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Kostal - Plenticore plus and Plenticore G3

Configuration Guide for Kostal Plenticore plus (3.0 (G1) G2, 4.2 (G1) G2, 5.5 (G1) G2, 7.0 (G1) G2, 8.5 (G1) G2, 10 (G1) G2) and Plenticore G3 (S 4.0, S 5.5, S 7.0, M 8.5, M 10, M 12.5, L 15, L 17, L 20)

Written by Timo Streckfuß

Before you start

Before you begin, make sure:

  • The inverter is physically installed and powered on

  • The inverter is updated to the latest software version

  • You have the master key from the inverter's rating plate

Step-by-Step Instructions

1. Connect the inverter to the network

  1. Connect an Ethernet cable to port 1 on the inverter

  2. Verify the connection is established by checking the inverter display

image

For network infrastructure requirements and troubleshooting, see Infrastructure requirements for the gateway.

2. Plug&Play discovery and configuration

This inverter supports Plug&Play, requiring no manual configuration. It is automatically detected during gateway commissioning and configured with the appropriate settings after connection.

3. Discover the inverter in the commissioning wizard

The inverter is now ready for the commissioning wizard. The gateway will scan the network to find available devices, which may take a few minutes. Once complete, the Kostal inverter will appear on the results page.

When the inverter is detected, in most cases set the asset type to Hybrid (PV and Battery) from the dropdown.

If you are using the inverter exclusively as a PV inverter, select PV System. If it is used solely as a battery inverter, choose Battery.

4. Connect the inverter to the gateway

After the scan completes and the inverter is discovered, click Next in the commissioning wizard to proceed to the connection screen.

  1. Enter the master key of the Kostal inverter (located on the rating plate).

  2. Click Connect to establish communication between the gateway and the inverter
    ​

Country-specific configurations

Germany

Applies to PV installations exceeding 2 kWp installed after February 24, 2025.

For detailed information refer to §9 EEG (2025) – 60% feed-in limitation

No additional inverter configuration is required. The inverter controls the grid feed-in limit directly (GCP Limit), supporting energy management optimization.

Set the following Energy management setting in the commissioning wizard:

  • Allow optimisation: Yes

  • Grid feed-in limit controlled by inverter: Yes

Additional Information

KSEM meter configuration: If you have a KSEM meter connected via Ethernet, the scan may detect two meters: the Smart Energy Meter and the Power Meter. Configure the meter at the grid connection point (same IP as the inverter) as the grid connection point and set the other as Not set.
​Active power limitation (third-generation inverters): Do not change the Limitation of the active power setting in Service menu → Energy management. Changing it may prevent the inverter from working at full power.

FAQ

Why isn't the inverter appearing in the commissioning wizard?

Check that the Ethernet cable is firmly connected to port 1 on the inverter. Restart the gateway and wait for the network scan to complete.

If the inverter still doesn't appear, configure it manually. See How do I configure the inverter without Plug & Play?.

How do I update the firmware of the inverter?

The firmware update can be performed through the inverter's web portal.
For detailed update instructions, refer to the official Kostal documentation.

Why do I see two meters in the scan?

If you have a KSEM meter via Ethernet, both meters may appear. Set the one at the grid connection point (same IP as inverter) as the grid connection point, and set the other as Not set.

Should I enable smart battery control?

No, turn it off when using external control via Modbus TCP. The gateway manages the battery directly through the Modbus protocol.

How do I configure the inverter without Plug&Play?

Use the inverter's built-in web portal to configure it manually.

Access the inverter settings

  1. Open a web browser and access the inverter's web portal

  2. Log in as Installer using the master key and the service code

Enable communication via Modbus

  1. Navigate to
    ​Settings → ModModbus/Sunspec (TCP)bus

  2. Configure the following Modbus settings:

    • Byte order: little-endian

    • Activate Modbus: Activated

    • Modbus port: 1502

    • Unit ID: 71

  3. Save the Modbus settings

Configure battery settings:

  1. Navigate to
    ​Service menu → Battery settings

  2. Configure the following settings:

    • Battery control: External via protocol (Modbus TCP)

    • Activate smart battery control: Disabled

  3. Save the settings

  4. Navigate to
    ​Service menu → Settling time

  5. Configure the following settings:

    • Mode: Power limit gradient

    • High-priority: 1000 W/s

    • Low-priority: 1000 W/s

  6. Save the settings

Once everything is configured, continue with the commissioning wizard as normal.

Supported models

Plenticore plus Series

  • Plenticore Plus 3.0 (G1) G2

  • Plenticore Plus 4.2 (G1) G2

  • Plenticore Plus 5.5 (G1) G2

  • Plenticore Plus 7.0 (G1) G2

  • Plenticore Plus 8.5 (G1) G2

  • Plenticore Plus 10 (G1) G2

Plenticore G3 Series

  • Plenticore G3 L 15

  • Plenticore G3 L 17

  • Plenticore G3 L 20

  • Plenticore G3 M 8.5

  • Plenticore G3 M 10

  • Plenticore G3 M 12.5

  • Plenticore G3 S 4.0

  • Plenticore G3 S 5.5

  • Plenticore G3 S 7.0

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