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ana asked Five solar cell batteries power a instrumentation system at the South Pole. Times to failure for each battery?
Five solar cell batteries power a instrumentation system at the South Pole. Times to failure for each battery are Weibull with shape parameter =1.3, and characteristic life (scale parameter)=2500 hours. Only one cell is required to keep the instrument running.The instrumentation system is unreachable after May 1 until Oct 1 due to the cold and weather. If the batteries are all replaced on May 1st, and cell failures are independent, what is the probability the instrumenta tion system will survive until Oct 1?
And got the following answer:
I think the question is flawed. Solar cells produce negligible electricity for 6 months from March 21 to Septmber 21 at the South pole. Significant energy is produced 5 months or less, depending altitude above sea level, even if each of the 5 solar panels are turned continuously to face the Sun.