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Pylontech only dischages master battery, US3000/US3000C

Ddeclercq
in Batteries

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I added 1 US3000C battery to an existing pack of 2 x US3000 batteries today. Charged up all the batteries to 100% , made the new US3000C the master and all looked good. BMS reported proper discharge/charge rates to my Goodwe 5048ES inverter. BMS communicatoin showed as good. However when discharging the batteries it only discharged the master, even though the BMS reported SOC for the whole pack. At 65% SOC I lost power and it turned out it was because the new US3000C discharged all the way to 2%, the other 2 batteries was still at 100% SOC. Any suggestions on why this is happening or how I could fix it would be greatly appreciated

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