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Communication between Axpert 7.2 MAX and Pylontech Battery (error 61 - BMS)

I have an AXPERT 7.2 MAX inverter and two Pylontech Batteries. One US2000C and one US2000. I’ve set the US2000C as the master but on the inverter I get the 61 error code (BMS Communication). The Cable is good but I don’t know the configuration if it’s good or how it should be made for the batteries to work properly. When I had just one battery (the US2000) everything worked fine. Appreciate any assistance.

BMS
2 |3000

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