Specication Requirements
Cables with high rigidity, such as armored cables, are not recommended, because
poor contact may be caused by the bending of cables.
Use the Amphenol Helios H4 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
congured to the
same string. Remove some PV modules.
Step 6 Insert the positive and negative connectors into the corresponding DC positive and
negative input terminals of the solar inverter.
Figure 5-21 Connecting DC input power cables
SUN2000-(100KTL, 110KTL, 115KTL)-M2
User Manual 5 Electrical Connections
Issue 02 (2022-06-30) Copyright © Huawei Technologies Co., Ltd. 56
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