Apex 300 SOC Won't Stabilize

I have an Apex 300 that I bought 2 months ago.

Issue - SOC consistently jumps from 60% to 100% on charge. This has happened since first owning the unit.

This is after calibration:

This was the SOC action before I did the “calibration”:

  • I charge only off solar

  • I have done the full discharge and recharge with the same SOC issues (calibration)

  • I am on the most recent firmware
    IOT V8026.13
    ARM V2204.13
    DSP 2174.16
    BMS V1073.07

Thank you for any help!