On a recent trip in our 2004 Wilderness 5th wheel, we ended up dry camping for a couple of days. According to our meter we used 1/3 of our battery power. I have two deep cycle marine batteries installed in the camper. The trip home was 4 hours, and in that time frame the meter still indicated 2/3rds charged. What's the average charge time for batteries when charging from a running vehicle. Both batteries charge fine when plugged into 110 and charging from the converter. Thanks in advance for your replies!