5 Electrical Connections
5.1 Precautions
After the PV array receives solar irradiance, it transmits the DC voltage to the solar
inverter. Before connecting cables, ensure that the three DC switches on the solar
inverter are set to OFF. Otherwise, the high voltage of the solar inverter may result
in electric shocks.
● The device damage caused by incorrect cable connections is beyond the
warranty scope.
● Only qualied technicians can perform operations about electrical connection.
● Wear proper PPE at all time when connecting cables.
● To prevent poor cable connection due to overstress, leave enough slack before
connecting the cables to the appropriate ports.
The cable colors shown in the electrical connection diagrams provided in this chapter are
for reference only. Select cables in accordance with local cable specications (green-and-
yellow cables are only used for protective earthing).
5.2 Preparing Cables
SUN2000 solar inverters support RS485 communication and MBUS
communication.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 5 Electrical Connections
Issue 11 (2021-11-10) Copyright © Huawei Technologies Co., Ltd. 38
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