Fresh Questions, Practical Answers: PVsyst Q&A Series #1

1. Question: After solar tracking, the curve of the PV Rack Model does not take 12 noon as the symmetry point. What is the reason? ▲Figure 1 As shown in the figure above, the tracking curve is traced with 1 pm as the symmetry point. This issue did not occur in previous versions before the update. [Answer from Teacher Chen]: The situation shown in Figure 1 occurs because the dynamic shadow simulation in the 3D modeling interface does not use Solar Time. PVsyst defaults to Legal Time. If Solar Time is used, as in the photovoltaic array shown in Figure 2, the shadow results will be symmetrical. However, it should be noted that if there are other obstacles near the photovoltaic array, the shadow results will generally not be symmetrical at 12 noon, regardless of whether the simulation is done using Solar Time or Legal Time. ▲Figure 2 2. Question:…