Compressor Model Refrigerator / Freezers
I thought I'd start a new thread on this subject matter for those that will follow in the future. As I mentioned in another thread I'm planning on installing a compressor model refrigerator and fre...
Forum Discussion
There is a zillion factors in how much battery power a fridge is going to consume. Ambient temps, heat load placed within, quality of the insulation and seals, quality of the condenser ventilation, how fast the manufacturer decided to run the Danfoss compressor and how well it performs with the evaporator plate the manufacturer decided upon and perhaps another 2 dozen factors.
I gave you the absolute minimum amp draw of a Danfoss BD35f driven at the slowest compressor speed possible of 2000 rpm on a very small fridge. No resistor on the T stat circuit, extra insulation, and a condenser which sees nothing but the coolest possible ambient air temperature, ever. I've seen it use less than 7 A/H per 24 hours with few door openings in low 50's ambients, and I have also seen it consume 36 A/h in 24 hours when I loaded it with warm beer on a hot day and cranked it up to 75%. Unfortunately I forgot to lower it that night and had beer sickles the next day.
I never said this is what your dual 7.5 cubic foot fridges are going to consume. I have no idea how you are going to use them, what temperatures you are going to be in, or what temps you are going to expect internally nor how often you will be opening them, how long you will leave the doors open while you scratch your chin or how often you will be placing warm items within or how warm those items might be. These are huge variables.
YOu sound like you are sizing your solar array with a big buffer. Get the fridges you desire, and you can then tell us how much they consume when running and you can keep a log of the duty cycle, or get an amp hour counter but nobody here is going to be able to give you an exact consumption figure with 2 dozen unknown variables.
I've done nearly everything I possibly can to make sure mine runs as efficiently as possible, and I am thoroughly impressed with the performance, especially compared to the Sawafuji powered Norcold I had previous.
Since my fridge is so small and the BD35f could handle a much larger fridge at higher compressor speeds. I have no worries.
I can also return the resistor to the T stat circuit easily:
I gave you the absolute minimum amp draw of a Danfoss BD35f driven at the slowest compressor speed possible of 2000 rpm on a very small fridge. No resistor on the T stat circuit, extra insulation, and a condenser which sees nothing but the coolest possible ambient air temperature, ever. I've seen it use less than 7 A/H per 24 hours with few door openings in low 50's ambients, and I have also seen it consume 36 A/h in 24 hours when I loaded it with warm beer on a hot day and cranked it up to 75%. Unfortunately I forgot to lower it that night and had beer sickles the next day.
I never said this is what your dual 7.5 cubic foot fridges are going to consume. I have no idea how you are going to use them, what temperatures you are going to be in, or what temps you are going to expect internally nor how often you will be opening them, how long you will leave the doors open while you scratch your chin or how often you will be placing warm items within or how warm those items might be. These are huge variables.
YOu sound like you are sizing your solar array with a big buffer. Get the fridges you desire, and you can then tell us how much they consume when running and you can keep a log of the duty cycle, or get an amp hour counter but nobody here is going to be able to give you an exact consumption figure with 2 dozen unknown variables.
I've done nearly everything I possibly can to make sure mine runs as efficiently as possible, and I am thoroughly impressed with the performance, especially compared to the Sawafuji powered Norcold I had previous.
Since my fridge is so small and the BD35f could handle a much larger fridge at higher compressor speeds. I have no worries.
I can also return the resistor to the T stat circuit easily:
