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Your voltage measuring thingy is before the disconnect though? So those dips on your graph are showing the battery either switching itself off or having its voltage pulled low by a heavy load.
The 60A fuse is big enough that the right size load (maybe 80-100A) might trip the BMS before the fuse blows. That would require some very weird fault in your inverter though…
grams
All the loads are fused, I’m thinking the onboard BMS is the culprit.
I did check the battery protect and it’s set to disconnect loads when the voltage drops below 12v, which hasn’t happened according to the log, but I can set it to 10v and then see if I still get the switch off, in which case it’s likely to be the BMS I think?