Conext XW6848 Multi Inverter Random Shutdown F69

@mike760

i have a very similar problem to you.  Our system sounds very similar as well … I have a parallel master-slave XW6848PRO system and I too have found this to be a relatively new phenomenon … I had convinced myself that maybe it truly was EMI noise from slugs of current confusing the communications link for the ac sync … and possibly even the Xanbus link to my BMS in my master battery via the Insight Home.  I’ve had this thing configured in a variety of ways added ferrites, shortened cables, tan cables outside the shielded channel, seappped ports, shielded the cables to no avail.   Also tried to link an high current slug event to the ‘confusion episodes’ but really cannot.  I have started to realize this happens on roughly a two week cycle and I think there maybe a combination of poor/non-robust communication link timing/design and possibly a related side effect I’d also being more susceptible to noise events tripping up the delicate timing.   I’ve had “communication error storms” that occur every couple weeks and this has been a recent occurrence.  When I’m one of these storms it seems that even a reset does not fix the problem for very long.  And then after that 12hr period of the storm time passes it runs like a champ for another couple weeks.  I think that the communications timing is either on a slip cycle where clocks slide in relation to data and then the system is in a precarious condition and vulnerable to noise confusion for that period of time until the asynchronous clocks slide further into a place where they once again have margin for error with noise triggering bad data reads.  They may or ma not have updated firmware with a fix but I am going to need to build a lot of confidence that the firmware upgrade is a proven fix for my problem before I risk creating more and other evils I do not know.  Or risk of bricking an inverter in the FW change process .   I’d be very interested to know if you found a fix and if it was in firmware upgrade?

Dave Angelini 

I totally agree that his system was XW+ and my system being XWPRO so his solution is not going to be my exact solution but I was still curious if he came to a resolution and if it ended up with Schneider fixing non-robust communications links with new firmware because that could be informative to me about the kinds of things I may find with my XW PRO issue.   I literally was going through one of those 12hr data comma funk periods on 6-1-24 when I wrote my comments … and like before … after pulling my hair out watching it go down then back up repeatedly and sometimes resetting it myself only to watch it get confused again shortly afterwards and watching it run it’s course … THEN it started running like a champ again (~12hrs later after initial fail of the sequence).

what I find is:  first will be the ac sync error followed by ‘perceived’ system multi-unit config error then I will also see ‘lost comms with BMS’ which spawns an erroneous ‘low SOC’ … and when I’m in one of these periodic extended error storm funks it will continue going through this sequence even with me providing resets once i become frustrated with watching the system go down then back up and down etc.  I do know that there is definitely heightened Solar flare activity this weekend and these Solar events have been a fairly common occurrence in recent months … I definitely feel it is susceptibility and noise source combinational type problem … and after seeing about 3 to 4 of these ‘error storms’ repeating every ~2-3weeks I am definitely starting to see a pattern with the timing between events. 

I didn’t have to update to this FW.  Both my inverters were this version out of the box in Fall 2022 at time of install and I am not selling to grid … majority of the time my config is completely off grid.