to-dc-converter","battery","supercapacitor-bank"],"artwork":"s28-fuel-cell","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Fuel cell mean?","introduction":"A fuel cell produces DC electricity from an electrochemical reaction between a fuel, usually hydrogen, and oxygen from air. Unlike a battery it does not store its reactants; it runs as long as fuel is supplied. Stack voltage falls noticeably with load current, so a DC/DC converter or inverter almost always follows it.","example":"Drawings show the cell or stack as a rectangle with plates, or as a cell symbol labelled FC, with positive and negative DC leads. Balance-of-plant items such as the air blower, humidifier and coolant pump are auxiliary loads and normally appear on a separate auxiliary supply drawing.","drawings":"The symbol does not state whether the stack can follow fast load changes. Most fuel cell systems pair with a battery or supercapacitor to cover transients, and the fuel supply, purge and safety interlocks belong on the process drawings.","terms":[{"name":"DC","meaning":"Direct current: electricity flowing in one direction."},{"name":"Rating","meaning":"A value stating the conditions for which equipment is specified."},{"name":"Schematic","meaning":"A drawing showing function and connections rather than physical appearance."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"IEC graphical symbols for diagrams","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/"},{"label":"Battery energy storage and power conversion","url":"https://www.eaton.com/sg/en-us/products/energy-storage.html"}],"detail":"An electrochemical source that converts hydrogen or another fuel directly into DC electricity, usually followed by a converter. A fuel cell converts supplied fuel continuously; a battery stores a fixed charge and must be recharged.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/fuel-cell","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/fuel-cell.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-diagrams","title":"IEC graphical symbols for diagrams","publisher":"IEC","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/","type":"standard","scope":"IEC 60617 and related symbol-design publications. Full database access requires a subscription.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"IEC graphical symbol context for sources and conversion elements."},{"id":"energy-storage","title":"Battery energy storage and power conversion","publisher":"Eaton","url":"https://www.eaton.com/sg/en-us/products/energy-storage.html","type":"manufacturer","scope":"Explains battery storage and the power-conversion interface. Product-specific installation requirements remain with the manufacturer.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public energy storage and power conversion context."}]}