Ktmrfs said: And finally, the weakest link in most trailers isn't the battery, it's the WFCO charger which almost never will go to bulk charging mode so (1) batteries never get fully charged and (2) charging current limits to around 10A which means you can run the generator all day and not get the batteries charged. Solution is a Iota or Progressive dynamics converter.
I have found this to be true in my camper. I use an inexpensive manual battery charger to recharge my battery. Works faster than the WFCO OEM charger. But the reason for your battery discharging so quickly may be because of parasitic battery loads. If you have a Dometic fridge it may be that the door heater to control door condensation is always on. Some models have a switch to turn it off. But some models such as mine lack a switch. If yours is like mine you can install your own switch by cutting the heavier red wire inside the fridge interior light and installing a switch there. I did this and it extended the battery life by days.
