Sunday, Sep 12, 2004 at 10:24
Hi Guys,
Thought I'd add my 2c worth!! I have been watching these various fridge debates for a while, and it doesn't take long to see who is throwing up a smokescreen, and confusing the issues with Bull#$#$!!!! 80L consumes 85A - how was that arrived at???
OK FACT, I have an 80L Evacool (yeah ok I already know is less than 80l due to compressor!) fitted to the Nissan with 2 x 40w Solar panels. Here are some FACTS - as measured and as confirmed (by use) on a trip through the GRR and Kimberleys!!
The Evacool (Danfoss BD35 compressor and controls) runs at approx 2.4amps in economy mode, and 3.5amps in boost mode (measured Metrix 52 DMM) The duty cycle on setting 1 (2 degrees celcius) at approx 36 degreees ambient, and packed in the back of the nissan is 20-30 minutes on per hour (take worst case as 50%) therefore in economy mode, equals 2.5A times 12hours (30 amphere hours!).
Solar array produces approx 24 - 36 amphours per day (measured at between 4 - 6 amps per hour at 13.0 v between 0900 - 1500, add some more if you want for the early/later times). Say lower figure of 25 amphere hour per day.
Battery used is a standard 55amphere hour capacity deep cycle.
Running it to 50% discharged (dmm (open cct voltage) = 12.25v and SG = 1190 (also where fridge turns off due low voltage) takes 5 days!!
therefore the fridge MUST only use 5 amphere hours a day MORE than the solar panels produce!! My calculations make that approx 30 ampere hours per day for the Evacool....that is NOWHERE near 85amps!!!!
For your comments..............
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