Gateway:

First, that was to replace Solax Smart Meter(original meter impossible to buy) and Solax X1 mini Inverter.

Inverter:

• Solax - X1 mini any model , Gen2
• Deye - DSUN-3.6/5/6K-SG03LP1-EU
• Can be any Mete

Meter RS485 Modbus:

• EASTRON SDM230 1P or 4P
• CHINT: 1P or 3P
• Can be any Meter with Import Export Watt.

More Details:

• syssi/esphome-solax-x1-mini#20

Board.

• STM32 F411CE 8Mflash: https://www.aliexpress.com/item/1005001456186625.html

  or

  ESP32 any board.

• UART - RS485: https://www.aliexpress.com/item/32705625990.html

Version

• solo: esp32 or stm32 - need to change UART and config.py.
• espnow: use two board esp32. One as Server, second as Client. for wireless data exchange Inverter and Meter.
  • https://micropython-glenn20.readthedocs.io/en/latest/library/espnow.html