Originally Posted by RFowler265
I have a 2009 Jayco 31.5 FBHS that I have owned for a almost a year now. There are 2 RV batteries in it. When I got it, I noticed that the batteries would drain when it was sitting there for some time not being used. That made sense, because there is always some items that slowly drain a battery over time (microwave clock, etc.). To solve this, I put a disconnect switch in and that works well.
However, I plugged my RV into a 30 amp plug at my house because we needed to use it while my house was being tented for termites. Through the process, the trailer was plugged in for a few weeks. When I disconnected the plug, I found that the trailer batteries were dead again. I had forgotten to disconnect the disconnect, however, shouldn't the fact that it was plugged in caused the batteries to charge? Am I not understanding how those batteries charge?
Any help would be appreciated. Thanks,
Not necessarily. The disconnect isolates the battery from everything in the RV, including from being charged. On another note, most RV batteries only last 2 to 3 years. So if these are original you may want to get them checked at an auto supply store and see if they are still good.
The batteries do charge when plugged into shore power, but, by turning the disconnect off, you isolated them so they could not charge.