Hi Victron: As a suggestion, to assist with the recovery of lithium cells at low voltage, would it be possible for future models of the MPPT 75/10 and 75/20 to have restricted current output at Battery voltage below the minimum threshold setpoint? being able to restrict the output current to <1A would assist with the proper recovery of a deeply discharged battery, this threshold could be the same as the load output cut off voltage, or 50 - 100mV below.