Scenario
Model of Y-branch
Connector (Part
A)
Connection Description
Connecting
Y-branch
connectors
to the PV
strings
(recommen
ded)
All models
Use the DC terminals delivered with the
SUN2000s to connect part B to the
SUN2000s.
Connecting
Y-branch
connectors
to the
SUN2000
Models
recommended by
Huawei
Part A can be directly connected to the
SUN2000, and part B is not needed.
Other models
To ensure that the terminals of part A
match the DC terminals of the
SUN2000, part B is needed to connect
part A to the SUN2000. Use the DC
terminals delivered with the SUN2000
to connect part B to the SUN2000.
Specification Requirements
Cables with high rigidity, such as armored cables, are not recommended, because
poor contact may be caused by the bending of cables.
CA UTION
Use the Staubli MC4 connectors delivered with the solar inverter. If the PV
connectors are lost or damaged, purchase the connectors of the same model. The
device damage caused by incompatible PV connectors is beyond the warranty
scope.
Procedure
Step 1 Prepare the DC input power cables.
Step 2 Crimp positive and negative metal contacts.
Step 3 Insert the contacts into the corresponding positive and negative connectors.
Step 4 Tighten the lock nuts on the positive and negative connectors.
Step 5 Use a multimeter to measure the voltage between the positive and negative
terminals of the PV string (measurement range no less than 1100 V).
●
If the voltage is a negative value, the DC input polarity is incorrect and needs
correction.
●
If the voltage is greater than 1100 V, too many PV modules configured to the
same string. Remove some PV modules.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual
5 Electrical Connections
Issue 11 (2021-11-10)
Copyright © Huawei Technologies Co., Ltd.
63
