I would like to investigate the influence of cell mismatch on the overall IV curve of the module. Such an approach has been published by several authors - Quaschning 1996, Petrone 2006 and Ghani 2012. However I am finding it difficult to follow the methodology and do not have much experience in Matlab. Is there any existing functions or routines that are able to solve such a problem?

To summarize, the approach consists of: 1. Forming a vector of unknown subvoltages, 2. Creation of a Jacobian matrix which contains the derivative of the Lambert function with respect to cell voltage. (This Lambert function allows the irradiance and temperature of individual cells to be taken into account) 3. The matrix is then solved using a Newton Raphson approach, returning a solution vector with the unknown subvoltages and the current. 4. The IV curve is generated by increasing the terminal voltage and plotting the resulting current.