Thanks for all the replies. This is super helpful. Let me provide more details about my setup:
I bought the chargeverter to be able to use my 12,000W Duromax generator to charge my lithium batteries. It is obviously not an inverter generator so I need clean charging for my 280AH EG4 batteries. I also have a whole other setup that I started my solar adventure with. It is a Renogy Lycan 5000 Power box with 400AH of Renogy batteries. The Renogy batteries and the EG4 battery have different charging profiles so I cannot connect them. The Renogy batteries are 15 cell and require a max of 54V when charging. The EG4 requires 56.2V when charging (not sure how many cells). With the chargeverter, I can charge either battery pack separately by adjusting the charging voltage.
The Renogy setup is fully dedicated to running my koi pond pumps and the EG4 battery + EG46000XP runs everything else in my home except a heat pump and another 2 ton air conditioner unit which are both connected only to the grid. Since I don't really need the chargeverter to charge batteries while connected to the grid I decided it would be helpful to use it to provide additional charging for the 280AH batteries using the Renogy 400AH batteries when they are fully charged and solar has not been enough to fully charge the 280AH battery. I recognize the somewhat absurd process of converting solar to 54V then to 120V then back to 56.2V using this setup up but since it is free energy, I don't worry about the loss in conversion.
The reason that I do this is because I have a total of 4,680W of solar in 2 strings. One string is in series and feeds the 6000XP and the other string is paralleled to meet the voltage requirements of the Renogy 3500W inverter charger. The Renogy requires a minimum PV of 60V and a max of 150V (yes, very odd) since it is only a 120V system. The 6000XP has much higher voltage limits. So, the systems charge during the day but the Renogy system always reaches 100% first since it's load is about 167W-334W while charging. It usually reaches 100% in the early afternoon (on a sunny day) while the the 6000XP takes a fun day of sun to reach 100% and sometimes only reaches 70-80%. The daily DOD of the XP is about 30% while the Renogy system DOD is only about 70-75%.
So, transferring some AH from the Renogy to the EG4 batteries is done by the chargeverter. Unfortunately, I have to go out to the garage where my solar system lives and manually switch off the chargeverter when transferring power to the EG4 batteries even after they reach 100% because the fans will continue to drain the Renogy batteries unnecessarily if I leave it connected.
Questions?