I'm breaking my current "pseudo 12 volt fridge" discussion to this new thread from my build log (
ViaVacavi Build Log )
The purpose of this thread is to discuss DIY fridge conversions, essentially converting inexpensive and readily available mini refrigerators designed for 120 VAC use, to run off of our 12 VDC electrical systems as efficiently as possible. I would also like to gather information on energy use of popular 12 volt fridges for a comparison. I will detail cost breakdowns, energy use and efficiency and details to do your own conversion.
Why would someone want to convert a 120 volt fridge to run on 12 volt?
- Cost. Using all new high end parts, a converted fridge can be made for around 1/4 the cost of a similarly sized 12 volt fridge. Using used, free and cheaper parts, a converted fridge can easily be made for less than a tenth the cost of a true 12 volt fridge of similar size.
- Layout. Some people prefer a vertical layout vs. the standard "cooler" layout of most 12 volt fridges.
- Size. Many mini fridges are available in the 3 to 4 cubic foot range - this is equivalent to a 90 to 120 quart 12 volt fridge in size.
- Separate Freezer. There are many mini fridges with separate freezer compartments. Only a few 12 volt refrigerators have this option and they are at the high end of the price range.
To be fair, there are also some drawbacks:
- A "pseudo conversion" will nearly always be at least a little less efficient than a true 12 volt fridge.
- There is a bit of added complexity. There will be added components which could fail
- You must be at least a little familiar with wiring
- Nobody really knows anything about longevity or reliability, nor how well a converted fridge will stand up to life on the road.
Stay tuned!