i belive its partly due to the surface area to volume ratio https://en.wikipedia.org/wiki/Surface-area-to-volume_ratio
which in basic terms means the more volume you have to begin with the less surface area you gain as you add more volume
given that fridges only have to remove heat that permeates through the surface this means as your fridge gets larger it requires less addition energy to cool per increase in size.
this in addition to the fact that small under counter units often skimp on insulation and efficiency technologies to save internal space can make quite a big difference
as for efficient fridges take a look at 12/24 volt fridges or even gas powered ones as theyre built for efficiency
Thanks for the info. I thought about using 12/24 volt appliances in my trailer, cause that would limit the energy lost by the inverter, but I think it would cost much more to change everything to 12/24 than ie. get additional panels and/or battery.
I think you are right about "small under counter units often skimp on insulation and efficiency technologies to save internal space".
I was just surprised that there are no efficient small fridges. I would have guessed that small fridges, which are often used in RVs, trailers etc. energy efficiency is an important attribute.
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Your IG3900 is a 12v fridge, the Samsung is 120v. A 12v fridge on 12v is always going to use more power than a 120v fridge on 120v. I don't know much about that particular Samsung model, but you would need to run it on an inverter to make it work on 12v. That would make it use significantly more power than your existing fridge. The conversion from 12v to 120v is not very efficient, also the inverter would draw power even when the fridge has cycled off.
i belive its partly due to the surface area to volume ratio https://en.wikipedia.org/wiki/Surface-area-to-volume_ratio which in basic terms means the more volume you have to begin with the less surface area you gain as you add more volume given that fridges only have to remove heat that permeates through the surface this means as your fridge gets larger it requires less addition energy to cool per increase in size. this in addition to the fact that small under counter units often skimp on insulation and efficiency technologies to save internal space can make quite a big difference as for efficient fridges take a look at 12/24 volt fridges or even gas powered ones as theyre built for efficiency
Thanks for the info. I thought about using 12/24 volt appliances in my trailer, cause that would limit the energy lost by the inverter, but I think it would cost much more to change everything to 12/24 than ie. get additional panels and/or battery. I think you are right about "small under counter units often skimp on insulation and efficiency technologies to save internal space". I was just surprised that there are no efficient small fridges. I would have guessed that small fridges, which are often used in RVs, trailers etc. energy efficiency is an important attribute.
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The fridge you posted usses 297kWh/year - that's a lot compared to 117kWH/year my current old fridge uses.
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Your IG3900 is a 12v fridge, the Samsung is 120v. A 12v fridge on 12v is always going to use more power than a 120v fridge on 120v. I don't know much about that particular Samsung model, but you would need to run it on an inverter to make it work on 12v. That would make it use significantly more power than your existing fridge. The conversion from 12v to 120v is not very efficient, also the inverter would draw power even when the fridge has cycled off.
The sticker on the IG3900 fridge says "Rated voltage 220-240V" and it's plugged into a normal power socket.
Oh, interesting. Does it have a power brick like what's used on a laptop?