Well, I think I can see why that particular installation
might have excessive cycling times. Vertical, front-opening boxes are *renowned* for being less efficient for the same volume than a chest-type, top-opening fridge-freezer.
Here's why: every time you open the door, all the cold air falls out (being denser than warmer air outside) and so compressor
has to cycle frantically to replace lost
The more often you open the door, the worse the power consumption
So a "test" on such a fridge ought to feature several "open / close" events
to better replicate *actual* usage.
Where 12V is concerned, chest type fridges are a no brainer. BUt they can be useful in domestic environments as well.
Of course, if you have the acreage for solar
, or the space to mount a large batt bank, or don't mind running your engine/generator to recharge said bank, then by all means go with "front-opening convenience".
Anyone who has such a fridge is further advised to keep it full (with bottles of water
taking up spaces) so as to A) reduce the volume of air that drops to the floor every time the fridge is opened, and B) provide a heat sink to soak up the warmth of the air that rushes in to replace it.
This is 'Refrigeration 101'.
It's also why domestic fridge makers now utilise plastic boxes on drawer slides for freezer
compartments, as this reduces the compressor
cycling time and thus enables them to claim a more "green" operation cycle and increase the number of 'stars' on their efficiency labelling (such as we have here in Oz).