Battery Management; Battery Use By Systems For Increased Self-Consumption - SMA SUNNY BOY STORAGE 3.7 Operating Manual

SMA Solar Technology AG
4.6

"Battery Management"

4.6.1

Battery Use by Systems for Increased Self-Consumption

Figure 6: State of charge ranges of the battery in systems for increased self-consumption without battery backup
Range Parameter
A Self-consumption range (SlfCsmp)
B Range for maintaining battery state of
charge (PVRes)
D Minimum width of deep-discharge protec-
tion range (BatRes)
E Lower limit of the deep-discharge protec-
tion range for disconnection (ProtRes)
Operating manual
SOC
100 %
0 %
A
B
D
E
Battery inverter behavior
The battery inverter uses the batteries within
this range for increased self-consumption
and for the "Time-of-Use" and "Peak Load
Shaving" functions that can be configured
in the power profile.
The battery inverter checks the current SOC
every 24 hours. If the SOC is in range D,
the batteries are recharged with 3 A from
the utility grid until the upper limit of range
B is reached. If the utility grid is not avail-
able, the batteries cannot be recharged.
The battery inverter recharges the con-
nected batteries with 3 A. The recharging
process does not stop until range A is
reached.
If the utility grid is not available, the battery
inverter cannot be switched on to check the
SOC of the batteries.. The battery inverter
and batteries are switched off. Exception:
black start function
When this range is reached and the utility
grid is available, the battery inverter
charges the batteries with 3 A from the util-
ity grid until range A is reached.
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