He takes an old RV refrigerator and makes some modification to it.
He makes a large pancake coil from polytubing and water from his well to make the temperature inside the refrigerator drop. The refrigerator he placed outside by his greenhouse and when his vegetables are harvested, he puts them inside the refrigerator to keep them cool.
This simple conversion of a 3-way RV fridge into a water cooled fridge required only a few easy to find parts and now cools food without using any electric power.
Alternative “Refrigerator” requires no electric power. Keeps my homegrown organic vegetables fresh…