This is my first posting, but I have been vistiting this forum for over a year now. For someone new to RVing, this is the place to learn. I have a 2005 Rockwood TT that we purchased for family outings. I have had it for a little over a year now and have not had any problems until now. I keep my TT connected to the electricity at my house when I'm not using it. Sometimes when we cannot get away for the weekend, my kids (9 & 5) and I, will stay in the camper and watch movies. This past weekend I woke up to a loud churping noise. I found that the lights did not work and the battery was nearly dead. However, the TV and microwave still work but the furnace or AC will not. I checked all of the fuses and breakers in the trailer, and in my house. I could not find anything obviously wrong. My question is, could there be something wrong with my power converter? Or, could it be because my battery is bad? I will appreciate any suggestions. Thanks.