When it comes to using superposition, follow these steps; 1) "cover-up" or "remove" one source from the circuit, 2) analyze the individual response of the elements from the remaining power source (voltage, current, etc. ), 3) repeat the process but cover up the other source .
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Solar cell parameters gained from every I-V curve include the short circuit current, Isc, the open circuit voltage, Voc, the current Imax and voltage Vmax at the maximum power point Pmax, the fill factor (FF), and the power conversion efficiency of the cell, η [2–6].
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