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Controllable Consumption Device According to §14a EnWG

Chargers are classified as controllable consumption devices according to §14a EnWG, as their connection power exceeds 4.2 kW.

WARP Chargers and WARP Energy Managers include a dedicated §14a EnWG module that centrally configures grid operator control. Depending on the selected signal source, when a control signal is received the calculated power limit is automatically applied to the configured consumers (wallboxes and/or heating).

Which signal source can be used depends on the requirements of the local grid operator and the device being used.

Signal sources​

Charger shutdown input (WARP Charger only)​

A potential-free contact (voltage-free switching contact) can be connected at the shutdown input inside the charger. For this, a control line from the ripple control receiver or the grid operator's control box must be routed into the charger and connected to the charge controller. For details on the connection at the terminal block, see Assembly and Installation.

In the §14a EnWG module, select Charger shutdown input as the signal source. The power limit is then automatically applied as soon as the grid operator switches the input.

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Energy Manager input (Energy Manager only)​

Instead of routing a control line into the charger, there is also the option to connect one of the four inputs of the WARP Energy Manager to the ripple control receiver or control box. The WARP Energy Manager then controls the power of the charger(s) via the network (LAN/WLAN). A separate control line to the charger is not required.

In the §14a EnWG module, select Energy Manager input as the signal source and configure the corresponding input (1-4).

EEBUS​

EEBUS is the designated interface for grid operator control of consumer devices. In the §14a EnWG module, select EEBUS as the signal source. The control signal is then received via the EEBUS interface.

API (HTTP/MQTT)​

The control signal can also be received via the HTTP or MQTT API. In the §14a EnWG module, select API as the signal source. Details can be found in the API documentation under p14a_enwg/control_update.

Other interfaces (OCPP, Modbus TCP)​

In general, the charging power of the charger can also be controlled via all other implemented interfaces. Grid operators currently use OCPP or Modbus TCP for control, if at all. These interfaces do not use the §14a EnWG module but control the charger directly.

Further information​