From my 3 hour test, it appears the ARB ZERO 47 QT fridge can run for about 60 hours on a Goal Zero Yeti 400 lithium battery (Uses 4-5% per 3 hours). Room temperature was 72°, fridge was filled with food, and no other devices are plugged into the battery. The fridge was first cooled down to 40° via it’s AC plug using shore power prior to the test (I wasn’t interested in seeing how much battery is used to initially cool it down).

UPDATE: after 20 hours into the test, it is averaging 1.3% of the battery per hour. That equates to about 76 hours of run time, so a little better than what I was initially calculating out. I later checked it at 31 hours into the test and the battery was at 58%.