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The red wire (positive pole) for ++ terminal (++ terminals are all positive, just connect any one);
The black wire (negative pole) for -- position (-- all terminals are negative, you can connect any one); see the
picture below (5KWh terminal diameter is M5, 10KWh terminal diameter is M8):
6.2 Communication crystal definition
The definition is as follows:
The sequence is inverter serial port 485, CAN; battery parallel serial port 485, 485; and pin definition: