I am removing the FWC isolator and replacing it with the Blue Sea 7622 ML-ACR. I will have two Blue Sea 187 circuit breakers, one at the truck battery and one at the camper battery area. My truck battery is AGM, my camper battery will be LiFepo4. My system will is set up to charge both my truck and camper batteries and prevent a truck battery drain. When I spoke to a friend who owns a Alternator shop, he was concerned about the system since I will have two different type of batteries. Is there a danger in destroying either battery. I do not believe my RV mechanic will be attaching anything to my truck alternator. Thanks for your help. Tim