Fresh Questions, Practical Answers: PVsyst Q&A Series #8

Friendly Tip: The software version used in the following Q&A section is PVsyst 6.66 or 6.67. For other versions, please refer to them for reference. 1. Is the product of the loss ratios in the loss report graph equal to PR? [Teacher Chen]: The following Figure 1 is a loss diagram extracted from the report of a 20kW photovoltaic power generation system, with a PR value of 77.1%. For accuracy, the decimal point in the loss ratio has been adjusted from the default 1 to 3 digits. From the loss diagram, it can be seen that the total radiation on the photovoltaic plane is 5% higher than the horizontal total radiation. When calculating the PR based on actual values, this item cannot be included. As shown in Table 1, the actual calculated PR value is 97.51%*97.46%*97.00%*98.58%*94.36%*97.77%*100.48%*98.00%*98.90%*99.10%*97.70%*97.59%=77.1%. Therefore, it is basically consistent with the PR value simulated in the actual Report.…