HELPING THE OTHERS REALIZE THE ADVANTAGES OF SOLAR DC CABLE

I see in most within your schematics that you wire the solar panels in sequence (rather then parallel). Is there a certain reason behind that? Thanks!Q2: I've a non-isolated Orion twelve/twelve 30A charger. It only has a person destructive as compared to 2 negatives over the isolated version. All of you diagrams have the isolated Variation. Need to