Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

ELY

Symbols

Hydrogen electrolyser

An electrolyser uses DC current to split water into hydrogen and oxygen. In microgrids and renewable hubs it acts as a large controllable load that can absorb surplus solar or wind generation, with the hydrogen stored for later use in a fuel cell or sold off site.

Drawing use: SLD
Application: Microgrid systems
Reference family: IEC / IEEE / ANSI

A distinction that matters

An electrolyser consumes electricity to make hydrogen; a fuel cell consumes hydrogen to make electricity.

Full reference

Symbols

Fuel cell

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.

Drawing use: SLD / Schematic
Application: Microgrid systems
Reference family: IEC / IEEE / ANSI

A distinction that matters

A fuel cell converts supplied fuel continuously; a battery stores a fixed charge and must be recharged.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.