solar generator or 2nd lithium or both or neither?

[John From Detroit]

LiFePO4 batteries are supposed to be able to go down into the low single digits percentage wise w/o damage but I agree don't void the warranty

 

[Micbike52]

Everything is set at mfr standard. If I change setting and lithium battery goes bad, warranty is voided. So I live with it + genny

Do your lithium batts have a Bluetooth BMS display (to phone or screen) where you can monitor the charge/discharge? It seems counterintuitive to have the extended range of lithium, but not to be able to take advantage of it.