Battery Use By Battery-Backup Systems With Increased Self-Consumption - SMA SUNNY BOY STORAGE 3.7 Operating Manual

4 Product Overview
4.6.2 Battery Use by Battery-Backup Systems with Increased
Self-Consumption
Figure 7: State of charge ranges of the battery in battery-backup systems
Range Parameter (technical term)
A Self-consumption range (SlfCsmp)
C Minimum width of backup power range
(BURes)
30 SBSxx-10-BE-en-11
SOC
100 %
0 %
A
C
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.
Range for battery-backup operation during
grid failure This range is set to 0% by de-
fault. If an automatic transfer switching de-
vice is connected, the range must be set de-
pending on your needs. The setting value
refers to the user SOC.
Utility grid available:
When the upper limit of C is reached, the
battery inverter goes into standby mode.
The batteries remain switched on. Excess
PV energy is used for conserving the bat-
tery charge.
When the SOC in range C has decreased
by the set value of range B, the battery in-
verter recharges the batteries with 3 A from
the utility grid.
If the set value of the parameter for range
B is less than the set value of the parameter
for range C, the batteries are recharged in
range D first.
SMA Solar Technology AG
Operating manual