jawsthemeswimming428 wrote:
The next day, there was definitely no power from the battery because even the Carbon Monoxide alarm had no light. Today, our longer cord came and I plugged the trailer in. Within 30 seconds of being plugged in I checked the battery level and it showed 100% full. Am I missing something? It definitely showed empty before that. Any advice would be appreciated.
Your battery is obviously significantly drawn down, perhaps to the point where it's damaged and would need to be replaced. Normally you'd only want to draw it down to ~ 50% or ~ 12 volts ... fully charged it would be ~ 12.7 volts. When you plug the trailer's main service cable into power the converter's output is then being read by that battery monitor, not the battery itself. Just leave it plugged in for a couple of days and see if the battery recovers ... if not, you'll have to replace it.