Battery cutoff switch - If you are talking about the knife-like switch in my 12 volt fuse box, that is connected.
I'm not aware of any fuse near my battery, but I'll look for it when I get out there.
My neighbor checked for me after I left for home and he said that there is no current running from the converter to the battery. That tells me that maybe the converter is the culprit.
He and a couple of my other neighbors say they don't even use a battery, so maybe I can live without battery power to the lights. I have no expectation of ever moving the trailer again, and the only issue appears to be maintaining the battery enough to sometimes run the slide in/out to clear water off the awning. I have a battery charger, so that is also not an issue.
Anything else I should consider?