The Pylontech battery CAN protocol communicates the maximum charge and discharge current to the inverter. Many Pylontech modules must not be charged below 0 °C to avoid damage, so in that case the BMS reports a maximum charge current of 0 A.
At the same time, the Victron MultiPlus has voltage thresholds configured (Dynamic Cut-off, Low DC shutdown, Sustain, etc.) where charging normally stops or a “sustain/forced charge” would be triggered.
My question is:
If the modules report “do not charge” (0 A max charge current) because of sub-zero temperatures, but at the same time the battery voltage falls below the critical voltage threshold, what will the MultiPlus II do? Will it respect the BMS command and refuse to charge, or will the sustain/forced charge override the BMS limitation? In other words: in this conflict, what takes priority: no charging due to temperature, or the critical voltage recovery logic?
Thanks!