12. FIRMWARE UPDATES
Always ensure all system components are fully up to date before commissioning the system and that all
battery firmware is up to date to support proper closed loop communication.
Please visit https://eg4electronics.com/resources/downloads
for the latest firmware.
13. TROUBLESHOOTING, MAINTENANCE & DISPOSAL
13.1 BATTERY CHARGING
Ensure the proper settings are set on the charge controller and/or inverter being used to avoid
overcharging or damaging the module.
(Refer to Section 2: Technical Specifications Table for a full list of charging/discharging
parameters.)
IMPORTANT:
It is normal for lithium batteries with an internal BMS that are wired in parallel to demonstrate
a wide variety of SOC readings during any given charge or discharge cycle. Variations of up
to 10% are common. This is not cause for concern or indication that the module is providing
less than the maximum capacity. This can be caused by a few different factors, including
variations in wire resistance, internal battery resistance, temperature differences and cell
variations. Even a slight variation causes one battery to take more of the load or charge for a
short time. Over the duration of the discharge or charge cycle, this will balance out with the
lagging battery taking the load or charge at the other end of the cycle resulting in recovering
the full listed kWh capacity of the pack. The voltage differences created as batteries diverge in
SOC will eventually cause them to converge at some point in the cycle.
13.2 ALARM DESCRIPTION AND TROUBLESHOOTING
When the ALM light on the battery control panel is on, it means that the battery has given an alarm
or has been protected from potential damage. Please check the cause of the failure through EG4
Monitor Center or BMS Tools and take appropriate measures or go directly to the battery site to
troubleshoot.
BMS Tools alarms are shown in the table below.
Warning and Protect Status Definitions Table:
Charge
Charge OT Charge over-temperature Power off module and cool down location.
Charge UT Charge under-temperature Power off module and warm up location.
Discharge
Discharge OT Discharge over-temperature Power off module and cool down location.
Discharge UT Discharge under- temperature Power off module and warm up location.
The “Historical Record” tab, which can be found in the BMS Tools program, can indicate what
occurred with the module before entering a warning or protection state. It is recommended to
export this data into a text (.txt) file to provide to the distributor for any additional
troubleshooting assistance.
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