Thin film modules: Fit on input values of Rshunt

This little tool allows for adjusting the exponential parameters, according to some known Rshunt values at different irradiances.

The Rshunt value can be obtained on the basis of measured I/V characteristics of the module. Rshunt is the inverse of the slope around V=0 (i.e. the short-circuit point at Isc).

If you have access to such data or measurements at different irradiances, you can add them to the plot. You can use the right button of the mouse for creating a new point, and then slide it to obtain the desired value. For deleting a point simply click on it with the right button.

The Fit button will then give the adjusted exponential parameter.

See also: Rshunt exponential correction vs Irradiance.