I have used a number of newer magnum inverters with lithium batteries pretty successfully with custom absorb/absorb time/float settings (newer being 5 to 10 years old or so), on both 24 and 48 volt systems. I have heard that some of the older ones, however, just cannot work with them, even with custom settings. I can't remember what the issue is, but it's something that just doing custom settings cannot fix (or maybe it's that they can't take custom settings?). I konw that the standard DIP settings on the PT100 don't work, so if you don't have a magnum inverter and ME-ARC to do custom settings, the PT100 won't work well with lithium batteries.
I am interested in seeing what the lithium settings on the new Magnum card is. I recently ran into a different inverter (AIMS) which the lithium rotary switch setting had an absorb of 57.6 which is okay for some 16 cell LFPs, but a bit too high for others -- I've run into a lot that shut off the BMS at more like 56.5 or so. I could not determine what the absorb time was, which isn't good. And the float voltage was also 57.6, which is really bad. So, just because an inverter has a lithium setting, doesn't necessarily mean it will work with a particular BMS for a particular lithium battery. Zeke
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