Information on Multi-EVC operation with System Manager

Several SMA eChargers can be operated on a System Manager. The maximum supported number depends on the System Manager used and its firmware version. Up to 49 SMA eChargers and 1 SMA Energy Meter are supported with a Data Manager. With other System Managers, the maximum supported number may be lower.

In Multi-EVC operation, the System Manager provides the information required for energy management to the connected charging stations.

The charging power specified by the energy management is transmitted by the System Manager to the active charging stations. The System Manager makes an adjustment only when a configured system limit is reached. This might be the case, for example, if the configured system power would be exceeded or if a current limit configured for the overload protection is reached.

If the configured PV power (parameter.Inverter.WMaxIn) is exceeded (for example limited by curtailment), the System Manager reduces the charging power of the active charging stations according to the prioritization defined by the energy management.

If a configured current limit (Parameter.PlntCtl.OvLodProt.ARtg) for overload protection is reached, the System Manager reduces the charging power of all active charging stations.

The charging modes Fast charging, Solar and Smart (only with activated Energy Maximizer) are supported in Multi-EVC operation.

In the Solar charging mode, the available surplus power is distributed to the active charging stations. The distribution is based on the configured charging power of each charging station. If the available surplus power is insufficient, the charging stations are prioritized alternately to distribute the number of charging interruptions as evenly as possible.

In the Smart charging mode (target level), the Energy Maximizer takes over the prioritization of the individual charging stations.