This can take up to 12 hours to complete.
The calibration (Autolearn mode) is a process whereby the controller records the battery discharge curve in order to know the battery autonomy, in addition to maximum and minimum voltages. It is split into three (3) steps:
Step 1: Begin calibration. The controller charges the BBU to maximum capacity.
Step 2: The controller discharges the BBU.
Step 3: The controller recharges the BBU. When maximum capacity is reached, the process is finished.
Note: If either Step 2 or Step 3 is interrupted, the learning process stops and will not restart.
It is not recommended to disable the "Learn Cycle" of the BBU as it will shorten the service life of the battery to one-third (approximately eight (8) months) of its original useful life of two (2) years.