Why consider 12v fridge for boondocking?
So I want to offer up this question out about 12v compressor refrigerators. I'm going to post this on other forums too, so your "forum tramps"(like me)may see this spread around some other pages. Not...
Forum Discussion
ktmrfs wrote:StirCrazy wrote:
when it comes to power usage, a 12V is not near as energy efficient (battery power wise) as an adsorbition fridge. you will need much more battery capacity and solar or a generator if you switch to 12V compressor.
In terms of BTU or KWH needed to cool, compressor driven fridges are much more efficient than a absorption fridge. Generally you can get about 3x the input BTU used in cooling BTU from a compressor driven fridge. No it doesn't violate any laws of physics, it's the energy needed to move heat from one place to another.
By contrast an absoprtion fridge is much less efficient COP is on the order of 0.7 or less vs 3 or more for compressor fridges.
But in terms of how the energy is stored to use the fridge, propane in BTU/gallon or BTU/weight or BTU/volume FAR FAR FAR exceeds any battery for the same volume or weight.
if you looked I did preamble this in terms of power usage as in how much power is required of the batteries.. I understand the other side already but thats not the issue here. the issue is how much more it would cost in batteries solar panels or generator to boon dock with a 12V compressor fridge.
