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Cell voltage. The standard electrical potential of a cell can be determined by the use of a standard potential table for the two half cells involved. The first step is to identify the two metals reacting in the cell. Then one looks up the standard electrode potential, E0, in volts, for each of the two half reactions.
Also shown are the cell short-circuit current (I sc) and open-circuit voltage (V oc) points, as well as the maximum power point (V mp, I mp). Click on the graph to see how the curve changes for a cell with low FF. At both of the operating points corresponding to I SC and V OC, the power from the solar cell is zero. The fill factorâ(FF) is the parameter which, in conjunction with V oc and I sc, determines the maximum power from a solar cell.