Faulty wiring in giggy box

[Zookrew]

Brought home our new '22 22mls on Monday. Set it up at home, no problems. By Friday we had no power, although solar was working and lithium battery was charged.
By process of elimination, we found a blown 15-amp fuse in the giggy box, in the connector that's supposed to control the side solar port. This connector should have nothing to do with the entire rv power.
This unit was on the dealer lot for a few months without power issues. It originally had the 2 regular batteries - we had the dealer replace with a lithium. I know this involves new wiring, so I'm wondering if our problem goes back to the dealer wiring or if it came from keystone this way. The piece circled in blue is the connector that keeps blowing

[chuckster57]

Welcome to the forum

Simply changing from flooded 12V batteries to a LiPo battery shouldn’t have required any “change” to the wiring, just the converter if it wasn’t lithium compatible.

Since it’s for the portable solar on the side, I would be looking at that wiring.