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How to configure and connect GoodWe SEC3000C to Reduxi controller

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⚡ Reduxi Controller · Knowledge Base

How to configure and connect GoodWe SEC3000C to Reduxi controller

Connect the GoodWe SEC3000C to the Reduxi Controller via Modbus TCP/IP.

🔧 GoodWe SEC3000C · Reduxi Controller
🌐 Modbus TCP/IP (Ethernet)
🔢 Port 502

📄 Download as PDF

GoodWe SEC3000C smart energy controller
GoodWe SEC3000C
📋 In this article
  1. Technical documentation
  2. Required equipment
  3. Connect the SEC3000C to the network
  4. Configure the SEC3000C
  5. Log in to the Reduxi web interface
  6. Add the SEC3000C to Reduxi
  7. Check the readings
  8. Summary
  9. Common issues
  10. Related articles

1 Technical documentation

The GoodWe SEC3000C is a smart energy controller. According to GoodWe it supports up to 10 inverters via LAN and up to 60 inverters via RS485. It has protection class IP66 and works from -30 to +60 °C.

2 Required equipment

You need the following:

  • GoodWe SEC3000C, powered on
  • Reduxi Controller
  • Ethernet (RJ45) cables
  • Router or switch
  • Computer with Chrome 68 or newer, or Firefox 78 or newer, for the web interface of the SEC3000C
  • Laptop or tablet with internet access to configure the device in Reduxi

3 Connect the SEC3000C to the network

3.1 Physical connection

The SEC3000C supports two network connection methods:

  • LAN (Ethernet): recommended for Modbus TCP
  • Wi‑Fi: less reliable for industrial communication
1
Connect the cable
Connect the SEC3000C to your local network (router or switch) with an Ethernet (RJ45) cable.
2
Power on
Make sure the device is powered on.
3
Check the LED
The LAN port LED must be green or yellow.

4 Configure the SEC3000C

The SEC3000C has an integrated web interface for all device parameters. You can open it from a computer via Ethernet or Wi‑Fi. Use one of the three access methods below.

4.1 Access via direct Ethernet connection (default IP)

This is the most reliable method for the first configuration.

1
Connect the computer
Connect your computer directly to any switch port on the SEC3000C with an Ethernet cable.
2
Set the IP address of the computer
The device and the computer are not yet in the same network. Set the IP address manually: Network Settings – Change adapter options, right-click the adapter, Properties, edit IPv4 settings.
Parameter Value
Computer IP address 172.18.0.22
Subnet mask 255.255.255.0
Default gateway 172.18.0.1

Factory IP address of the device: 172.18.0.12

3
Open the web interface
Open a web browser and enter https://172.18.0.12:443
4
Log in
Default credentials: user admin, password 123456.
GoodWe SEC3000C login page with the initial password 123456
Login page of the SEC3000C
⚠️
Change the password After the first login, change the password immediately. A lost password cannot be recovered without a factory reset.
Prompt after the first login: change the password
1. Prompt after first login
Dialog to reset the password and login with the new password
2. Set a new password

4.2 Access via router (dynamic IP / DHCP)

Use this method when the device is already connected to a local network.

1
Connect both devices
Connect the SEC3000C and your computer to the same router with Ethernet cables.
2
Find the device
Open the admin interface of the router and look up the list of connected devices (DHCP client list).
3
Read the IP address
Find the IP address assigned to the SEC3000C.
4
Open the web interface
Enter this IP address in your browser, for example https://192.168.1.50.
5
Log in
User admin, password 123456 (or your new password).

4.3 Access via device Wi‑Fi hotspot

The SEC3000C has a built-in Wi‑Fi hotspot for configuration.

1
Connect to the hotspot
Connect your computer or phone to the Wi‑Fi network Log-***. The *** stands for the serial number of the device. Default password: 12345678.
2
Open the web interface
Open a web browser and enter https://172.18.0.12:443
3
Log in
User admin, password 123456 (or your new password).
ℹ️
Initial setup only Use Wi‑Fi access only for the initial setup. For stable communication with the EMS, always use an Ethernet connection.

4.4 Set a static IP address

Modbus TCP/IP communication needs a static IP address. With DHCP the router may assign a different IP after each reboot and communication fails. Make sure the Ethernet cable is connected before you change the network settings.

Device ports:

  • ETH1: default mode DHCP
  • ETH2: default mode STATIC

The internal switch is connected to ETH2 by default. Use ETH2.

LAN configuration of the SEC3000C with ETH2 set to static IP
LAN configuration

After login, go to Device Maintenance – Port Settings – LAN Configuration. Select port ETH2 and set the IP mode to STATIC. Configure these parameters:

Parameter Value
IP Address A fixed IP in the same subnet as the EMS, for example 192.168.1.50
Subnet Mask For example 255.255.255.0
Default Gateway Router IP, for example 192.168.1.1
Primary DNS Server Usually the router IP. Required only if cloud communication is used.
LAN / Internet Select LAN

This setting makes the device communicate with local systems (EMS, SCADA), not with the GoodWe cloud.

Click Apply Configuration. Then reconnect with the new IP address, for example https://192.168.1.50:443.

4.5 Configure the Modbus TCP channel

Modbus TCP connects the SEC3000C with external systems such as an EMS, SCADA, Home Assistant or Node‑RED. The SEC3000C is the Modbus TCP slave (server). The EMS is the Modbus TCP master (client).

Go to Device Maintenance – Forwarding Settings – Modbus-TCP and click Add Channel.

Modbus-TCP forwarding settings of the SEC3000C with the Add Channel button
Add a Modbus TCP channel

Configure the channel:

Parameter Value
Channel Name For example EMS_Modbus
Local IP The device IP configured earlier, for example 192.168.1.50
Local Port 502 (default Modbus TCP port)
Master Station IP IP address of the EMS, for example 192.168.1.100
Master Station Port Port used by the EMS
Point Table Selection Import the Modbus register map required by the EMS

Click Confirm to save the channel, then Apply Configuration. After this the EMS can communicate with the device via Modbus TCP.

5 Log in to the Reduxi web interface

You can open the Reduxi web interface in two ways:

Remote
📱
Reduxi app
Via tunnel connection · works from anywhere
🖥️
Web browser
In the local network · via IP address or reduxi.local
📱 5.1 Via the Reduxi app
1
Open the app and log in
Launch the Reduxi app on your smartphone or tablet and log in with your credentials.
2
Open Reduxi devices
Tap the menu icon (three lines, top left) and select Reduxi devices.
3
Activate the tunnel connection
Switch on the tunnel connection and wait a moment until it is active.
4
Open the configurator
Tap Open configurator. The Reduxi web interface opens.
Reduxi app – Reduxi devices
Activate the tunnel connection (step 3)
Reduxi app – Open configurator
Open configurator (step 4)
🖥️ 5.2 Via a web browser
1
Open the login page
On a device in the same network, open a web browser and enter the controller's IP address or http://reduxi.local. You can find the controller's IP address in your router's device list or in the Reduxi app under Reduxi devices.
2
Log in
Username: admin · Password: admin (factory default)
Reduxi Controller login screen
Reduxi Controller login screen
Reduxi Controller web interface
Controller web interface after login

6 Add the SEC3000C to Reduxi

Use these steps to add a new GoodWe SEC3000C or to edit an existing one.

6.1 Basic settings

Log in to the Reduxi Configurator (see ⁠Point 5⁠) and click + Add device.

Add device button in the Reduxi Configurator
The Add device button

In the first step, select the basic parameters of the device:

  • Device type: Hybrid inverter or Battery
  • Type: GoodWe SEC3000C
  • Name: a name of your choice
Basic settings of the GoodWe SEC3000C in the Reduxi Configurator
Basic settings: device type, type and name

Click Next.

6.2 Communication settings

Enter the communication parameters of the GoodWe SEC3000C:

Parameter Value
Connection TCP/IP
IP The IP address of the GoodWe SEC3000C
Port Always 502
Modbus unit ID The Logic address from the Modbus settings of the GoodWe SEC3000C
Communication settings of the GoodWe SEC3000C in the Reduxi Configurator
Communication settings

6.3 Test communication

Click Test communication at the bottom of the wizard. It reads the GoodWe SEC3000C once and saves nothing. If the test succeeds, click Done: only Done creates the device.

Test communication button in the Reduxi Configurator
The Test communication button
Done button in the Reduxi Configurator
The Done button

7 Check the readings

7.1 Last measurements

After communication is established, check the values under Devices – GoodWe SEC3000C in the Reduxi Configurator.

7.2 Enable control by Reduxi

To control the device with Reduxi, set the control type under Devices – GoodWe SEC3000C to AUTO. Then define a strategy as described in Strategies for Reduxi controller.

✓ Summary

Preparation (Points 1–3): Read the GoodWe manual. Prepare cables, router and computer. Connect the SEC3000C to the network by Ethernet.

GoodWe SEC3000C (Point 4): Open the web interface, change the default password, set a static IP on ETH2 and add the Modbus TCP channel with local port 502.

Add to Reduxi (Points 5–6): Log in to the Reduxi web interface, click + Add device, enter IP, port 502 and the Logic address as Modbus unit ID. Click Test communication, then Done.

Go live (Point 7): Check the last measurements. Set the control type to AUTO and define a strategy.

→ Common issues

Issue Solution
No access to 172.18.0.12 Set the IP address of the computer manually to 172.18.0.22 with subnet mask 255.255.255.0 (Point 4.1). Use https and port 443.
Communication stops after a reboot The device probably uses DHCP and got a new IP. Set a static IP on ETH2 (Point 4.4).
Password lost The password cannot be recovered without a factory reset. Change the default password after the first login and store it.
Open configurator does not open or stays empty The tunnel is not active yet. Wait about 30 seconds and check that the controller is online.
Login with admin is rejected The password was changed during installation. Ask the installer. The Reduxi account password does not work here.
reduxi.local does not load Your device is not in the same network as the controller. Use the IP address or the tunnel connection.
Communication test fails, device shows offline Check reachability, IP address / port / unit ID, and that the protocol is enabled on the device.

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