There are regularly large drops in power throughout the day. PV current drops, but PV voltage remains high. Confirmed by video recording that there are no clouds. Specifically at 3:27PM when power dropped the most.
The power loss is weakly correlated with derating mode 4 (Fac) and derating mode 20 (not documented?). Inverter temps are getting well into the 60C+ but it's less correlated and I don't see any derating mode 5 or 6 (Tinv, Tboost) in the logs. Similarly, weak correlation with AFCI strength/status.
Any ideas for how to debug this? I may try another GRID setting such as IEEE (currently Rule 21), or disabling frequency derating. I may install Solar Assistant in search of more information.
![Screenshot 2024-06-22 at 7.29.09 AM.png Screenshot 2024-06-22 at 7.29.09 AM.png](https://diysolarforum.com/data/attachments/223/223808-80e7aef50aba3fe8e70681c95e9e4d9c.jpg)
![Screenshot 2024-06-22 at 7.29.16 AM.png Screenshot 2024-06-22 at 7.29.16 AM.png](https://diysolarforum.com/data/attachments/223/223807-c78cb968cf6b8336fcc2ab6de54b1541.jpg)
![Screenshot 2024-06-22 at 7.49.40 AM.png Screenshot 2024-06-22 at 7.49.40 AM.png](https://diysolarforum.com/data/attachments/223/223818-dbf630768492deddc6cbb194a9ee8445.jpg)
![Screenshot 2024-06-22 at 7.49.57 AM.png Screenshot 2024-06-22 at 7.49.57 AM.png](https://diysolarforum.com/data/attachments/223/223816-4bc88edd1210cb2adcb280669b6c6e86.jpg)
The power loss is weakly correlated with derating mode 4 (Fac) and derating mode 20 (not documented?). Inverter temps are getting well into the 60C+ but it's less correlated and I don't see any derating mode 5 or 6 (Tinv, Tboost) in the logs. Similarly, weak correlation with AFCI strength/status.
Any ideas for how to debug this? I may try another GRID setting such as IEEE (currently Rule 21), or disabling frequency derating. I may install Solar Assistant in search of more information.
![Screenshot 2024-06-22 at 7.29.09 AM.png Screenshot 2024-06-22 at 7.29.09 AM.png](https://diysolarforum.com/data/attachments/223/223808-80e7aef50aba3fe8e70681c95e9e4d9c.jpg)
![Screenshot 2024-06-22 at 7.29.16 AM.png Screenshot 2024-06-22 at 7.29.16 AM.png](https://diysolarforum.com/data/attachments/223/223807-c78cb968cf6b8336fcc2ab6de54b1541.jpg)
![Screenshot 2024-06-22 at 7.49.40 AM.png Screenshot 2024-06-22 at 7.49.40 AM.png](https://diysolarforum.com/data/attachments/223/223818-dbf630768492deddc6cbb194a9ee8445.jpg)
![Screenshot 2024-06-22 at 7.49.57 AM.png Screenshot 2024-06-22 at 7.49.57 AM.png](https://diysolarforum.com/data/attachments/223/223816-4bc88edd1210cb2adcb280669b6c6e86.jpg)