Ensure that the following conditions are met. Otherwise, the inverter may be
damaged, or even a re may occur.
● PV modules connected in series in each PV string are of the same specications.
● The maximum open-circuit voltage of each PV string must be less than or
equal to 1100 V DC.
● The maximum short-circuit current of each PV string must be less than or equal
to 20 A.
● PV strings must be connected in the correct polarity. The positive and negative
terminals of a PV string connect to the corresponding positive and negative DC
input terminals of the inverter, respectively.
● If the DC input power cables are reversely connected, do not operate DC
SWITCH or the positive and negative connectors immediately. Wait until the
night when solar irradiance declines and the PV string current drops to below
0.5 A. Then set DC SWITCH to OFF, remove the positive and negative
connectors, and connect the DC input power cables correctly.
If power cables are not properly installed or routed during the installation of PV
strings and the inverter, the positive or negative terminals of PV strings may be
short-circuited to ground. In this case, an AC or DC short circuit may occur and
damage the inverter. The resulting device damage is not covered under any
warranty.
● The output of the PV strings connected to the inverter cannot be grounded.
Ensure that the PV output is well insulated to ground.
● PV modules and optimizers in the PV strings connecting to the same MPPT
must be of the same model and quantity.
Terminal Description
Figure 5-4 DC input terminals
SUN2000-(12KTL-25KTL)-M5 Series
User Manual 5 Electrical Connections
Issue 10 (2024-05-14) Copyright © Huawei Digital Power Technologies Co., Ltd. 39
To Next Page
Loading...
Need help?
General