A method for obtaining the optimum gridline spacing for photovoltaic cells operating at high solar fluxes is presented. Using a distributed resistance and diode model of a photovoltaic cell, a differential equation is obtained which relates voltage to position on the cell surface. This equation was solved numerically to obtain the maximum power point efficiency. The maximum power point efficiency is shown to depend upon five dimensionless groups which are combinations of basic cell parameters, geometric parameters, and the solar flux level. The results are presented in graphical form from which the optimum gridline spacing can be obtained for any desired incident solar flux. In addition, the variation in the performance of any specified cell can be obtained from the graphs as a function of the solar flux level.

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