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This paper presents the performance analysis of a photovoltaic cell derived from a single diode equivalent circuit under the influence of several kinds of electrical and environmental parameters. The characteristics of a solar cell have been investigated using MATLAB simulation and have been validated experimentally. In this paper the photovoltaic cell is represented by an exact equivalent circuit including all parameters such as a diode saturation current, light generated current, temperature effects, series and shunt resistance values. Also, this paper includes the impacts of clouds, dust, chalk powder, fly ash and bird droppings on the efficiency of the photovoltaic panel. A comparison between the experimental and model simulation results confirmed the reality of results, and indicate the validity of the exact model for photovoltaic performance analysis.

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