[oil pan 4]

I have found that using LiFePO4 batteries in a vehicle you may want to charge limit your lithium battery bank.
The alternator belt on my truck is plenty tight and on cool mornings when I have to glow plug it and crank it for more than 3 seconds the lithium batteries draw so much power after start up they can make a tight v-belt slip squeak.

If you were to do an alternator disable and then try to charge these kinds of batteries by reenableing the alternator you might burn it out, since most car alternators are only ment to charge a battery used for starting and power the cars electrical system.

Or you could burn up the battery charging wire.
This happened this happened in my truck, after cranking and cranking then fireing it up on a real cold morning, it burned up its factory 12-14ga battery charging wire. To fix this I put a heavy duty alternator in and rewired the alt with an 8ga cable with soldered ends. Problem solved.