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    Battery charging issue

    This is the 2nd time charging my 52v diy battery and when the voltage reaches 56.5v the charger shuts off. I am using an advanced 300w luna charger. I’m attempting to charge to 100% for the first 5 charges. I verified the battery and charger voltage via multimeter. Battery-56.5v Charger output-58.8v. I’m wondering if this could be a bms issue, battery, or charger issue. When switching through % options on the charger, they all output 58.8v. All cells seem fine and show similar voltage, no outliers. I understand the BMS will shut off if a cell reaches 4.2v before other cells but no cells were over 4.07v right after charge.
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