Thanks for the nice comments.
I just returned from a 3 day camping trip with the EdgeStar and it worked flawlessly. We loaded it up Friday morning and headed out of town, the temperature stabilized at 37F during our drive the to campsite. Overnight the temps were in the 40s so the fridge didn't have to do much work, the next day (24 hours without engine running) the battery was still putting out over 12v and easily started the truck. Based on this I'm comfortable expecting more than 24 hours of runtime on my 68AH battery assuming normal use and 70F(day)/40-50F(night) temperatures. Higher exterior temperatures will of course increase the duty cycle and shorten the runtime.
Oh, and the best part was no ice, cold beer, and dry food! Very happy with the fridge so far.
- Matt