No. of modules in series

[rraja]

Can't able to keep 20 and above Modules in series in PVsyst 6.6.3.

But it was supported in the older versions.

Suggest to solve this.

[praveenksadh]

There may be possibility that in older version "Lower temperature for Absolute Voltage Limit" set @ 0°C however as per attachment "PV Syst" Set temp. is -10°C resulting 1020V which is exceeding inverter maximum input voltage and not allow to take 20modules in series due to same.

Hence go to Project → Project Setting → Design Conditions and set the "Lower temperature for Absolute Voltage Limit" value as weather file.

Also find below details.