Well my WF-9855 converter is behaving just like everyone says, no bulk charge available regardless of SOC. And as usual it's gotta be the garbage factory wiring, it's 20+ ft. to tongue mounted Interst...
I posted in your other thread, get rid of the WFCO. My WFCO was in the middle of the trailer, I put a PD 9280 up front under the sofa with short runs to the batteries and have never looked back. Also like I posted before you may want to think about putting in a Trimetric 2025 for a more accurate idea of what's going on with the batteries (or a 2030 if you think solar panels may be in your future).