The VRM graph illustrates a perfect charging session for my 48V @ 450Ah LiFePO4 battery. The charging specs are constant current to a charge voltage of 56V, then constant voltage to 2% tail current or 6 minutes, whichever comes first.
The charging infrastructure is two SmartSolar 150/85 Tr VE.Can (r.2), each with a 3.5kWp array, connected to a Cerbo -s GX, with BMV-712 monitor. The LFP battery does not communicate its status, so DVCC is enabled for SVS and SCS. Tail current in the charge profile is set to 9A, Charged Detection Time 1 minute.
The SCCs track in perfect synchronization, thanks to DVCC, and with high precision.
Note the typical constant current charge phase until Absorb Voltage is reached. The constant voltage phase charge current rapidly declines to the Tail Current value, and charging is maintained for 1 minute further. The BMV-712 synchronized to 100% SoC at that point, and both SCCs switched to Float.
Total Absorb duration: 5 minutes.
I will be adding a third array of 4.1kWp connected to a SmartSolar 250/70 Tr VE.Can this month, and fully expect the precision charging delivered so far will continue.
