Exact analytical solutions of the parameters of real solar cells using Lambert W-function

Exact closed-form solution based on Lambert W-function are presented to express the transcendental current–voltage characteristic containing parasitic power consuming parameters like series and shunt resistances. The W-function expressions are derived using Maple software. Different parameters of solar cell are calculated using W-function method and compared with experimental data of Charles et al. for two solar cells (blue and grey). Percentage accuracy of W-function method is also calculated to prove the significance of the method.