Charging RV batteries with tow vechicle

Russell Clifton wrote:
Have any of you folks installed the necessary wiring and components so you can charge your RV batteries while you are driving?

You certainly want a charge line but presumably you realize this TV > trailer charge line (Pin 4 on your Bargman connector) isn't designed nor is it capable of "recharging" a significantly depleted deep cycle battery but rather is there simply to maintain as close as it can to a full charge on the trailer battery as it's being drawn down by the trailer's parasitic draw and anything else you may be running at the time, such as the fridge, so you don't arrive on site with a depleted battery. :W