I have started setting up a 48V LiFeP04 battery system with a MultiPlus II 48/5000/70-50. Before the installation, I am now doing various tests to understand all the features and parameters of setting up the MP-II. When I did the low-shutdown voltage test, I found that the MP-II shutdown the inverter before the set voltage.
I have voltage sense wire connected to the +ve and -ve ends at the battery pack. I set the low-shutdown voltage to 44v in VictronConnect. I do not use ESS Assistant. When the load is around 70A, the voltage at the battery connection terminals of MP-II is around 0.65V lower than that at the battery +ve/-ve terminals. The current drawn was kept stable at around 70A. When the voltage shown in VictroConnect dropped to 44.38V, the MM-II shut down the inverter. Before the shutdown of the inverter, the voltage was gradually/slowly dropping so the 44.38V was not caused by a sudden voltage drop. At the time of the inverter shutdown, the voltage at the MP-II battery connection terminals were 43.73V.
Can anyone help and tell me why MP-II shut down the inverter before the set voltage in my case?