I will soon be pulling new wire for both graphs, using tinned 14 ga. wire, independent runs for each unit, directly to the battery, with both using the same disconnect switch at the battery. The question I have is where I should put the in-line fuse. At the disconnect would be most convenient for troubleshooting, if there was a problem, but is it possible that with the larger wire size, I could potentially be sending too much amperage to the unit downstream from where it transitions to the 18 or 22 ga. wire that plugs into the unit?