Charging 5er batteries while driving, question.

If you have a battery disconnect, it may have to be hot (on) to charge. I learned that the hard way when I showed up at my boondock site with batteries that weren't fully-charged, despite being plugged in at home for 3 days. I did also confirm that my rig will also not charge while plugged into my truck if the disconnect is cold (off).

Lyle