How to replace the Main Control Module

  Note: Operate in sequence, do not operate (2) first, then (1), otherwise an arc will occur
   （1）Disconnect ① circuit breaker;

   （2）Pull out all positive and negative fuses;
   （3）Multimeter measurement confirms that the voltage between modules PV + and PV- is 0v;

   （4）Display all the wiring marks of the host module and take pictures, or record the terminal wiring

corresponding to the wiring mark, follow the original wiring, and reinstall it after disassembly;

   （5）The flat-blade screwdriver releases the buckle downwards and removes the host module.