I re-positioned my battery separator last night to allow for more 'breathing space' around the unit. I figured out that this thing only gets hot when its working. Duh. Being new to this type of stuff I wasn't sure if it would stay hot all the time or not. It only seems to heat up when the engine is running (alternator charging) or if I'm connected to shore power and my Tripp Lite inverter/charger is charging the battery.
Lesson learned, van wired, now on to propane installation.