Thanks for the input. I've run a trickle charge line from the coach (7 pin trailer plug) to the denali battery (two conductor 16 guage with 20 amp fuse). We just got back from a 3 hour trip to Lake Conroe, no battery issues!!
2014 Phaeton 40QBH
2008 GMC Yukon Denali, Blue Ox Adventa LX, Remco pump, M&G Air Brakes