Q: What is the quiescent current? What can I do for long-term storage?
A: The quiescent current is as follows:
● 5.5 milliamps with everything off, when the BMS is active, but no bluetooth.
● 15 milliamps with the bluetooth active (after about 10 seconds it drops to 0.8 milliamps. Reconnecting it wakes it up again).
● 0.8 milliamps when the BMS is inactive.
So, assuming your battery setup is 100 amp hours, the BMS would run for 17 years. This proves that the BMS can be connected for long periods of time without any fear of it draining the battery.
Unplugging the balance connector would ensure complete shutdown
NOTE: The cell’s self-discharge rate will always cause the battery to drain over time, which may be several percent per month. This is simple chemistry and physics; there’s nothing that you or the BMS can do to avoid the battery cells from self-discharging over time, other than to occasionally top up the batteries.