Charging system

[robert and mill]

Charging system is putting out 13.4 volts. Is this normal or do I have a charger/converter problem. I just put in 2 new batteries. One thing I noticed I don’t hear the sound of fan . On my other campers I could hear fan on converter. This is on a 2013 keystone cougar 318sab.

[JRTJH]

13.4 VDC is appropriate output for the WFCO converter in "maintain mode".

The fan is directly linked to the amperage output (not voltage output) of the converter. If there is a significant load on the converter (lights, furnace motor, landing gear use, extended slide motor use) that draws increased amperage (not voltage) or that discharges the batteries and calls for "increased recharging capacity" (amperage increase) then the fan will come on to cool the transformers in the converter as they provide more amperage and heat up. The fan is "amperage driven" and will increase in speed as the amperage demand increases to the converter.

ADDED: In past years, most of the overhead lighting in RV's was incandescent bulbs. One incandescent bulb can draw as much amperage as 10 or 20 LED elements, so in the past, turning on two or three overhead lights would "trigger the converter fan". In today's RV's, with LED lights, you may not notice the fan in the converter until nearly every LED light in the trailer is turned on and maybe, even then, the fan won't be noticeable.

[Customer1]

13.4 is good, nothing to be concerned about. Unless defective the fan only runs when needed.

[bobbecky]

Prior to us replacing all the interior 12 volt bulbs with LED's, we could get the fans running by just turning on all the overhead lights in the trailer and now, with all of them LED's, I can't remember the last time I've heard the fans run, so that is a good indication of how much load the incandescent bulbs draw compared to LED's.