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Strange Frequency Spikes in grid input on inverter - GROWATT

Solar388

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Feb 8, 2022
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I have the Solar Assistant software now running on my Growatt. I am trying to figure out why this 12K inverter shuts down at 10500 watt loads. I think some of it is my battery settings so I have been refining those based on hours and hours of reading on here.

However in one of the graphs in the last hour, there was some strange frequency spikes in the grid input of the inverter. It happened also about 3 hours before these 2 events that are very close to each other. The lights in the house dimmed slightly at the same time of the event. All 3 events are 133HZ .. Did my grid provider cause this or did my inverter somehow cause this?


I just added a 2nd picture. The voltage on the output of the inverter dropped to 220V from the consistent 240V it is set at, but even it goes to 250V many times which is my input grid voltage

@RichardfromSignatureSolar any thoughts on this? Is a better indication there is something wrong with this 12K inverter in the transformer ?


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