Fresh Questions, Practical Answers: PVsyst Q&A Series #4

The PVsyst version used for the following Q&A is version 6.66, and other versions can be referenced for guidance. 1. How to interpret the shadow animation trajectory on the PVsyst 3D simulation interface? How to simulate at a specific solar hour? [Teacher Chen's answer]: Currently, the simulation of 3D shadow animation in PVsyst versions 6.66 or 6.67 differs from previous versions, as there is no option to simulate according to "Solar time" or "Legal time". In the current version, the default setting is to simulate according to "Legal Time", which, in China, corresponds to Beijing time. As shown in Figure 1, a rectangular obstacle is placed about 1 meter away from the center of the front row of photovoltaic arrays. According to previous versions, if simulated according to solar time, the shadow curve would be symmetrical. However, it is not symmetrical under solar time. ▲Figure 1 According to the "Photovoltaic…

Fresh Questions, Practical Answers: PVsyst Q&A Series #3

1. There is a discrepancy between the photovoltaic plane radiation amount in the Report and the photovoltaic plane radiation amount in the Orientation. Why? [Answer from Teacher Chen]: As shown in Figure 1, the project site is in Hangzhou, and the source of meteorological data is Meteonorm7.1 software. The tilt angle for photovoltaic installation is 25°. In the Oritentation optimal tilt angle selection interface, the software itself only enables users to adjust the tilt and azimuth angles, facilitating a quick judgment of the optimal tilt and azimuth angles. However, the specific radiation values are approximate. As shown in Figure 3, the annual radiation amount is 1263kWh/m2. The radiation value obtained after simulation as shown in Figure 4 is an accurate value. As shown in the fourth column of Figure 4, the annual radiation amount is 1256.6kWh/m2, so this value should be used as the standard. ▲Figure 1 ▲Figure 2 2.…