Hello.
Since firmware 2.57, not all MPPT charge controllers connected via USB can be found. I have connected 4 MPPT charge controllers. 2 x USB, directly on the Cerbo GX. 2 x via USB hub. Firmware 2.57 detects 1-2 charge controllers. When downgrading to 2.54, all charge controllers are found. 2 additional charge controllers are connected via VE.Direct and are always found.
Thanks
Paul