300W Solar Panel Kit Complete 12V USB With 10-60A

Controller connection steps(see the last picture)

1. Connect the positive and negative poles of the battery as shown in the picture,
    the controller will detect the battery voltage automatically ;
2. Connect the solar panel to the controller;
3. Connect the load as shown, don't connect it reversely;
Note: Please connect in strict accordance with the picture shown,
otherwise, it may cause the controller short circuit; 
the disassembly sequence is opposite to the connection ...