Waeco Fridge Draw on Battery

Submitted: Wednesday, Feb 22, 2006 at 18:11
ThreadID: 31045 Views:13848 Replies:8 FollowUps:24
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I am looking at upgading the factory issue battery in my Nissan 4WD to a deep cycle battery (120 amp hours) with cranking capability. With this, I then intend to run my Waeco compressor fridge, with the aim of getting more hours of operation on the fridge (when the vehicle is not running) than I would with a standard battery. Experience with the standard battery is that I get 6-8 hours of operation only, and I am hoping that the upgrade may give me significantly more.

I have to set the cut out switch on the fridge to 11 volts, which will cause the fridge to automatically shut down when the battery reaches 11 volts (I need at least this voltage to be able to start the car). So the question I have is as follows.....

The fridge draws 1 amp per hour, so if I set the cut out on the fridge at 11 volts, how many hours of operation am I likely to get from the fridge before it cuts out. During this period of operation, the vehicle will not be running and therefore the battery will be receiving no to up charge.
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