I need to connect 3 similar 180W solar panels to my MPPT. Each one outputs max 9A. I would like to send a + wire and a - wire for each panel back to either a bus bar or a fuse box... and then use a 4AWG jumper from the bus/box to the MPPT controller. if the fuse box is even necessary.
So to clarify, I want to 'gang' up all of the + and all of the - at one point, either the bus bar or fuse box.
The MPPT can handle input of 50A max.
Is this possible, and do I need fusing at each hot line carrying 9A? It should be well within my MPPT to handle all 3 panels unfused. I'm just worried if I gang up all of the hot lines can a 27A short somehow appear at one panel and ruin it. Please advise.