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BMS to inverter issue

Richard Ashley
in Batteries

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I have two Volta 10kWh batteries connected to a Deye 12kW inverter. One of the batteries is showing only 2 green lights of charge, the other 4 green lights. The inverter states 80% SOC . I tried switching off the fully charged battery and had an inverter error saying battery over charge on the 2 bar battery. I checked the logger and there was no BMS data except for 100% SOC. It would appear the second battery is not communicating with the inverter. Is this an installation mistake, or is it normal for one battery to dominate?

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