Thanks for the video! Have the same problem with my 2023 Winnebago Solis pocket. Seems the house batts are not charging while driving. Was hoping to be able to remedy my self!
I fully understand your trials in DIY repairs to an electrical system. I installed one on my Microcamper (Promaster City). I recently upgraded the battery to Lithium because my AGM voltage dropped below the 12v fridge’s low voltage cutout way too early. I highly recommend getting Lithium batteries and a dedicated DC-DC charger when the time comes. The ‘smart’ alternator references the highest voltage it senses (usually the chassis battery). The DC controller can be configured to optimize charging for any battery (AGM or Lithium) Enjoy Florida!