Fdez. de Arevalo

Hi Jose, I understand that -18°C is too low as min. temp. considering that in this situation the panels are producing the nominal power. It is the absolut minimum Temperature in a hourly TMY in northern Europe. We cannot set the same minimum temperature everywhere. About this topic I have only seen this paper "Dimensionado del nº máximo de módulos en serie según criterio de tensión máxima" and there is no database for this value for every location. Has anyone a criteria for this minimum Temperature which shouldn't be the absolute minimum Temperature? A percentage? We cannot make a whole study as in Paper for every location. For being conservative and for having an argumentation I should use the absolute minimum temperature if I don't have a more accurate criteria. Looking forward to having new ideas! BR Luis

Hello team, I´m using PVsyst 6.75 and I tried to change the minimum temperature for open circuit voltage of array from -10°C to -18°C what is more realistic in northeuropean countries but it remains Voc(-10°C). I tried to do it in Preferences/Edit hidden parameters/Category:system design parameters/Minimum temperature for Inverter VAbsMax design. Then I checked it in the desing of the array und it didn´t change niether the minimum temperature nor the limitation of Voc. I think I have done it right. Has anyone else this problem or am I doing sth wrong? Few years ago I could do it but not with this version. Thank you for your help. Best regards, Luis