Sonnen sonnenBatterie eco 7.0 Series, Operation And Installation Instructions Manual, Page: 54 / 115

6 Electrical connection
6.6.6 Connecting PV cutout
Cutout of the PV system by a relay (as described here) is unnecessary if the
output power of the PV inverter can be reduced to 0% by PV reduction. The
advantage of reducing PV generation to 0% compared to cutting out by a
contactor is that the PV inverter is ready to operate again faster.
The last measure to implement feed-in power limitation is cutout of the PV system
by the storage system. For this purpose there is terminal 23 on terminal block X1,
activated (+24 V applied) as soon as cutout of the PV system becomes necessary.
PV cutout is through a relay (K2 in the following diagrams). Coil connection A1 of
the relay is joined to terminal 23 (the maximum current across which is 500 mA).
Coil connection A2 is joined to terminal 8, 9, 10 or 11 (all on GND potential 24 V)
of terminal block X1.
On three-phase PV inverters it is adequate to interrupt a phase conductor to
completely cut out the inverter.
PV cotout variant 1
In this case relay K2ex out the PV inverter directly by separating phase conductor
L1 of the inverter from the public grid.
Figure 33: PV cutout variant 1
1 PV inverter
K2
ex
External Relay with NC as main contract (not part of delivery)
Terminals 8, 9, 10 and 11 are all on GND potential.
Page 54 of 115 KD-262 | Part-No 52199 | EN | Version 1.00
18 25 19 20 21 22 23 24 5 6 7 8 9 10 11
L1 L2 L3 N PE
1
L1
L2
L3
N
PE
+24VDC GND
K2
ex