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I am wondering how the fault code 16 after connecting AC input into both inverters in a parallel split phase operation. I have exactly confirmed the wire connection and the communication connection with double D-sub 9 connecting cables. Although the fault code 16 means that "Input phase is not correct", the AC input L1, L2 and neutral line is connected exactly to each inverter from the grid.

Therefore, I think that the firmware in my inverters may be affecting to this issue. The version of the firmware is 04 701 in each inverter. Dose anybody know where I can get the newest firmware?

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