Has anyone connected a GoodWe solar inverter to a Cerbo GX.
The system has a Multiplus II connected via a VE direct, and 3 x 5000kW Pylontech batteries connected Via VE can bus.
The VRM and remote system shows all this so I knwo this bit is working. What I can’t see is the PV production. So any ideas how I can connect this to the cerbo.
I did try a manual conenction using the GoodWe ip address, but nothing happened.
Any ideas would be greatly appreciated.
Create a Virtual PV inverter in node red, and feed it with data from GoodWe.
Is that a 230V or 48V GoodWe solar inverter?
Its a 230V solar inverter
And how do I get the data from the GoodWe inverter
Check modbus communication.
GoodWe inverters support the SunSpec protocol over Modbus TCP, which allows integration with Victron GX devices (like the Cerbo GX) for monitoring PV production. This is the recommended approach if your GoodWe model is compatible. If automatic detection fails or your model lacks full SunSpec support, you can use Node-RED on the GX device as a fallback to create a virtual PV inverter by pulling data via Modbus.
### Prerequisites
- Both the GoodWe inverter and Victron GX device must be on the same local network (e.g., via Ethernet or Wi-Fi).
- GoodWe inverter must have a LAN module or WiFi+LAN module installed (replace the default Wi-Fi module if needed; purchase from GoodWe).
- Victron Venus OS version 3.60 or later (update via VRM or local console for SunSpec support).
- GoodWe firmware: ARM chip version 13+ for high-voltage models or 15+ for low-voltage models.
- No additional hardware is typically needed beyond network connectivity.
### Step 1: Configure the GoodWe Inverter for Modbus TCP
- Power on the inverter and access its settings (via the GoodWe app, web interface, or display menu—refer to your model’s manual).
- Enable Modbus TCP:
Set the connection type to “Modbus TCP/IP”.
Assign a static IP address on the same subnet as your Victron GX (e.g., if GX is 192.168.1.100, set GoodWe to 192.168.1.101).
Set the server port to 502.
Confirm and save settings.
- Test connectivity: Ping the GoodWe IP from another device on the network to ensure it’s reachable.
### Step 2: Configure the Victron GX Device
- Access the GX remote console (via local IP or VRM portal).
- Go to **Settings > PV Inverters**.
- Enable PV inverter monitoring if not already on.
- Select **Scan** to automatically detect SunSpec-compatible devices on the network.
- If not detected, add manually:
Enter the GoodWe inverter’s IP address.
Set the port to 502.
Select “SunSpec” or “Modbus TCP” as the protocol (depending on your Venus OS version).
- The GX will poll the inverter periodically for data like power output, energy yield, voltage, and current.
- Once connected, PV production data will appear in the GX console overview, device list, and VRM portal (e.g., as total PV power, daily yield).
### Troubleshooting
- If no data appears: Verify network connectivity, firewall settings (ensure port 502 is open), and that the GoodWe is responding to Modbus queries. Use a tool like Modbus Poll on a PC to test reading registers from the GoodWe IP.
- Common GoodWe Modbus registers for PV data (for manual verification or custom setups; SunSpec uses standardized ones starting around 40000-40200 for common metrics):
PV1 Voltage: Register 768 (U16, scale 0.1 V).
PV1 Current: Register 770 (U16, scale 0.1 A).
PV1 Power: Register 772 (U16, scale 1 W).
Daily Energy Yield: Register 3513-3514 (U32, scale 0.1 kWh).
Total Energy Yield: Register 3515-3516 (U32, scale 0.1 kWh).
AC Power Output (total): Register 3008-3009 (U32, scale 1 W).
Refer to your model’s manual for exact maps, as they vary (e.g., for MT/SMT series).
- If SunSpec doesn’t work (e.g., model-specific issue), proceed to the Node-RED alternative below.
### Alternative: Use Node-RED for Custom Integration
If direct SunSpec integration fails, install the “Large” Venus OS image on your GX device (via VRM > Firmware > Install Large Image) to enable Node-RED. This creates a virtual PV inverter in the Victron system by reading GoodWe data via Modbus and publishing it to the dbus/VRM.
#### Steps for Node-RED Setup
1. **Enable Node-RED**:
In GX settings: **Services > Node-RED > Enable**.
Access Node-RED editor: Go to GX IP:1880 (e.g., 192.168.1.100:1880) in a browser.
2. **Install Required Palettes (if needed)**:
In Node-RED: Menu > Manage Palette > Install tab.
Search and install: `@victronenergy/node-red-contrib-victron` (pre-installed on Venus Large).
Install `node-red-contrib-modbus` for Modbus reading.
3. **Create the Flow**:
Add a “Modbus Client” node: Configure for TCP, host = GoodWe IP, port = 502, unit ID = 1 (or your inverter’s default, often 247).
Add “Modbus Read” nodes: Set to read holding registers (function code 03). Poll every 5-10 seconds for key PV registers (e.g., 3008-3009 for AC power, 3513-3514 for daily energy).
Add function nodes to process data (e.g., scale values, combine into objects like {power: value, energy: value}).
Add a “Victron Virtual Device” node (from contrib-victron palette): Set device type to “PV Inverter”. Map processed data to paths like `/Ac/Power`, `/Ac/Energy/Forward`, `/Yield/Power`.
Connect: Inject/Timer > Modbus Read > Function (process) > Virtual Device.
Deploy the flow.
4. **Test and Monitor**:
The virtual PV inverter should appear in the GX device list and VRM as if it were native.
Adjust polling interval to avoid overloading the inverter.type=“render_inline_citation”>
For model-specific details, consult the GoodWe and Victron manuals. If issues persist, check the Victron Community forum for user experiences with your exact inverter model.
Many thanks for that concise explanation. The GoodWe has the WiFi only module so will look into getting a WiFi+Lan module.
It has been solved. I couldn’t get the WiFi+LAN module.
So initially tried a Shelly EM module as I had a spare one, but for some reason it couldn’t get a strong wifi signal. So ordered an ET112 power meter and a USB to RS485 adapter. Hence the delay in replying.
Set up was really straight forward and took about 10 to 15 minutes to do. Told the Cerbo the meter was a PV inverter and it now reports the power coming from the PV inverter and it matches what the GoodWe app says. Sometimes there is a delay with the app but most of the time it reads the same as the power meter.
Many thanks for everyones help
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