Great post. Dave is a great resource on suggestions to improve your charging performance. Another (free?) option to consider since you have a 2720 and thus tongue-mounted batteries is to cut into your trailer cable on the tongue and connect it to the batteries. The factory installation unnecessarily (and inexcusably IMHO) has your charge line running all the way to your converter and then back to the battery. From a schematic point of view you aren't even changing the wiring diagram but you are actually eliminating a good 20-30 feet of cable run. If your results match what I observed when I first did this change, you will be blown away at the improvement. I rank it as the single most bang for buck mod I have done to my TM (right above mounting a vinyl shower curtain to the folding bathroom walls)
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