Introduction
The Growatt MOD TL3-X is a versatile inverter designed for various photovoltaic (PV) applications. When integrating it with a smart meter such as the Eastron SDM630 Modbus, correct wiring is crucial for ensuring accurate data collection and communication between the inverter and the meter. This article provides a detailed guide on how to wire the SDM630 Modbus to the Growatt MOD TL3-X inverter.
Video Guide
Wiring Diagram Overview
The provided wiring diagram illustrates the connection between the MOD TL3-X inverter and the Eastron SDM630 Modbus meter. It shows the RS485 communication lines that are used for data exchange between the two devices.
- PortA (RS485A) on the meter side is connected to Pin 7 on the SYS COM plug of the inverter.
- PortB (RS485B) on the meter side is connected to Pin 8 on the SYS COM plug of the inverter.
Step-by-Step Wiring Instructions
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Identify the Ports:
- On the SDM630 Modbus meter, locate the RS485 communication ports, labeled as Port A (RS485A) and Port B (RS485B).
- On the Growatt MOD TL3-X inverter, find the SYS COM plug where these wires will be connected.
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Connect the Wires:
- RS485A (Port A): Connect this wire from the meter to Pin 7 on the SYS COM plug of the inverter.
- RS485B (Port B): Connect this wire from the meter to Pin 8 on the SYS COM plug of the inverter.
Ensure that the connections are secure and that the wires are correctly placed in their respective pins to avoid communication issues.
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Power On and Configure:
- After completing the wiring, power on both the inverter and the meter.
- Check the inverter’s interface to ensure it recognizes the meter and is correctly receiving data.
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Troubleshooting:
- If there are issues with data communication, double-check the wiring connections for any loose or incorrect placements.
- Verify that the RS485 settings (such as baud rate and communication address) match between the meter and the inverter.