Solinteng wattsonic (pv)
The Solinteng wattsonic is a hybrid solar inverter, sold under the Wattsonic brand and distributed across several European markets. This template connects via Modbus TCP and reads the live PV generation power from register 11028, giving you a real-time watt-level view of solar production. The ModbusCloud Gateway polls the inverter over your local LAN at port 502 with unit ID 255, requiring no additional RS485 wiring. Tracking this single production figure in your portal is the foundation for yield verification, threshold alerts, and site-level energy reporting.
- Protocol
- Modbus TCP
- Connection
- Ethernet, Modbus TCP
- Registers
- 1, read only
- Brand
- Solinteng
- Compatible models
- wattsonic
- Last updated
Registers (1)
1 read, 0 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| power | W | Read |
Loading registers…
Send your device list
If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Monitor live PV generation power to verify that solar yield matches expected irradiance for the site.
- Alert on a sudden drop in reported power during daylight hours to detect inverter faults early.
- Compare daily peak power readings across multiple Solinteng wattsonic installations on one portfolio dashboard.
- Track PV output trends over weeks to identify gradual panel soiling or shading issues before they affect yield.
- Report instantaneous generation power to a building management system to coordinate load scheduling.
Installation
Connect the Solinteng wattsonic inverter to your local network using its LAN or WiFi/LAN communication module, then confirm the inverter's IP address is reachable from your network switch.
Connect the ModbusCloud Gateway to the same LAN segment as the inverter, ensuring both devices are on the same subnet and that port 502 is not blocked by any firewall or VLAN rule.
In your ModbusCloud portal, add a new device, import the Solinteng wattsonic (pv) template, and set the unit ID to 255 and the TCP port to 502 together with the inverter's local IP address.
Trigger a manual poll in the portal and confirm that register 11028 returns a plausible positive watt value during daylight; if the inverter is off or it is night, expect zero or a negative sentinel.
Things to watch for
Why does register 11028 always return zero or an error?
Confirm the inverter's LAN or WiFi/LAN module is active and assigned an IP address on your network. The Wattsonic communication module must be connected and show a stable link. Also verify that the unit ID is set to 255 in the ModbusCloud portal, as the inverter defaults to this address.
The gateway connects but the power value looks wrong or jumps wildly.
Register 11028 is a signed 32-bit integer (int32) spanning two consecutive holding registers. If your polling tool or a third-party integration uses a 16-bit decode instead of int32, the value will appear corrupted. Ensure the template's data type is set to int32 and that no additional scaling factor is applied, as the value is native watts.
Connection times out intermittently even though the IP is reachable.
The Wattsonic LAN module can drop idle Modbus TCP connections. Increase the portal polling timeout to at least 10 seconds and reduce polling frequency if you observe repeated timeouts. Some users report that Wi-Fi connectivity is less stable than a wired LAN connection for sustained Modbus polling.
The inverter is reachable on the network but modbus returns exception code 2.
Exception code 2 (illegal data address) typically means the address offset is wrong. The Wattsonic register table uses zero-based addressing, but some documentation lists addresses with a plus-one offset. Verify that address 11028 is used exactly as specified in this template, without adding or subtracting 1.
More Solinteng templates
Want to see how it works?
