4 Product Overview
SMA Solar Technology AG
Operating manual
SBSxx-10-BE-en-11
29
4.6
"Battery Management"
4.6.1
Battery Use by Systems for Increased Self-Consumption
SOC
0 %
100 %
A
E
D
B
Real SOC
User SOC
Figure 6: State of charge ranges of the battery in systems for increased self-consumption without battery backup
Range
Parameter
Battery inverter behavior
A
Self-consumption range (SlfCsmp)
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.
B
Range for maintaining battery state of
charge (PVRes)
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.
D
Minimum width of deep-discharge protec-
tion range (BatRes)
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
E
Lower limit of the deep-discharge protec-
tion range for disconnection (ProtRes)
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.
