Marshfly
WKR
That is made for boats. It's called a chiller plate or freezer plate. For offshore you just dump a bunch of seawater in the box and it gets slushy. Sweet as hell. But highly maintenance intensive. The issue is they are designed to use a water exchange with raw water to shed the heat pulled from the unit.It would be really nice if someone could make a refrigeration unit that could be retrofitted into a 150 qt cooler. You'd be a millionaire. We use our 150's to store gear on the way out and haul meat on the way in. About 10 -1 lb packs of dry ice in each one freezes the meat overnite in 70 plus degree weather and gets you home without thawing in 90 plus degree heat .
TLDR, it's going to be way more expensive than a 7cuft freezer and it will require similar power.