Abstract
A method is presented to select the optimum tilt angle, photovoltaic array area and battery storage capacity of stand-alone photovoltaic systems. This method uses monthly average meteorological data and easily acquirable system parameters in order to determine possible photovoltaic system sizes, capable of supplying any given monthly average hourly load profile. The optimum system selected is that with the minimum life-cycle cost while ensuring a desired reliability level. In the life-cycle cost computations a battery-life model has been used to determine the number of battery bank replacements. The reliability criterion used is the loss-of-energy probability. The method can be implemented on a personal computer and is applied to an illustrative example, where the optimum system size proposed by this methodology is compared with that of a newly installed system on a Greek island.
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