This is a brief analysis of propane and compressor refrigerators in long term grid-down appplications.
In Northwest Montana life has not changed radically during the Coronavirus lockdown, and there are plenty of used freezers, and fridges available on Craigslist. However, demand for propane refrigerators is on the increase as there is marked rise in interest in self-reliance. If nothing can be found in your area, then be willing to travel to buy a used propane refrigerators before they are gone. These are expensive and hard to find. At the least, these can preserve meat while you jar it up, and provide back up and off grid refrigeration. These will become increasingly expensive and harder to find as the current situation evolves, so this might be a good time to check in your area and use the funds to buy a propane-burning absorption refrigerator instead of standard freezer, 120AC, or 12VDC compressor type refrigerator, that may or may not be still available in your area, when the propane option might still be. JWR Adds: One option is contacting large recreational vehicle (RV) and fifth wheel trailer dealerships. They often have used RV refrigerators available with cosmetic issues (typically just scratched or dented doors) that make them very affordable.
A typical used 10 to 12 cubic foot propane fridge might run $700 or more. A new one is twice that price, or more. And full size propane refrigerators are like hen’s teeth. New refrigerators of the standard 10.5 cubic foot size start at $1,200, and for the largest size, $2,500 new.
The typical 10.5 cu ft. size, set to the lowest temperature for summer operation, will use no more than three 20 pound propane bottles per month during the summer months, or to be precise, consumes 1,200 to 1,600 BTU per hour on the highest (coldest) settings, depending on the model. The lowest setting (higher lower temperature) is often one half to two thirds of the highest consumption or stated BTU rating. The service manual should provide the lower BTU rating. The highest consumption rate or rating, is recorded on a plate at the bottom of the front door, or in the back lower portion near the burner. One pound of propane contains 22,000 BTU, and there are 4.2 pounds of propane per gallon. Divide 22,000 by the BTU rating to determine the number of pounds of propane used in one hour, then multiply by 24 hours to determine the amount used per day.Continue reading“Propane and Compressor Refrigerators, by Tunnel Rabbit”