@sandzwerg @fink I actually haven't looked at the salt based batteries myself. I was previously using zinc bromide flow batteries (see long series of posts at https://ourobengr.com/tag/redflow/) but redflow who made them went bust. I now have two stacks of three pylontech pelios (LiFePo4, so, yeah, lithium...) which I will write about in due course (they went in on February 16).

I note that there seem to be options to purchase those salt batteries with Victron inverter/charger gear, and I'm 100% happy to recommend the Victron kit - that's what I have here and previously used with the Redflow batteries, and now use with the pylontech batteries. The great thing is that they work with many types of battery, so if you have to switch to different batteries, you can, without ripping out your whole system.