
6 | P a g e
Battery Management System
The Iron Edison 4LIFe Lithium Iron Battery includes an onboard digital battery management system
(BMS). The BMS monitors voltage, current and temperature on both an individual cell and battery pack
level. If any of these measurements deviate outside of their safe operating ranges, the BMS will actively
work to correct the deviation. If the deviation cannot be corrected automatically, the BMS will initiate a
self-protect shutdown by opening the internal contactor, disconnecting the battery from the charger and
loads.
Safety shutdown features on your inverter(s) and charger(s) should be the first line of protection against
over current or over voltage situations. Set your system’s max current, high battery cutoff (HBCO) and low
battery cutoff (LBCO) according to the Charge / Discharge Parameters section of this manual. The
Battery Management System’s Shutdown is designed as a last resort self-protect shutdown, and should
not be relied upon for managing charge voltage or currents. Doing so will significantly shorten the
battery’s life expectancy and could negatively impact your inverter(s) or charger(s).
High Current Shutdown –If the charge or discharge current of the battery exceeds maximum
permissible levels, the BMS will disconnect itself automatically. To recover from a high current shutdown,
remove the load from the battery, and then rest the battery by turning the battery OFF and back ON.
High / Low Temperature Shutdown –If the battery’s temperature exceeds permissible levels the BMS
will disconnect itself automatically. The battery will automatically reconnect once the temperature has
returned to permissible levels.
High Voltage Shutdown –If the battery’s voltage exceeds permissible levels the BMS will disconnect
itself automatically. To recover from a high voltage shutdown, remove the charge source from the battery.
The battery will automatically reconnect once the charge source has been removed and the battery’s
voltage drops down to permissible levels.
Low Voltage Shutdown –If the battery’s voltage drops below permissible levels the BMS will disconnect
itself automatically. To recover from a high voltage shutdown, remove ALL loads from the battery. The
battery will automatically reconnect once the voltage has climbed back up to permissible levels. At this
point the battery should be charged immediately. If the battery is over discharged and the Low Voltage
Shutdown cannot be cleared, the battery must be returned to Iron Edison for non-warranty service.