MH Coach Battery charging
One of the problems with the Motorhome battery disconnect switch is that the light on
the switch, misleads a person into thinking that because the light on the switch is on
the batteries are bring charged. The light on the switch only indicates that there is power available on the 12VDC buss and does not indicate that the batteries are being charged .
As an example try the following : disconnect the motorhome from shore power and operate the battery disconnect switch.
The light on the switch will gradually go out. Indicating that there is no power on the 12VDC buss.
Now with out touching the battery disconnect switch plug into shore power, the light on the switch will come on even though the batteries are not connect to the 12VDC bus.
In this state it appears that the batteries are being charged. Because of this many have gone to trouble of purchasing/installing additional chargers thinking that the original converter is not capable of bring the batteries to full charge, when actual fact the converter was not charging the batteries in the first place.
Now this is my understanding of the 12VDC battery/ converter circuit, if anyone has a different view of this I would appreciate hearing from them.