On my 2013 Challenger, I have a Progressive Dynamics Intelli-Power converter/charger. It is, indeed, separate from the inverter. It’s even in a different compartment.
The sales guy has no clue what he’s talking about. The last 2 digits in the model number indicate the max amperage. I believe mine is a 60 amp. It senses your batteries and will use the proper voltage to quickly bring the batteries up to 90% of full charge then tops them off at a lower voltage.
My dad, an electrical engineer, called them (Progressive Dynamics) with detailed questions and was impressed with their knowledge and their service.
You should have received the manuals for your equipment if you purchased new. There should also be a sheet somewhere in your rig with all the model and serial numbers for all the stuff Thor added. If not, it was very easy to snap a picture of my converter on my phone and consult with Dr Google to find the manuals online.
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