What is the pin definition if I want to parallel three X3-Mega-G2 using modbus?

The Pin7&Pin8 is used to conenct meter 24&25 port, Pin4&Pin5 of the first inverter is used to conenct the next inverter Pin1&Pin2. The inverter which is connect with meter should set as master, others should set as slave. You need to set the master RS485 Address 1, and slave should be 2、3. What's more, for modbus paralle, you can connect up to 5 inverters. If you want to more about this type of inverter parallel related, kindly contact solax support or refer to the user manual.