Why can’t I add a particular charger to a group?

Why can’t I add a particular charger to a group?

If a charger doesn’t appear in the Assigned Chargers list when creating or editing a group, it usually means:
  1. That charger is already part of another group.
  2. Each charger can belong to only one group at a time, so it is hidden from the available list.
To add that charger, you’ll first need to remove it from its current group.