Several methods are currently used to calculate the values of voltage, current, and power of a solar cell. A new method is suggested to numerically find these values using the popular methods Newton Raphson method (NRM) and the three-step method (TSM) at different values of load resistance R. Equation based on the equivalent circuit of a solar cell, so all calculations is performed in a MATLAB at room temperature. The obtained results of this new method were presented and compared with NRM. Additionally, a single diode model of a solar cell was demonstrated.

This paper deals with the extraction of the physical parameters of solar cells (a single diode model) from the equivalent circuit of the cell. The extraction is carried out by three different numerical methods with a comparison between them. The first and second methods are a difference of the Newton Raphson algorithm (NRM) and Aitken’s extrapolation algorithm (AEM), respectively. The roots of the nonlinear equation of this cell have been described and solved using the three methods. The proposed method is tested to solve the output voltage; current and power of this cell from the roots of this equation with the various values of load resistance RL.

Equivalent circuit model has been proposed to describe the solar cell characteristics and commonly used is single diode model. Sundry methods are currently utilized to determine the values of voltage, current, and power of a photovoltaic cell. A new method is suggested to numerically find these values using the popular methods, Newton Raphson method (NRM); Aitken’s extrapolation algorithm (AEM) and Three-step method (TSM) at various values of a load resistance R. Equation based on equivalent circuit of a solar cell so all determinations is imlemented in a Matlab in ambient temperature. The obtained results of this new method are given and contrasted with NRM.