I've done an old XW4548 (pre XW+ and pro) with old style discover lithium batteries, open loop. Victron charge controllers on that one. It works fine after a little tinkering to get the voltages exactly correct for grid sell. And I have an off grid XW6848 with an Outback FM100 charge controller on the white wall mount Iron Edison lithium batteries. Only real issue with the XW inverters is that you cannot set the LVD low enough to be of any use with a 16 cell LFP. With a 15 cell LFP it would be possible... I had to add a separate load shed relay controlled by the aux of the FM100 on the off grid one to dump the loads when battery voltage got below 50 volts. I'd be hesitant to try to do closed loop with any Schneider equipment though, unless I had a lot of time to mess with it... I always felt that their hardware was bulletproof, but their software interface left a lot to be desired, especially the pro (that's when I stopped using Schneider).
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