I am currently having exactly this problem with my 2022 Montana HC, which we drove off the lot three weeks ago. We had to leave overnight without warning and the fridge drained both batteries completely. When we got back, I was able to secure the pigtails we needed to connect to our building power, including a surge suppressor, and we hooked up and everything worked fine. I disconnected and hit the road two days ago. Our first stop did not have a power option. The batteries are fulling charged, all DC devices work just fine, but the inverter outlets (including the fridge) are dead. The odd thing is that the remote display panel on the CSW inverter has power and shows full batteries, but nothing is going to the inverted outlets, which were fine before we drained the batteries. The battery disconnect is on and working because, when I turn it off, the CSW display panel loses power.
Unfortunately, I'm unable to find a warranty-certified shop that can take us before April and most are saying they cannot get a replacement for the inverter (if it is indeed bad) for 2-6 months. We're having to redo our entire itinerary so we do not have any powerless stops. It's a bit of a pain.
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