Background:
A PV plant reports that the year, month, and day energy yields of the inverter
are missing on the SmartLogger browser. Devices are connected to the grid
properly, but performance data cannot be collected. The following figure shows
the symptom.
Problem analysis:
1. The SUN2000 is not running properly. (The SUN2000 is connected to the grid locally.)
2. The SmartLogger communicates with the third-party vendor, and the time is inconsistent with the third-party time. As a result, data is abnormal.
Exported inverter and SmartLogger logs. According to analysis, the SmartLogger frequently adjusts its time, resulting in abnormal energy yield. The analysis is as follows:
Solution:
Disable the IEC104 time calibration function and change the clock source to IEC104 on the time setting page.
