Hello,
I have a Multiplus-II 5000, Cerbo GX, an array of Pylontech US2000C and a Fronius Primo 5kW (probably irrelevant to the problem). System is configured with ESS assistant (optimized without battery life) following the settings supplied by my retailer - 48v low battery alert and 44v disconnection)
I've been having this issue for a bit more than 24 hours now, at any point of the day or night, even with just baseload (100-200W) the Multiplus will throw a low voltage alarm (tension = voltage, basse = low) like on that screenshot with crazy low readings :
It will trigger a few times in a row over 5-15 minutes with the red led and audio alarm and then trigger the disconnection protection causing the whole system to reboot and then be fine again for a few hours. Everytime I check the remote console the voltage is fine around 49.5V, cells are very balanced and shown as working fine.
Maybe unrelated : yesterday afternoon I had extra solar production and Multiplus was sentding everything to the grid while batteries were at 65%... ATM this morning, it's going in bulk mode fine when there is extra solar power.
How can I figure what is causing these random low voltage spikes or (is this even possible ?) erronous readings triggering alarms?
Edit :
Some extra information from the VRM dashboard, VE.Bus reports low voltage spike but the BMS reports normal value at the same moment :
And by posting this I realise that VE.Bus was reporting a much higher voltage than the BMS for a while and the low voltage spike happened just at the moment it seemed to sync back to the real value.
