Hello together,
I had a strange observation of my victron system this night, or I would have expected something different, I hope somebody could help me to understand.
My Battery run out of energy this night, or was running to a very low voltage. And as expected the BMSv2 disconnected the loads to reduce/stop the remaining discharge.
The lowest cell voltage setting of my Lifepo4 is 2,80 V and pre-alarm is set to 3,10 V. So would assume that the BMS would do the disconnect at around 11,2 Battery voltage. First of all, am I right?
Then if I see the time series data/logs of this night, it happened a little earlier. And the SOC was still going down after the disconnect, that’s the point where I don’t understand what’s happen. Could somebody help me to understand that point. Attached some Screenshots of battery setting, the voltage chart, and some voltage/soc charts.
Setting of thresholds of my lifepo4:
Lowest point was 11,6 at 2%SOC.
Afterwars the battery voltage increased again, why?
In conflict of the shunts data, in the VRM the last data point was about 4% soc.
At the end I’m happy that my charge/load disconnect strategy and the system works out, but I would like to understand why the values are a bit different then expected.
Thanks,
Ralph