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Sunsynk 12kWh 3-phase Inverter F18: HW_Ac_OverCurr_Fault


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Good morning

My system has been working as expected since installation for the last 6 months. On Friday afternoon the system switched off and restarted immediately with the abovementioned error.

I don't know why. The load was not excessive. The PV input voltage spiked to 578V. However, the rated input voltage for the inverter is 160V - 800V. See pic below.



Any ideas why? I have the following pics of when the event took place:



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