No alternator for me either. Is one on the dragster however. The biggest issue will be voltage output as most lithium’s do not tolerate the voltage that their AGM/conventional batteries do. I believe we have it turned down to 17.5 volt iirc max is 17.9 anything over that and you risk fore etc.
The big issue with lithium batteries and fires is overcharging. Using the wrong charger can and will Cause a fire. All the ones I have seen have very specific voltage requirements when being charged.