Using the Eastron 3-Phase Energy Meter With a Sunsynk 1-Phase Inverter

Summary

This article explains how to correctly wire and configure an Eastron 3-phase energy meter for use with a single-phase Sunsynk inverter. This setup allows accurate monitoring and control when only one phase is used.

1. Wiring Instructions

Follow the steps below to wire the Eastron meter correctly:

1.1 Power Connections

1. Connect Live to Port 4 (L1).

2. Connect Neutral to Port 1 (N).

1.2 Bridging Connections

3. Create a bridge between Port 1 (N) and Port 6 (NA).

4. Create a bridge between Port 4 (L1) and Port 5 (LA).

5. 

1.3 CT Coil Connections

5. Connect the CT coil black wire to Port 19 (1-S2).

6. Connect the CT coil white wire to Port 20 (1-S1).

1.4 Communication Wiring (CAT-5 Cable)

7. From the CAT-5 cable, use brown and brown/white wires only.
   Move or cut back the unused wires.

8. Connect brown to Port 14 (TX+A).

9. Connect brown/white to Port 13 (TX-B).

10. 

1.5 RJ45 Termination

10. On the opposite end of the CAT-5 cable:

    • Insert brown/white into Pin 4 of the RJ45 connector.

    • Insert brown into Pin 5.

    • 

2. Enabling the Meter in the Inverter Settings

Once wiring is complete, enable and configure the meter on the Sunsynk inverter:

1. On the inverter screen, select the Settings (cog icon) in the top right.

2. Select Advanced.

3. Select Multi-Inverter.

4. For CT, choose EX_Meter.

5. Select the correct Meter Model from the list.

6.