[bestgenman]

The answer is YES, you can add chargers.  I added a PowerMax PM3-120LK to the lithium bank for faster charging.  It is adds an extra 100A and cuts the elapsed time down.  As the battery voltage comes up, the ampere rate declines so don’t expect 120 from the Victron and another 120 from the PM.  Generally, the charger rate at adsorption, is 120A total whereas it would be considerably lower with just the Victron inverter/charger.