2 connection area, 3 connecting the grounding conductor, In systems with grounded battery – SMA SI 3.0-11 Installation User Manual
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SMA Solar Technology AG
7 Electrical Connection
Installation Manual
SI30M-44M-60H-80H-IA-en-30
25
7.2 Connection Area
Figure 8: Connection area of the Sunny Island inverter
7.3 Connecting the Grounding Conductor in Systems With Grounded Battery
If you ground the battery, you can ground it at the positive terminal or at the negative terminal with a grounding
conductor. SMA Solar Technology AG does not recommend grounding the battery. If the battery is grounded, the
enclosure of the Sunny Island must also be grounded. This additional grounding is no substitute for the grounding at
connections AC1 and AC2.
Position Designation
Position Designation
A
DC+ connection
I
Enclosure opening for DC-
B
DC- connection
K
Enclosure opening for DC+
C
BatTmp and BatCur connections
L
Enclosure opening for PE/ExtVtg
D
BatVtgOut and DigIn connections
M
Enclosure opening for AC2
E
2 interface slots
N
Enclosure opening for AC1
F
Relay1 and Relay2 connections
O
ExtVtg connection
G
Communication connection
P
AC1 connection
H
Cable feed-through plate
Q
AC2 connection