Mp2 - 24/3000/70 - charger

Good evening everyone, I finally mounted my mp2.
after connecting it to the network via Cerbo GX, I installed the drivers for recognizing the JK BMS on the Cerbo and thus using the percentage of charge taken directly from the JK BMS. However, I have a problem: for the first charge I set the MP2 charger with 29.2V for both absorption and maintenance. then I will set the default values ​​for subsequent loads. Why do you think the charger doesn’t go beyond 60% charge despite the voltage being 27.26V?