[Maximum Efficiency of a PV module]

I think one answer would be Pmax=Voc*Isc but I am not sure.

[Maximum Efficiency of a PV module]

The more incident irradiation on the Pv module the more the produced energy, which is correct to a certain extent(attached figure).

I would like to ask what is the limit of a PV cell's production? Namely, what is the maximum instantaneous power output of the PV cell regardless the irradiation.