As a rule of thumb, the maximum power point can be taken to be some fixed fraction of V. Check this by determining this fixed fraction for a Sunpower X-series photovoltaic cell for which Voc=0.710 V and I = 6.39A at one sun. Assume a series resistance of 6.7 m2, an infinite parallel resistance, and an ideality factor of unity. This problem is meant to be done numerically,
a) Determine the maximum power and fill factor for 11 = 6,39 A.
b) What is the fraction, V.../Voc where V. is the voltage at the maximum power point for 1 = 6,39 A and IA
c) Determine the fill factor for li = 6.39 A but without a series resistance.
d) Compare the two calculated fill factors using the approximation discussed in lecture (or on PVeducation. org).
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As a rule of thumb, the maximum power point can be taken to be some fixed fraction of V. Check this...
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