Advice on charging Lithium battery through my alternator

[Van Morison]

Hey guys! I have a 12V, 100Ah, LiFePo4 battery and want to charge it through my alternator. I bought an isolator cutting in at 13,3V and out at 12,8V so I won't drain my starter battery while using the house battery. However, I'm concerned that my alternator will blow up when driving because my lithium battery draws too much amps. I've been looking into DC/DC chargers, however the different Victron DC/DC chargers seems to limit the power to 9A and 30A (based on the one you buy of course..). Isn't this very low? Since most alternators are around 150A? And will I still need my isolator if I buy a DC/DC charger? Electric guys please help

 

[Sprinter 1 cup]

100 ah battery charger = solar as when you need charging derv at 154.9 is expensive.
If you need a faster charger you need more batteries.
I have a 30amp victron dc 2 dc and it never charges at 30amps into my 100ah battery. Around 20ish after 20 mins dropping down at above 50% to teens. if started from 30% SOC