eTower Installation Manual Revision 0
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Table 14.1 Troubleshooting Guide
The battery displays an alarm
when the beaker is switched on
and will not connect
The most likely cause is that the battery has been
connected to another module or multiple modules that
has/have a vastly different State of Charge and the
battery being switched on is running into overcurrent I
charge or discharge.
If this is indeed the problem, switch off all the other
modules and either charge or discharge the problem
module until its voltage is within one volt of the others,
and then switch the others back on.
If this is not the problem, it could be caused by inrush
current to the inverter – pre-charge the DC bus before
switching on the battery.
The battery alarm comes on and
disconnects when at 100% SoC
Once of the cells might be reaching its maximum voltage
value.
Try reducing the charge voltage setting on the inverter
by to 55.5V and reset the battery by pressing the reset
The alarm light comes on at low
SoC
This could simply be the low SoC alarm that comes on
below 10% SoC. It could also be a low cell voltage alarm.
Increase the minimum pack voltage to 49V, or charge
the battery above 10% SoC
The LED’s do not switch off when
I switch off the breaker
This is not a concern, the BMS will shut down after 24
hours of inactivity
My battery will not charge at
more than 20A
The eTower has an automatic charge limit feature where
the maximum charge current is reduced to 20A using
the internal MOSFET controller if the charge current
exceeds 85A for too long.
This condition will be cancelled once the charge current
has reduced to zero i.e. when the battery is fully
The inverter has shut down
If the battery SoC is below 10% the inverter will be
commanded to shut down. To restore the system you
will need grid power, generator power, or solar power
to recharge the battery to above 15%
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