I have a 29RL Sunset Trail travel trailer that is having a battery charging issue. When the trailer is plugged into an external AC power supply the battery seems to die off over time. I will find the refrigerator will cycle on and off when the battery voltage gets low and the "auto" switch is turned on so the propane should take over, but unless you turn on an AC electrical device (something with a higher load demand an external heater or electrical oven) the DC converter doesn't come on to charge the batteries. I have replaced both batteries after a 5 year period, but the problem has resurfaced shortly after which leads me to believe I have a sensing or switching issue. If anyone has had the same problem and can assist me with my issue please let me know what I need to do to fix it.
Thanks in advance! Victor