24
25
PV
Arr
ay
Grid
Normal
Lo
ads
RCD
RCD
Back
-up
Lo
ads
PV
Arr
ay
Communic
ation
Communic
ation
BA
CK
-UP
The additional
gr
ounding hole
ON-GRID
PV1+
Br
eak
er
E-BAR
N-BAR
Br
eak
er
RJ45
1(L1)
5(L1-S1)
12(L)
9(L3-S1)
10(L3-S2)
2(L2)
6(L1-S2)
3(L3)
7(L2-S1)
4(N)
8(L2-S2)
13(N)
Br
eak
er
Main Swit
ch/Br
eak
er
Sunw
ays C
T
C
T-1
C
T-2
C
T-3
Swit
ch/Br
eak
er
L1
L1
L2
L2
L3
L3
N
N
PV2+
PV1-
PV2-
RJ45-BMS
RJ45-Me
ter
B+
B-
Bat
te
ry
ST
H
Hybrid
Inv
ert
er
Sunw
ays Me
ter
Figure 4-10 Australia wiring diagram
This diagram is an example for Australia and New Zealand. Neutral line of AC supply must not
be isolated or switched.
Do not connect the N-wire as a protective ground wire to the inverter casing.
Otherwise, it may cause electric shock.
Good grounding is good for resisting surge voltage shock and improving EMI
performance. Inverters must be well-grounded.
For a system with only one inverter, just ground the PE cable.
For a multi-inverter system, all inverters PE wire need to be connected to the
same grounding copper bar to ensure equipotential bonding.
4.3.2 External ground connection
Ground terminal connection steps:
1) The external grounding terminal is located in the lower right side of the inverter.
2) Fix the grounding terminal to the PE wire with a proper tool and lock the grounding terminal
to the grounding hole in the lower right side of the inverter. As shown in Figure 4-11:
Danger
Attention
Connect the inverter and ground bar through PE wire to achieve the purpose of grounding
protection. Please always remember wiring the PE wire before wiring other wires.
Figure 4-11 Grounding terminal connection
4.3.3 Inverter PV string connection
4.3.3.1 The following principles must be considered when making electrical connections to the
inverter:
1) Disconnect the AC breaker on the grid side.
2) The DC switch of the inverter must be turned to the "OFF" position.
3) The number and type of the PV panels connected in the two strings of one MPPT must be same.
4) Make sure the maximum output voltage of each PV string does not exceed 1000V.
