
Ok, I think that the devil is in the details on this one, but in general chest freezers as
refrigerators (with mods) are hands down more efficient compared to upright refrigerators. Chest refrigerators (which generally have less insulation than chest freezers) are a little better than many upright refrigerators, but apples to apples, right? The Sunstar refrigerator linked by
@ArlyA above is way, way more efficient than pretty much any other upright refrigerator. The other thing that I notice about chest refrigerators, is in my experience, organization is hard, and getting to lower layers is not so easy, so more cu. ft. of chest refrigerator really, really helps the accessibility to food in a chest refrigerator (I.e. basically 1/3 or 1/2 full). So, what's the apple to apple comparison? Same volume of refrigerator or same volume of accessible food?
Plus for those folks with motion issues, vertigo, bad backs, etc. any possible gain in electrical power efficiency for a chest refrigerator comes at a rather large personal cost, right?
All the best,
Peter