External Low-Voltage Shutoff
Am sure there are less costly items than this, although it's not too bad. But, this might be a nice item to put in line with those "nice to haves" so that you don't overdrain. Problem with this is: probably can't set the cut-off voltage. Still, it's got me thinking....
http://www.amazon.com/Koolatron-Battery ... 879&sr=1-1
2006 RB50 6.0 Diesel
Flatplate water heater (mounted INSIDE), portable butane stove (no propane)