Electrical does use the DataGroup System. Which AECOsim files get overwritten? Electrical DataGroup information would be written in xml files.
Electrical has xml files that are in the DataGroupCatalog folder (Electrical.xml) as well as many xsd definition files.
DG_PATH defines the Location of DataGroup System catalog types and DatGroup definition.DG_CATALOGS_PATH defines the Location of custom catalog types, catalog type extension files, catalog items, and custom catalog items.These are the DataGroup variables that include the xml's and xsd files for electrical. If the electrical xml and xsd files are in these folder paths then all the Electrical symbols used will be picked up in the DataGroup System. All electrical variables specifically begin with BBES_ and none reference DataGroup files.
The only affect these electrical properties would have in BBES is that you would be able to export a schedule to Excel through the DataGroup System tools.