SMA Sunny Island SI3300, Installation & Operating Instructions Manual

Page: 114 / 180

Sunny Island Installation & Operating Instructions
BWRI33-12:EE
- 114 -
SMA Regelsysteme GmbH
Battery states Description
L4, L3, L2, L1 Reduced availability of the battery and increased battery aging
N4, N3, N2, N1 Normal working area with varying availability of the battery
O1, O2, O3 Overload
Table 11.1: Classification of battery states
The eleven defined battery states allow the user to make switches according to the
battery state. The following table provides an overview of the different battery states
(BST), their meaning and recommendations for possible switching measures:
BST Meaning Recommendations Possible switching measures
O3 Very high
overload Immediately stop charging Switch off all feeders via the fre-
quency
O2 High
overload Drastically decrease charging
power Slight increase of frequency to
switch off first PV inverters
O1 Overload Decrease charging power Switch on dumpload
N1 Very high se-
curity of sup-
ply None Switch off dumpload
N2 High security
of supply Notification of charge degree; if
required first reduction of con-
sumers Switch off first load groups that are
not continuously used or reduction
of power
N3 Normal secu-
rity of supply Either reduce consumption or
make sure battery is charged
soon Switch on dumpload soon or switch
off certain load groups
N4 Low security
of supply Either reduce consumption
drastically or make sure battery
is charged soon Switch on dumpload immediately
or switch off all load groups that
are not urgently required
L1 Increasing ag-
ing Reduce consumption except for
emergency supply; initiate
charging, alarm message Switch on dumpload immediately
or switch off all load groups except
for emergency supply
L2 Strong aging Switch off all consumers, initiate
charging Switch on dumpload immediately
or switch off all external load
groups
L3 Very strong
aging Reduce internal consumption
immediately, initiate charging,
alarm message via switch-off Inverter into standby operation
L4 Destruction of
battery immi-
nent Immediately reduce internal
consumption, initiate charging,
alarm message via switch-off Switch off inverter
Table 11.2: Battery states and recommended measures