After spending countless hours researching and troubleshooting, I finally managed to connect my Growatt MOD TL3-X inverter to Home Assistant using ESPHome Modbus. The journey wasn’t without its challenges—googling led me to conflicting examples, limited documentation, and some outright incorrect configurations. But persistence paid off!
I documented every step of the process, from the components I purchased to the wiring setup, and even included a tested ESPHome configuration. The goal was to make the integration as seamless as possible for others who might be tackling the same project. You can find all the details, including the necessary parameters and icons for Home Assistant, in my GitHub repository: GitHub - JasperE84/Growatt_ESPHome_ESP32_Modbus_RS485_Example.
The setup involved an ESP32 module and a MODBUS RS485 link, which proved to be the perfect combination for reading the inverter data directly. I also made sure to include references to the Modbus registers documentation to help others understand the data flow better.
I hope this guide saves someone the frustration I went through and helps them get their Growatt inverter up and running smoothly with Home Assistant. Happy tinkering!