I have a 4s4p bank of 120ah cells, so 480ah @12v in total.
I've noticed that when I apply a high current load (of Circa 150amps) for a couple of minutes, (2000w kettle) the battery voltage drops from 14.4 to about 12.9v. when the load switches off the voltage only climbs up to about 13.6.
2min at 150a is only 5ah. Out of 480. The soc meter from the dalgreen BMS doesn't show any significant drop in SOC. (But i think the soc meter is working properly. By design or by installation?) My system is always around the 40% mark)
Surely removing this much charge shouldn't drop the voltage so dramatically? Or is this normal?
Thanks for your thoughts.
I've noticed that when I apply a high current load (of Circa 150amps) for a couple of minutes, (2000w kettle) the battery voltage drops from 14.4 to about 12.9v. when the load switches off the voltage only climbs up to about 13.6.
2min at 150a is only 5ah. Out of 480. The soc meter from the dalgreen BMS doesn't show any significant drop in SOC. (But i think the soc meter is working properly. By design or by installation?) My system is always around the 40% mark)
Surely removing this much charge shouldn't drop the voltage so dramatically? Or is this normal?
Thanks for your thoughts.