I have a working ESS setup, using a Multiplus-II 5000/48 and two imported 48V LifePo4 batteries connected trough CANbus.
After adding two additional batteries and changing the primary battery to the new version, suddenly, the batteries won't get charged passed ~47% at 52.5V. Even when i set the grid setpoint at +1000W or schedule a forced charge, it won't go above. When letting it discharge below 45%, it will gladly recharge back to ~47% max.
I've checked the DVCC parameters from the battery and the CVL is set to 57. The working battery advertised 57,6. In ESS the charge voltage nor charge current are capped.
The only difference i can see is that the new version of batteries get recognised as Pylontech batteries whereas the previous versions did not. This causes DVCC to be 'forced on' instead of just 'on'.
I have a second setup on a different site which has exactly the same issues (i've tried swapping batteries between sites).
Any idea on how to troubleshoot/debug the ESS loop to figure out why ESS stops charging at ~47%/52.5V, or what other settings could possibly be of effect in this?
My guess is that the GX/ESS is somehow treating a 'recognised Pylontech' battery different internally from the same type of battery, but with a different name/vendor.
p.s. Yes, swapping the batteries back in order fixes the issue for now. But that's not an option on the second site, hence my attempt of solving this issue.