I have 3 MP II 5000 in a 3 phase install. For 6 months no issues. From today the multiphase regulation is jumping up and down with 1kW.
Try to check that all battery and mains connections are secure and tight, particularly battery negatives and Mins neutrals.
Did the clue you got work? Any feedback?
Total powerdown of the complete system was needed. Meaning cerbo and MPII totally offline.
Thanks for replying, so a reboot for all components resolved the issue.
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