https://www.amazon.com/AstroAI-Refrigerator-Portable-Freezer-Compressor/dp/B088FF4R3Y/ref=sr_1_2?crid=1YHBJ4E1MLISJ&keywords=astro%2B12v%2Bfridge&qid=1638214147&qsid=133-1164070-8671614&sprefix=astro%2B12v%2B%2Caps%2C217&sr=8-2&sres=B088FF4R3Y%2CB088FDTTY4%2CB07S2RBCT5%2CB0813V8HFH%2CB081Z4XDQL%2CB07KZLJ7PB%2CB08P4TC5XV%2CB089GJ975H%2CB0771S9XT8%2CB08D96GJJL%2CB08S3FF5GH%2CB08GS9ZLQ9%2CB07L43W4MF%2CB08G1BBBQW%2CB0811NJYYV%2CB08BJT3LYP%2CB0832WZ8K8%2CB07Y8TXQHD%2CB096RQ24HJ%2CB08YP857WR&srpt=REFRIGERATOR&th=1
I've been using on of these for a number of reasons for 6 months now. It's been through a lot of chit (including a mad dash with lots of airtime in the Jeep down 15 miles of fire road when my daughter had an emergency at 2AM while camping) without breaking a sweat. Will last on a standard Jeep size AGM for 2 days without even putting a noticeable dent in cranking speed when starting. No more wet food, buying $20 ice, etc. 110VAC and 12VDC adapters included.
Couple of learning points:
1. Plug it in with the battery off and compare the voltage on the screen to actual voltage on the battery to determine protection levels. The "High" protection turns off at 12VDC at the fridge, which by the time it makes it through 15' of Chrysler wiring is pretty much any time the engine is turned off. "Medium" seems to work just fine for us.
2. Set the temp to 5-10* below what you want since the sensor is in the walls, which are colder than the air in the fridge. Mine is usually set to 27*F to make for 33*F fridge temps. Beware that any liquid containers directly touching the walls
will eventually freeze after a day or so.
3. 58 quarts is almost like a 100 quart cooler since you won't have half the interior taken up by ice.