In Gridware, a charging cluster is a group of charging stations that are being fed by a shared input lead and are being controlled by an energy-management.
All this is being done via “smart charging”, which is sufficiently standardized. So the charging stations may very well differ in regards to hardware-configuration and brand.
A charging cluster is necessary whenever there is constant maximum current, usually defined by the specifications of the input lead. For each individual charging cluster we can assign a different algorithm to distribute the energy, a different balancing-interval and a different balancing-significance.
For those cases where the maximum current is not constant but dynamic, we use the concept of a Charging Farm instead of a Charging Cluster.