Are there any dc-dc chargers that let it "reverse" charge as wel? As in when my solar gets my lifepo4 bank fully charged that it wil then charge back to my sla starter battery? I know about the renogy dc-dc-mppt unit. But the problem with that thing is the solar voltage is absolute GARBAGE and not something i can deal with. I dont have space to run 6-7 crappy 12v panels with low voltage. I have a big 560wp panel in mind for the new setup, and that would work great with for example a victron 100/50 mppt. But then i can only charge my lfp bank from it. But if that bank is full then the solar is sitting there doing nothing while it might as wel charge the starter battery. In my current config i have 2 lead acids for service and 1 for starting and a victron cyrix wich i think connects the banks together if the voltage on 1 of the 2 sides is high anough. But i obviously dont want to run a cyrix between the starter lead acid and the service lfp banks.(560Ah eve 4s2p)