Forum Discussion
Almot
Mar 15, 2014Explorer III
In defense of Danfoss technical writers:
The title "BD 35" with a 9 cu.ft box is nonsense, and so is +200 AH daily draw with 3A compressor. But...
It has just crossed my mind why the numbers on that graph look so overstated even within maximum possible 72 AH draw for 3A compressor (or max 120 AH for 5A compressor).
The graph is for "average boxes". Which means - I guess - average build-in box how it came from the factory. Which means - with thin 1"-1.5" insulation. OTH, users installing 12V fridges/freezers are energy-conscious, and always add insulation. According to Backwoods Solar, added 3" block foam insulation around single-door Novakool combo units cuts energy consumption in half. In half or not, but it does cut it. Which explains why all the reported numbers are lower than that Danfoss graph.
The title "BD 35" with a 9 cu.ft box is nonsense, and so is +200 AH daily draw with 3A compressor. But...
It has just crossed my mind why the numbers on that graph look so overstated even within maximum possible 72 AH draw for 3A compressor (or max 120 AH for 5A compressor).
The graph is for "average boxes". Which means - I guess - average build-in box how it came from the factory. Which means - with thin 1"-1.5" insulation. OTH, users installing 12V fridges/freezers are energy-conscious, and always add insulation. According to Backwoods Solar, added 3" block foam insulation around single-door Novakool combo units cuts energy consumption in half. In half or not, but it does cut it. Which explains why all the reported numbers are lower than that Danfoss graph.
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