We have 5 in our van 300 amp lithium for the AC only separate system and chargers. Also the starting battery and 3 agm house batteries for lights and fridge etc. Works very well and is nice to have ac all weekend without being plugged in.Be careful mixing chemistries in batteries without an isolator , and be sure your charger can manage different chemistries at the same time . Some need to be set for a battery type .
Doing a load calculation for what you require to run is important, so not only do you know what you use , but also what you don’t use . We had three batteries in our RV , a starter battery that only started the engine , separate from everything. And two deep cycle flooded conventional batteries , I went with deep cycle group 31 to after pulling two huge G2 golf cart
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