Originally Posted by magicbus
A good thought but I’m concerned about then needing to upgrade my solar controller and maybe my charger, plus the batteries hang undid the chassis so I imagine I would have an issue charging in cold temps.
Does your solar controller have a lithium setting? My ZS-30A does, and it provides the added ooompf to bring them closer to fully charged when the sun shines on my 3 100W Zamp panels. I also added a Charge Wizard Pendant to my PD9245 converter/charger (doesn't have a lithium setting) to allow me to manually boost the charge current above 14V when plugged in to shore power, if I think it's needed.
Search on low temperature charging capable lithium batteries. Relion makes them (I have 2 100Ah RB100-LT myself) and I recently saw another major player, maybe Renogy(?) that also makes some that charge down to -20C/4F. They just use some of the charging current to self-heat. (I live in Canada, eh)