OND file missed VmppNom

[ynesse]

Hello pvsyst community , 

I want ask why manufacturer don't specify sometimes VmppNom in ond files ?? and why pvsyst consider that vmppnom is a weak condition ?? because what I know that VmppNom is an important parameter to calculate P_ac inverter , thanks in adavance

[Lazare Fesnien]

Dear Ynesse, 

VmppNom: Nominal MPP voltage is sometimes specified by the manufacturer.

In this case this may be an indication for the optimal number of modules in series.

Weakly used in the sizing tool in the present time