08
07
DC Cable specification please refer to Figure
3.4.2-4
.
Value
4
~
5mm
2
.
5
~
4mm
²
7mm
around
Grade
Description
A
O.D.
B
Conductor Material
Sectional Area
C
Bare Wire Length
Figure
3.4.2-4
A
B
C
Figure
3.4.2-3
Negative connector
Positive connector
Inverter
Special tools are used to stitching
Installation instruction of MC4 connectors please refer to Figure
3.4.2-3
.
Inverter
Positive connector
Negative connector
Figure
3.4.2-2
For better inverter IP65 protection from water and dust, all pairs of DC connectors provided in accessory bags should be used.
However, if there is still extra pairs unused after installation, please make sure the unused pairs still be connected to the inverter with
exposed wires compressed, the exposed wires should be at least kept 15mm out of DC connectors, please refer to Figure 3.4.2-5.
Otherwise, DC connector protecting cover in the accessory bag could be used to cover the exposed DC connector.
There are two types of DC connectors,
SUNCLIX and MC4 series. Please refer to Figure 3.4.2-1.
Installation instruction of SUNCLIX connectors please refer to Figure
3.4.2-2
.
SUNCLIX
Series
MC4
Series
Figure
3.4.2-1
3.4.2
DC Side Connection
(
1
)
Before connecting PV string, make sure DC switch is turned off
(
2
)
Make sure PV string polarity confirms with DC connector, otherwise, it will cause damage to inverter.
(
3
)
Make sure the maximum open circuit voltage (Voc) of each PV string does not exceed the inverter input voltage
Vmax under any condition.
(
4
)
Only DC connectors provided by GoodWe are permitted to use.
(
5
)
Do not connect positive or negative pole of PV string to earth wire. Otherwise, it will cause damage to inverter.
.
Grid compatibility
L1
L2
L3
N
PE
GoodWe
DT
Series
PE
Transformer
TN
-
S
L1
L2
L3
N
PE
PE
Transformer
TN
-
C
-
S
GoodWe
DT
Series
L1
L2
L3
N
PE
Transformer
TT
GoodWe
DT
Series
Figure
3.4.1-5
DT series
GW09K
-
DT
~
and SDT series support four different types of grid.
3.4.1-5.
GW25K
-
DT
please refer to Figure
Note
：
For TT grid structure, RMS voltage between neutral wire and earth wire must be less than 20V.
