Considering New Converter & Lithium Battery

[FlyboyTR]

I have spent several hours reading about lithium stuff both here and over on the Facebook page. Lots of good info from our amazing members.

Rick had posted about using a particular converter, WFCO WF-8955-AD-MBA Main Board Assembly for WF-8900-AD Series Power Center - 55 Amp. That is currently at a great price on Amazon.
https://amzn.to/41flCfQ

I also noted there is another converter that reads almost exactly as the afore mentioned one...just more money: WFCO WF-8955LIS-MBA Main Board Assembly for WF-8900LiS Series Power Center - 55 Amp
https://amzn.to/3lUpZwj

Can anyone explain what the difference is? My plan is to buy the one that Rick S. mentioned in one of his posts. But for me....I get a bit lost in the lithium world. So, looking for some guidance.

I plan to use a single 100 amp lithium battery that I will move to the inside of my 2010 3023 (because of cold weather camping). It will mount forward of the 40 gallon water tank. Currently I have a lead acid 100 amp battery up front and it is working fine...but the lithium bug has bitten me and I am needing a simple and straightforward cure! Thanks!

Travis