System overview

As a PV inverter

If the inverter is used as a pure PV inverter, only PV generators are connected to the DC inputs. There must be at least one PV generator connected to the inverter.

The energy generated can be used for self-consumption in the house grid or is fed into the public grid.

If the inverter is being used as a hybrid inverter, PV generators and a battery are connected to the inverter.

For the battery to be detected at the DC input for the battery, the battery function product upgrade must be activated in the inverter using an activation code.

The inverter is used to directly provide energy for self-consumption or to store surplus energy in the battery storage unit. The stored energy can be used for self-consumption in the house grid. Surplus energy that can no longer be stored is fed into the public grid.

In addition, energy from other AC energy suppliers (park controllers), e.g. PV systems, combined heat and power (CHP) units or small wind turbines, can be temporarily stored.

If the inverter is used as a pure battery inverter, a battery can be connected to the last DC input (BAT).

For the battery to be detected at the DC input for the battery, the battery function product upgrade must be activated in the inverter using an activation code.

Inverter with KOSTAL Wallbox ENECTOR via KSEM

If the inverter and a KOSTAL ENECTOR wallbox with comfort function are installed in the system environment, a KOSTAL Smart Energy Meter (KSEM) must be used as the energy meter.

The KSEM is a three-phase energy meter that controls the wallbox and the inverter via an RS485 connection.

In this case, the entire system cannot be controlled via an MDC host inverter.

This function is available from PLENTICORE G3 SW 3.06.10 onwards.

Further information on configuration and wiring can be found in the supplementary document Wiring and setting up multiple KOSTAL inverters via MDC.

Multi Device Control (MDC) enables central monitoring and control of MDC-enabled inverters and other MDC-enabled devices within the same home network. The control function is performed by a PLENTICORE G3 inverter configured as an MDC host. The MDC host inverter can be operated both without a battery and with a connected battery. If a battery is used within the MDC system network, it must be connected to the MDC host inverter. The battery with the largest usable capacity must be connected to the MDC host.

If several PLENTICORE G3 inverters with batteries have been installed in the home network, these are controlled via an MDC host. To do this, the paid product extension / add-on option ‘Battery Control with MDC’ must be activated on the MDC host inverter. If several batteries have been installed in the MDC system network, the battery with the largest capacity must be connected to the MDC host inverter.

Without the ‘Battery Control with MDC’ product extension, only one battery can be connected to and controlled via the MDC host inverter.

Controlling and regulating other MDC client inverters is also possible without the product extension if only one battery storage unit is used in the MDC system.

The product upgrades can then be activated using the KOSTAL Solar App, the inverter display or the inverter Webserver by going to Additional options and entering the activation code.