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Why does my system favour mains over battery - When Battery is at high SOC

I'm tearing my hair out - My Multiplus is connected to an MPPS and 300ah battery stack. In the past few months the system is still taking power from mains when there is up to 100% SOC and plenty of sunlight. I do have some AC ignore rules, but these haven't changed since I first set it up. If I reset the Multi everything returns to normal - The system resumes pulling from the batteries and/or the solar. After about 12 hours it reverts to pulling, unnecessarily from mains.

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I would say it's needed more information.

1.Your particular AC ignore rules; 2.Multi settings; 3.MPPT settings

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