Or do like we do. You said you already have a residential refrigerator. So, keep containers of water in the freezer section of your residential refrigerator. When the water turns solid and becomes ice, just throw the ice into an ice chest and use the ice chest as a secondary cold storage place. This way, you don't have to rig up anything. Simple, works well, and doesn't cost anything except the price of a new cooler.
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2019 Montana High Country 375FL
2014 Chevy Duramax HD 6.6 - 3500 Diesel Dully Long bed Crew Cab
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