5 Electrical Connections
5.1 Precautions
When exposed to sunlight, the PV arrays supply DC voltage to the inverter. Before
connecting cables, ensure that all DC SWITCH on the inverter are OFF. Otherwise,
the high voltage of the inverter may result in electric shocks.
● The site must be equipped with qualied re ghting facilities, such as re sand
and carbon dioxide re extinguishers.
● Wear personal protective equipment and use dedicated insulated tools to avoid
electric shocks or short circuits.
● The equipment damage caused by incorrect cable connections is beyond the
warranty scope.
● Only certied electricians are allowed to connect cables.
● Operation personnel must wear PPE when connecting cables.
● Before connecting cables to ports, leave enough slack to reduce the tension on
the cables and prevent poor cable connections.
● Cables must be vertically routed into combiner boxes, PV terminals, and other
wiring terminals to avoid damage caused by horizontal stress on the terminals,
which is not covered under the warranty.
SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual 5 Electrical Connections
Issue 18 (2024-03-10) Copyright © Huawei Technologies Co., Ltd. 37
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