According to VDE0100-722:2016, each connection point must be protected by its own residual current protective device of at least type A with a rated differential current no greater than 30 mA. Charging stations with sockets or vehicle couplings must also have protection against DC residual currents.

In a master-slave configuration, several charging points are connected in series. One charging station acts as the master. The communication controller (Single Board Computer short SBC) for controlling all charging points is integrated in the master charging station. In addition, the connection to the backend runs via the master. Within the system, load management can be operated with a specified maximum current so that exceeding the maximum current is prevented. Optionally, the consumption of an entire building can be measured and the charging infrastructure adapted.

Every hardware manufacturer can offer different backend operators that are compatible with its charging stations. ABL offers the possibility to integrate almost any backend.

There are various communication options for establishing communication with the backend. On one hand, communication can take place with the aid of LTE via a SIM card. On the other hand, it is possible to communicate with the backend via the integration of an existing LAN. Currently, ABL also offers communication via wireless LAN.

An internal temperature monitor is integrated to protect the charging station from overheating. For this purpose, the charging current is automatically limited to a safe level. Electronic overcurrent protection also protects the charging cable from overloading.