Checking back in... Looking at rated amperage is not correct for actual power draw. That is way too high for a compressor fridge.
Found this table below, which would make much more sense.... Still not very clear on what wattage it pulls when running. I would assume ~50W, or 4amp @ 12.5V.... below table would be if it runs at 1/4 hr on the hour (~1 ah/h).
Sounds reasonable. Seems to be in the ballpark with other similar fridges.