eTower Installation Manual Revision 0
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2.2.3 State of Charge Indication
The State of Charge (SoC) of the battery is indicated by six green LED’s as a percentage of the
module’s maximum energy storage value in kWh. These LED’s are numbered one to six where
number one is the LED positioned furthest to the right and number six is the furthest to the left. The
LED indicating the present top SoC range flashes when the battery is receiving charge current. The
SoC level allocation to each LED illumination combination is provided in table 2.2 below.
Table 2.2 State of Charge (SoC) Indicator Capacity Matrix under Discharging/Inactive and Charging
states
Capacity
Status
Discharging or Inactive (no current flow)
6%
on
off
off
off
off
off
Flash
off
off
off
off
off
33.2%
on
on
off
off
off
off
on
Flash
off
off
off
off
49.8%
on
on
on
off
off
off
on
on
Flash
off
off
off
66.4%
on
on
on
on
off
off
on
on
on
Flash
off
off
83.0%
on
on
on
on
on
off
on
on
on
on
Flash
off
100%
on
on
on
on
on
on
on
on
on
on
on
Flash
2.2.4 Run Indication LED
The green “run” LED is illuminated whenever the battery is in a running or ready state, i.e. when the
BMS is on and there are no faults.
2.2.5 Warning LED
The red “Warning” LED illuminates if there is an active alarm or fault. The LED is otherwise
not illuminated. If this LED comes on there is likely a cell over voltage fault if the battery is at
100% SoC at the time. If the battery is at a low SoC the warning will most likely relate to a
low SoC alarm (SoC below 10%) or a low cell voltage alarm, which would normally only occur
below 10% SoC anyway.
2.2.6 Address Dip Switches Block
The block with four binary dip switches must be set to a specific configuration that allocates
the address of the eTower module. Each module must have its own address beginning with
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