Do I need to add fuses - panels to controller
I stopped into my local solar shop today looking for some inline fuses for my solar set up and contrary to some of the information I have read the "solar guy" said I would not need fuses because the power cannot travel in reverse??? These guys have had some questionable advice already so I am looking for real world advice.
My set up is 3 100 watt panels in parallel connected by 3into1 MC4 connectors then two leads to the controller. I have a 30amp resettable breaker on the main power lead between the MC4 junction and the controller but that was left over from when I was going to run in series.
The controller to battery is protected.
I have read I should consider placing small fuses on each + lead of the panels. The LSC of my panels is 6 amps so a 7.5 amp fuse is really my best calculation. I am okay adding a inline mini fuse in a fuse holder but I can only find 12 gauge wiring. It is a very short run from the panel to junction, 2 feet, then less than 10 feet to the controller.
If the fuse is advisable on each panel, is my 7.5amp calculation correct, using the LSC*1.25?
Is the 12 gauge wiring on the inline fuse holders going to cause any noticeable loss? My leads are 10 gauge to the controller.
I have read pages and pages but much of it refers to electrical codes and in Canada our rv's are not bound by codes. I have also read Bob's and others pages but maybe I missed the part about "fuses" on the panels in parallel.