The basic test to see if a box is insulated well enough for a 12v Danfoss unit can keep it cool is very simple.
Place a large (25lb+) block of ice in the box , let it sit for a day and weigh it .
Wait a day or two and weigh it again.If it looses (melts) under 5lbs per 24 hours , your in luck the insulation is fine. The extra space from the removed eutetic plates is great.
If the ice melt is over 5lb a day re-insulation , or a second unit for the freezer section works , buy you may need a bigger house batt bank.
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