So far, my experience with LiFePO4 has been that the non lithium rated converter has kept the battery at full charge. My TT is always connected to power in storage so extra charging time hasn’t mattered. I did buy and initially use a standalone battery charger to make sure it got the full voltage needed to equalize the cells occasionally. As long as the stock converter voltage is higher than the battery, it will continue charging. A lithium capable converter puts out higher voltage and amperage to charge the battery faster. I’ve since installed 200 watts of CIGS solar panels with a solar controller (previously had free standing panels) that keeps the batteries topped off. I have no plans to replace my converter unit. I did research that. About $240 or so for the WFCO converter and install didn’t seem to hard for a semi-knowledgeable DIYer. On my power center, its the metal box attached below the fuse box.