Consideration of .PAN Parameters in Mixed Module Simulations

[Elise]

In the case that different PV modules (and unique .PAN files) are defined in Subarray 1 and Subarray 2, how does PVsyst consider the different temperature coefficients and low light performance of each module in the simulation? I can see one aggregated number in the results, but I am wondering how the calculation is performed and if the unique module / .PAN characteristics are both considered. 

 

Does the answer change if the mixed modules share an inverter?

 

 

 

[Linda Thoren]

The low light performance and temperature coefficient is defined in the individual .PAN files. The thermal parameters are then set for the full system to evaluate the temperature and the thermal losses in each sub-array. 

Thus if you are mixing panels in the same inverter (though in different sub-arrays), the different temperature coefficient of the different modules are well taken into account. In the loss diagram you will see the results for the full system. You find more information on the subject in the following PVsyst help pages:  

https://www.pvsyst.com/help/physical-models-used/pv-module-standard-one-diode-model/index.html?h=pv+module+standard+one+diode+model
https://www.pvsyst.com/help/project-design/array-and-system-losses/array-thermal-losses/index.html