Note: Owing to an additional DC coupled inverter on string 2 (to boost peak load capability of the Hybrid) – output shown for this string may not necessarily reflect the true output.
While this inverter is charging, output will show as lower. Likewise when discharging, output will be higher than “true” PV output.
Generally however it should be assumed that the true output of string 2 is the same as string 1 (given they are identical.)
Also, as this portion of the system is DC coupled & cannot be charged from AC, the total amount of this “stored” PV will generally lag (over a few days) but eventually balance out in the total PV generated today / to date figures once fully discharged.

It should also be noted that this strings unique setup
allows it to show as PV generation even in complete darkness!