Installation Manual
29
All the cables must have sufficient ampacity. The ampacity of the conductor is related to
environmental conditions, conductor insulation materials, laying, wire materials,
cross-sectional areas, and the like.
The cross-sectional area of each cable must be selected according to the maximum
DC current of the inverter with margin reserved.
Cables on the same side should be of the same specification and same type.
Use the flame retardant and fire resistant cables.
Recommended cable specifications are listed below.
Cable
Requirements (mm
2
)
Connection
holes
Specification
DC +
70mm
2
×
16
16 on both of
the
positive
and negative
side
Φ
13
DC-
L1
8 outputs for each phase, 185mm
2
8
for
each
phase
Φ
17
L2
L3
Grounding
cable
The green-and-yellow ground cable of
at least 70mm
2
is connected to the
grounding copper bus bar; or
select according to the related electrical
connection and ground connection
specifications
-
-
Communication
cable
2×0.75mm
2
,
shielded
cable
(recommended)
-
-
Power cable
4-core 2.5mm
2
/
4-core 4mm
2
cable
-
-
Overload on the cables is strictly prohibited!
Cable specifications in this section are only for copper cables. If aluminum
cables are used on site, select cables with appropriate cross-sectional areas
according to onsite conditions.
Cable specifications and input numbers in this section are for standard
inverter. If necessary, specify the special requirements when placing an order.
7.8
DC Side Cable Connection
7.8.1
Cable Check
Check the following items carefully before cable connections:
Measure the open-circuit voltage of the PV array to ensure that the open circuit voltage
does not exceed the maximum DC voltage of the inverter.
Identify cable negative and positive poles and mark them.
Check the PV modules for grounding faults.
