Not being an electrician I don’t completely understand your question. Are you asking about the existing Converter in the motorhome? If so it’s a PD4560 by Progressive Dynamics. It’s basically the entire 110 volt and 12 volt electrical panel all in one with the converter built into the panel. The one I have has the switch to turn it to Lithium mode. Per their website having that switch is an option. So luckily for me Nexus ordered the panels with that option. So I’m good for charging the batteries with the generator or when I’ve got 110 power. But I have a residential fridge so I want the batteries to charge from the alternator too because on long drives there will always be a draw on them otherwise. I understand it may not fully charge the batteries, but as long as it keeps them going.