Originally Posted by Byron Kinnaman
... The IR (wire loss) is so small that even with 12 to 14 gauge wire the loss is so small you won't be able to detect the difference.
But the effect DOES remain. By now you have probably figured out that I was playing devil's advocate to point out that whether or not voltage drop has any noticeable effect, or even is measurable within reason, it still exists. I think some people may have been left with the impression that line loss does not exists at all with two batteries in parallel being charged.