Suspected Converter Problem

LipschitzWrath wrote:

BFL13 wrote:
The usual arrangement is to have the converter wires to the fuse panel and fuse panel "battery" wires go to the battery. It is unlikely yours is any different, but you can check for that.

Two wires on pos battery post is normal if not more. One to fuse panel pos battery lug (fused near the battery), one for the emergency breakaway switch (not fused), and one for the slide (fused)

Two wires on the neg post can be one for going to the frame as your "ground" and another for ? ( I had two neg wires and never did find out what the second was for. It must have been to the frame too, because it didn't matter which one I used or if I used both.)

You might have done something that explains all this when you installed the new batteries. Always look at the last thing you were working on if something is wrong :(

Fair point.

That said, the converter sits on a wall in a storage compartment. This wall is shared with the battery storage compartment. I cannot express to you how closely these two sit. The wires might be 28 inches long. Maybe. You can tug on the wire in one compartment and see it move in the other.

The arrangement is as I described. I'm not making this up. I don't know if this is original, but I sure as hell didn't touch it.

The dc panel on the other hand, sits 25 feet away in the living area.

It seems contrived to wire it the way you describe for this particular arrangement.

That sounds normal for a deck mount which can be put close to the batteries. Good.

So the pos and neg should go from converter to battery posts in the two short wires and you should get almost the same voltage at the battery as the converter.

Next, there should be another neg wire from battery neg to Rv frame as the ground. There should be a long pos wire going from the battery to the DC fuse panel.

That would be all normal. You can't lose any voltage going from converter to battery on those two short wires unless there is some loose connection, or else a fuse or DC breaker on the pos short wire that is partially open. Easy to test for and fix.

Your converter will supply the DC fuse panel from across the battery using those battery to fuse panel wires you say do work, so no problem there.

Of course (ahem, ahem)your converter to battery wires go across the battery bank ina balanced way and you don't have an upstream and a downstream battery. And your RV load wires are on the same two posts as the correct posts for the converter's two wires.