Lithium batteries are very efficient when it comes to charging and an LPO battery bank can take up to 1C or 100% of its capacity when charging without slowing down. This is great when charging through solar or a generator as you have limited time but it may cause issues for your alternator. Alternators are not made to put out full amperage constantly they may end up burning out when charging lithium batteries. It is this or charging up to 70% charge of your battery. One solution is changing the alternator to get one that can pump enough amps to your battery. Another is getting a Battery Isolator or a DC to DC charger. It can be set for Lithium batteries and allows your engine’s alternator to take a break and saves it from wearing out.