EXAMPLE An installation that absorbs AC electrical energy to produce hydrogen by electrolysis, stores the hydrogen, and uses that gas to produce AC electrical energy.

Note 1 to entry: The term “electrical energy storage” can be also used to indicate the activity that an installation, described in the definition, carries out when performing its functions.

Note 2 to entry: The term “electrical energy storage” should not be used to designate a grid-connected installation, for which "electrical energy storage system" is the appropriate term.

Note 3 to entry: Energy conversion processes can be included during energy absorption, storage or release.

Note 4 to entry: This note applies to the French language only.