Thank you for replay Update : When the grid power comes on and there's no sunlight, the inverter charges at 70 amps, as per the AC charging settings. But when the solar card is active and grid power arrives, the total charging current drops to only 20 amps. However, if I turn off the solar panel breaker, the charging current goes back up to 70 amps. Note: In both cases, the battery state of charge is between 60% and 70%. System specs: - Inverter: Triple A ( voltronic vm iii ) 4000 w - Battery: Marvel ML 280A 24V lithium - Connected to a BMS