4 hours ago4 hr Good day.Hoping there are still some smart folks around here with experience in the weirder setups.I have recently upgraded from my Victron Multiplus II 3000/48/35 system to a Deye 12kWh hybrid inverter. Installer was full of confidence that the BYD battery will work, no problem!However, problem.Seems the BMU CAN comms are not ayoba with the Deye inverter.If hooked up "correctly" (batteries daisy chained, highest address goes to BMU, BMU goes to inverter) , then battery shuts down when mains fails (or turned of for testing). Which is not very helpful.Installer swears it needs a firmware upgrade. I kinda suspect the inverter is not doing the needed keep-a-live signal, but what do I know. Maybe all of the above.After support calls to BYD(?) (by the installer), they apparently can't do it (on which I call bullshit, but whatever).BYD (or anointed support outfit) can apparently come out and do a firmware upgrade though. Have not asked about costs of THAT yet.FWIW, the previous installer (that did the Victron/BYD system) upgraded the firmware of the battery modules some years back. So I know it is possible. I also know BYD is not exactly forthcoming with firmware+tools for this battery model, so that maybe does say something. I found an 2019 update bundle from a random AU site after MUCH digging.Anyway, the installer got the battery working by bypassing the BMU, and setting 2/3 of the battery module addresses to 0, and the one that has Ethernet cable going to inverter to 1.This feels shaky for me. But again, what do I know.So the questions:1. Anybody here got experience / advice with a similar setup? Deye with older BYD battery models (circa 2017-2021)2. Any thoughts/concerns on running the battery as described? Photos can be supplied if needed.Things SEEM to be working ok, but since I can't actually SEE the CAN-supplied data, I can't really verify either way.Thanks in advance.PS: if anybody has a link to an archive of BYD Battery-Box firmware updates and tools... don't be shy? Edited 4 hours ago4 hr by demaniak
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