WDC

Hello, I noticed a error when using Huawei 30/40/50KTL-M3 with MERC-1100W-P optimizers. According to the MERC-1100W-P manual, the maximum power of an optimizer string is 20kWc. In my configuration I have a Huawei 30KTL-M3 with 2 strings of 36 450Wc panels (18kWc per string), which should be accepted by PVSyst but I got this error. How can I overstep this PNom ratio limit ? Thank you in advance, Best regards