Not sure why everyone is making stuff up. I happen to make my own batteries in both Li-ion and Lifepo4 for E-board, bikes, automobiles and I'll be making them for solar applications in the future.
Lead acid batteries suck. They constently lose power requiring float or trickling.
A lifepo4 battery won't catch fire... They are nothing like li-ion. When a battery gets full it simply hits thermal load and disconnects worst case. A battery pulls what it needs and regulates its self based on voltage and Lifepo4 batteries have a resilient voltage threshold. Your accessories will likely pull the most power and depending on how many Ah your battery is it will pull 3A per parallel connection... So 25Ah batteries may pull like 12A... A 100Ah battery would pull up to 50A and that's if it's low.
All you need is a bms, which a good lifepo4 should have anyway. It will keep cells balanced, keep it from over over heating, charging under low Temps and over discharging etc. The limits on charging on a decent bms are like 100A but this depends on the battery and the alternator shouldn't have much of an issue keeping up unless you have a big sound system In which case that's a whole other problem.