Huawei SUN2000 Series User Manual page 44

Ensure that the following conditions are met. Otherwise, the SUN2000 may be damaged, or
even a fire could happen.

PV modules connected in series in each PV string are of the same specifications.

The open-circuit voltage of each PV string is always lower than or equal to 1100 V DC.

The maximum short-circuit current of each PV string must be lower than or equal to 15 A.

The DC input power cable is correctly connected. The positive and negative terminals of a
PV module are connected to corresponding positive and negative DC input terminals of
the SUN2000.

If the DC input power cable is reversely connected, do not operate the DC switch and
positive and negative connectors. Wait until the solar irradiance declines at night and the
PV string current reduces to below 0.5 A, and then turn off the DC switch. Remove the
positive and negative connectors to correct the polarity.
 Because the output of the PV string connected to the SUN2000 cannot be grounded,
ensure that the PV module output is insulated to ground.

The PV strings connecting to the same MPPT circuit should contain PV modules of the
same model and quantity.

During the installation of PV strings and the SUN2000, the positive or negative terminals
of PV strings may be short-circuited to ground if power cables are not properly installed or
routed. An AC or DC short circuit may occur and damage the device when the SUN2000
is operating. The caused device damage is not covered under any warranty.
Terminal Description
Figure 5-11 Terminals
(1) DC input terminals
Issue 02 (2019-04-30) Copyright © Huawei Technologies Co., Ltd.
SUN2000-(3KTL-10KTL)
(2) Battery terminals
User Manual
Page 44 of 81