SUN2000 (8KTL-28KTL)
User Manual
Copyright © Huawei Technologies Co., Ltd.
Figure 5-15 Removing an AC output connector
5.3 Connecting DC Input Power Cables
Connect the SUN2000 to PV strings using DC input power cables.
Prerequisites
PV modules generate electric energy when exposed to sunlight and can create an electrical
shock hazard. Therefore, when connecting DC input power cables, shield the PV modules
with opaque cloth.
Before connecting DC input cables, ensure that the voltage on the DC side is under the
safety limit (60 V DC) and that the DC SWITCH on the SUN2000 is OFF. Otherwise, high
voltage may result in fatal injury.
Ensure that the following requirements are met to prevent fire accidents:
PV modules connected in series in each PV string must be of the same specifications.
The maximum open-circuit voltage of each PV string must be always lower than or equal
to 1000 V DC.
The maximum short-circuit current of each PV string must be always lower than or equal
to 23 A.
The positive and negative terminals of PV modules must be connected to the positive and
negative DC input terminals of the SUN2000 respectively.