Five MPPTs and a 1.5 DC/AC Ratio: Sizing PV Arrays for a 50–60kW Three-Phase String Inverter

Engineering guide for sizing PV arrays on GKOI NEWRGY’s SN50PT (50kW) and SN60PT (60kW) three-phase string inverters. Using only official datasheet values, it shows why the recommended maximum PV power implies a 1.5 DC/AC ratio, how to assign roof sections across five MPPTs (10 inputs), how to keep cold Voc under 1,100V and hot Vmp inside the 520–850V full-power window, and how to respect 32A/40A operating and 50A short-circuit limits per MPPT — including extra current margin for bifacial modules. Protection features for tenders (IP66, C5, Type II SPD, AFCI, PID recovery) are listed. Source: https://www.gkoisolar.com/product/three-phase-pv-inverter-5-mppts/ — Website: https://gkoisolar.com