Wednesday, Feb 17, 2010 at 19:03
Pete, I did not criticise either of you fine gentlemen, my question, yes, it was a question, see the *?* at the end of the sentence, was:
"Wondering how you two guys calculate the 2,1OO Watts ? "
Pete, as Boobook states, a 3 way fridge does not have any 'off' period on 12 Volts, so it is being powered 24/7 by the battery system, sorry but your "rough calculation" of 400 Watts is therefore not relevant at all.
To generate the 432 ah required in a day, with say 7 sun hours, that is 62 Amps per hour over the 7 hours you need to place charge into the batteries.
The Time (7 hours) can be verified on this Australian Bureau of Meteorology map:
*Average daily* SUN hours, there is no area in Australia, or even Tassie, that has only 4 Sun hours, as can clearly be seen most of Australia has 8 or 9 sun hours, so 7 hours is realistic.
Using your "19v" my calculations are; 62 Amps x 19 Volts =1,178 Watts, but where in hell do you put all of them panels, and they just run one fridge?
Maîneÿ . . .
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