flboy wrote: I have a 4.3 CU ft. Magic Chef and it uses less than about 60W to include inverter losses when running. A 12vdc compressor will save the power conversion losses, so a little more efficient. Not sure it is enough of a gain to pay the premium for (dorm fridge cost $125 vs $600+ for DC fridge).
bdosborn wrote:flboy wrote: I have a 4.3 CU ft. Magic Chef and it uses less than about 60W to include inverter losses when running. A 12vdc compressor will save the power conversion losses, so a little more efficient. Not sure it is enough of a gain to pay the premium for (dorm fridge cost $125 vs $600+ for DC fridge).
I measured the electrical usage of my CF-40 and it's more efficient than you might guess, using about 0.5 amp-hrs:
Note that the duty cycle is 12% and it draws 4 amps (48 watts). My TV/Kodi box set up uses way more energy at 3.3 amp-hrs.
Bruce
P.S. Outside and interior temperatures make a big difference in energy use. I think it was in the 75-80F range in my garage. It goes up a lot (probably doubles) if its 90-100F out. But that's usually during the day when the PV panels are in production.
flboy wrote: Is that chart showing about 11.1 aH total over 24 hrs? Assuming I am reading it correctly and the CF40 is about 1.3 CU Ft (37 liters), it appears to work out the same or close enough to the same given the size/capacity allowance given the 4.3 cu ft. @ ~ 30-40 aH over 24 hours? Those little dorm fridges are very efficient.... not ruggedized however. Need to be mounted securely indoors and out of the weather.
BTW.. nice data acquisition and charting. What equipment are you using?
tony.latham wrote:You get some good advice on this forum, but when it comes to electricity --and Bruce aka bdosborn is chiming in-- it's time to listen and pick his brain.
Tony
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