How many ratios that the PVSyst allow for simulation

[PVSiam]

I got a problem with a simulation that has shown "The inverter power is strongly oversized" I need to know how many percentages of DC/AC ratio that PVsyst allowed to do simulation. I have used SolarEdge Inverter 27.6K and 540Wp PV module x (DC/AC ratio =66.5%) but why PVsyst still show "The inverter power is strongly oversized"

[dtarin]

You can set this in hidden parameters to allow a lower DC/AC ratio.