Huawei SUN2000 M5 Series User Manual page 44

SUN2000-(12KTL-25KTL)-M5 Series
User Manual
Ensure that the following conditions are met. Otherwise, the inverter may be
damaged, or even a fire may occur.
● PV modules connected in series in each PV string are of the same specifications.
● The maximum open-circuit voltage of each PV string must be less than or
● The maximum short-circuit current of each PV string must be less than or equal
● PV strings must be connected in the correct polarity. The positive and negative
● If the DC input power cables are reversely connected, do not operate DC
● The output of the PV strings connected to the inverter cannot be grounded.
● PV modules and optimizers in the PV strings connecting to the same MPPT
● If power cables are not properly installed or routed during the installation of PV
Terminal Description
Figure 5-4 DC input terminals
Issue 03 (2023-02-15)
WARNING
equal to 1100 V DC.
to 20 A.
terminals of a PV string connect to the corresponding positive and negative DC
input terminals of the inverter, respectively.
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.
NO TICE
Ensure that the PV output is well insulated to ground.
must be of the same model and quantity.
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.
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5 Electrical Connections
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