*I think* the alternator is, but the converter seems to be something that just keeps coming up, and I am not sure why I am having so much trouble finding it :)
For the alternator- When we went on the trip, the person that sold us the new batteries had told us to move our trickle charger to the house batteries instead of the chassis. So we had batteries charging.. from themselves. I suspect this is why we lost all power when driving.
When we got home and changed the trickle charger setup, someone else advised we test volts on the batteries which we did- 12 volts when engine was off, and then when we turned it on they went up to 13.6ish. This leads me to think the alternator is working as it should, but the trickle may have been the culprit on the drive.
Am I correct in thinking that with the batteries fully charged from shore power,then disconnecting, we should NOT be losing all battery power within a few days with the fridge on Auto and nothing else on, but of course things plugged in? Does this sound like an issue with the converter/inverter/charger most likely not slowly charging them?
Thank you all again.