Operation | 4
KD-536 | 1000051 | EN | 02
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4.1.2 Backup operation - grid outage
5
20
40
60
80
100
ON AL
Test
Reset
R
AL
kΩ
1
2 3
5
F1
SPV
2
6
3
I
0
off
off
off
4
2
3
+
Illustration 3: Backup operation - grid outage
1
Consumer connected to phase L1
6
Storage system
2
Consumer connected to phase L2
7
Battery of the storage system
3
Consumer connected to phase L3
8
PV system
4
Consumer connected to backup circuit
9
Public electricity grid
5
sonnenProtect
The sonnenProtect (5) automatically detects a grid outage. As soon as the voltage of the
electricity grid drops to approx. 180 V, the connection to the public electricity grid (9) is
disconnected.
Backup power is generated after max. 15 seconds. The consumers connected to backup
circuit in the house (4) are thereby supplied with electrical power. Consumers connected
to the phase L1, L2 or or L3 (1 - 3) will
not
be supplied with electrical power.
The switchover from grid to backup operation is signaled by the sonnen Eclipse (light ring)
on the storage system. The color of the sonnen Eclipse changes from
white
(normal opera-
tion) to
green
(backup operation).
Electrical power generated by the PV system (8) continues to be used by the storage sys-
tem to supply the consumers in the backup circuit and to charge the battery.
The storage system with sonnenProtect switches from backup to grid operation as soon as
the public electricity grid (9) starts to deliver electrical power again.
Automatic stop and resumption of the backup operation
The storage system with sonnenProtect generates electrical power until a minimum state
of charge of the battery is reached. Thereafter, no further discharge is allowed.
