Originally Posted by GreenImp
Have you traced that wire from the 40a fuse all the way to the converter? There may be additional circuits branched off of that line which could explain the 40a fuse (assuming the wire is properly sized for 40a load).
Sorry about the delay (camping off the grid) I traced that small wire (#12 AWG) that has that 40A inline fuse until it penetrates the floor into the converter, but I did not remove the cover of the converter to see what it connects to. There is no additional circuit breaker/fuse before the floor.