September 21, 20232 yr Hi all wasn't sure if I should post this in the Inverter or Battery section. I am running 2x Suynsynk 5kW and 5x Pylontech (1x US3000C as master and 4x US3000A). My system was running smoothly for months. After a recent Sunsynk firmware update (not by choice, but one of my inverters went in for repairs and came back with an update firmware - so I had to also update the other one) to Comm: E433 and MCU: 3384-0513, I have been problems with my system after my batteries are fully charged. The PV does not track the Load anymore. Instead, PV is throttled to below Load for a while and Battery is used to supplement. Then PV ramps up again to recharge Battery. This cycle repeats. and This obviously is not healthy for my batteries. After raising this with Sunsynk, their feedback is: 'The difference between the battery current and BMS current is too large. Please contact the battery engineer to check the battery and upgrade the battery firmware.' As my system has been previously been running smoothly, I struggle to see a bit how this is the Pylon firmware's fault (since I did not make any changes to them). I am currently running and I have reached out to Pylontech Support with this and requested the latest firmware. I have lost track where here in the forum I can find the latest firmware. Is @Youda's post from 02 Feb still the latest? And should I upgrade my Pylons as per Sunsynk Support? Or does anyone else have any other views?
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