Alpha ESS SMILE-G3-S3.6 Installation, Operation & Maintenance Manual page 24

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The LED indicators provide information about the State of Charge (SOC) status
of the battery pack.
LED Indicator
LEDs show the SOC
of batteries
Note that the LED lights provide an approximation of the State of Charge and should
be read as an indication and not as a set value.
SOC Description
SOC≤5.2%
5.2%＜SOC≤9.5%
9.5%＜SOC≤25.2%
25.2%＜SOC≤50%
50%＜SOC≤75.2%
75.2%≤SOC≤100%