hi,
do you have the merge switch on? are we only talking about the coach batteries or the starting batteries or both?
it is hard to tel on how long it takes to charge a battery while driving. each battery has what is called an "acceptance rate", based on the total amp hours of the battery bank, the degree to which it is discharged and the type of battery it is. AGM's have a higher acceptance rate than wet cells.
having said all that and assumming you have a 160amp alternator or so, and you drove at day, they likely should have charged in 3-4 hours.
many folks run their genny's for a few hours each day to top off the coach charge when dry camping.
it is a simple thing, just hard to find.
1. a bad battery or
2. a bad connection or
3. a steady current draw you dont know about
4. or a bad charger. it would have to be both the charger and the alternator.
or a combination of the above.
i welcome anyone else to add in. i could be wrong about any of this....
tom
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