Got my LiTime 100amp battery and have been told that I must have a DC to DC charger on my pickup truck in order to charge the Lithium battery in my 5th wheel. My alternator is 180 amp. I realize that the RV converter must be set to Lithium instead of standard battery mode. If mine doesn't switch I will have to upgrade that but was never told or saw on youtube where one needed a dc-dc charger. Some say you do but those people have large battery banks on motorhomes. I realize that the standard alternator won't get the Li to full charge. Just don't want to hurt the new battery or the truck alternator. The battery specs say the BMS will shut the charging down when battery gets to 14.2v. My alternator digital readout states it is putting out 14v when charging only the truck batteries, mines a ram diesel. Just don't want to buy extra things if I don't have to. I'm not an off the grid/full time camper. Thanks.