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No. I can't access the BMS on batteries. But battery support team came few days back and checked it. No issues were found on BMS.

#19 - 57.6V #20 - 56.5V

No winter here. I am in sri lanka. (sunny whole year) Normaly peak time it should go around 3800 - 4000 W.

Yes. Factory reset. And firmware updated as well. No luck so far.

80A

Checked every setting. No issues at all. I have been using this almost 10 months now. Charging limits at 2000w and fluctuate the V or A according to that. As an example normaly 320v coming from the panels with 13a (peak time) Its fluctuates to 160v when peak time now.

My setup 540w x 8 panels (series) LiFePO4 51.2v / 100a x 2 (parallel) I recently noticed that charging current limit at 20A (2000W) (even from grid charging) should be more than 50A normaly. I have tried everything including US2 settings. Replacing MPPT and Main board. Updating latest firmware...