Thor Forums

[sanjaun2]

There are so many variables with your batteries and load put on them from your coach to try and fully determine what is going on. Battery charging is very complex. simply put if your batteries get discharged 50% of capacity which is 12.06 volts in a rested battery. ( no draw for several hours) and you try to charge them with your generator it starts charging quickly (bulk charge) The voltage goes up but it does not mean your batteries are fully charged. As the battery charges it accepts less and less current. so, The last 10 % or so takes many hours. Like 8-12 hours or more. You will just be wasting gas running your generator. Your lead acid batteries should be charged at 13.2-14volts before going into float voltage around 13.2 volts. It sounds like you are not achieving these voltages and your batteries are not getting fully charged. You need to put in a disconnect switch to isolate your batteries or find a way to hook up electrical power to charge your batteries in storage, or Add solar panels like I did. My batteries are fully charged for free every day. Best way to kill a battery is to discharge below 50% frequently, and not fully charging it often.