Looking at their PDF download for the two sizes of the unit tells a lot. The larger 225 model has a total cubic footprint of 24.5 cu.ft. for a interior
box size of 2.0 cu.ft. That means these things are really insulated. As another has said above, insulation is the answer to any refrig/freezer unit. I would say it is 90% of the answer.
- - Vacuum panels
have the best "R" per inch and also the highest cost per "R". Using different insulation materials the efficiency drops as the price
drops. Manufacturing format of the insulation is another major determinant as to "R" efficiency. Well manufactured flat panels
with foil sheathing is the next best below Vacuum panels and "out of the can" or other liquid expandable foams being at the bottom of the "R" value list due to their very inconsistent density.
- - PV power sources seem to be touted using the totally unrealistic idea that the sun shines at maximum 24 hours per day and the sun never varies from its zenith position. In reality zenith +/- 2 hours with a panel orientated perpendicular to the sun is the only time you get those rated wattage output. The rest of the daylight period panel output drops radically especially with panels that are fixed and cannot "track" the sun. Like bilge pump
rated output, PV panel tech specs are highly misleading.
- - But as to these refrig/freezer units you have to read the tech PDF sheet to get the "rest of the story."
- - P.S. looking at the energy consumption
chart just above shows 75 amp hours per day for the freezer when used in the Tropics. That's about average for the various other freezer configurations for a 2 cu.ft. freezer. And 32 amp hours for the refrigerator
alone. So for two units - freezer 2 cu.ft. and refrigerator
2 cu.ft. that adds up to 107 amp hours per day. Again about average for the various different units available on the market.
- - What is the major problem with this unit when bringing it into the cruising boat
world is its size/shape. Most of our installations are long and narrow, really narrow along the side wall of the curved hull
. This is why most units are custom built into the boat
versus using "drop in" units. And air circulation for the condensor plates is a major limiting factor. But if the thing would fit into your boat considering the above - it would sure be nicer than having to do weeks of construction to build your own.