A PV module IV curve (current–voltage curve) is a graphical representation of the electrical behaviour of a photovoltaic module under illumination. More than a theoretical plot, the IV (current-voltage) curve reveals how current and voltage interact — and whether measured output reflects. Thus, the IV curve diagnostic function is developed and now applying on our on-grid inverter X1-MINI G4, X1-BOOST G4, X3-MEGA G2 and X3-FORTH. The IV curve has voltage on the horizontal axis and current on the vertical axis, the maximum value on the horizontal axis is the open circuit voltage and. The results confirm that Huawei-developed Smart I-V Curve Diagnosis technology reaches Level 4 (L4 for short), according to the CGC/GF 180:2020 "Technical Specifications for PV String I-V Scanning and Smart Diagnosis Evaluation" and IEC 62446-1: 2016 "Photovoltaic (PV) systems - Part 1: Grid. Smart I-V Curve Diagnosis is able to carry out online I-V curve analysis on entire strings with advanced diagnosis algorithm. The scanning would help to find out and identify the strings with low performance or faults, which would help to achieve proactive maintenance, higher O&M efficiency and. Sunny Tripower CORE1 (STP 33/50/62-US-41) inverters provide a diagnostic function to measure the current and voltage characteristics (I-V characteristic curve) of the connected PV array strings. The. derperformance in PV systems.
