SunSynk-ESPHome

ESPHome Project to establish communication with SunSynk 8.8kW & 5.5kW Inverter via RS485 Modbus. The code is based on Modbus registers from SunSynk.

Components.

WEMOS ESP32 Lite V1.0.0 Lolin32 Wifi Bluetooth Board CH340G MicroPython.

https://kunkune.co.uk/shop/esp32-esp8266/wemos-lolin32-esp32-lite-v1-0-0-wifi-bluetooth-board-ch340g-micropython/?fbclid=IwAR130c3W75-MvHVIQRkaq919oVmQM71DfNW_I4CI16sr6qBjoB76vTmjVCs

RS485 module to TTL with Isolation Single Chip Microcontroller UART Serial Port.

https://kunkune.co.uk/shop/communication-boards/rs485-module-to-ttl-with-isolation-single-chip-microcontroller-uart-serial-port/?fbclid=IwAR0-Ap4bn00M6TSlwINBr1PfITM7QJWwbq9NOitrLwNkRpegcCKPePa97Lg

USB power supply and suitable enclosure.

Connections.

5.5kW & 8.5kW with combind BMS 2in1 Port.

The 8kW inverter uses a combined BMS 2in1 Port located below.

8.5kW with Separate CAN & RS485 Ports.

Use Pins 1 & 7 as pin2 isn’t connected on the PCB

Pin1 = Orange/White = (B)

Pin7 = Brown/White = (A)

5.5kW with Separate CAN & RS485 Ports.

Use Pins 1 & 7 as pin2 isn’t connected on the PCB

Pin1 = Orange/White = (B)

Pin7 = Brown/White = (A)

Inverter Settings.

Under the Advance Tab ensure the following settings are set.

Home Assistant Sensors.

Disclaimer.

The project is something I have developed and researched myself. I cannot accept any responsibility for any damage caused to your equipment. Please install at your own risk.