Ensure that the following conditions are met. Otherwise, the SUN2000 will be
damaged, or even become a re hazard.
● The open-circuit voltage of each PV string is always lower than or equal to
1100 V DC.
● The positive and negative terminals of a PV string are connected to
corresponding positive and negative DC input terminals of the SUN2000.
During the installation of PV strings and the SUN2000, the positive or negative
terminals of PV strings may be short-circuited to ground if the power cables are
not properly installed or routed. In this case, an AC or DC short circuit may occur
and damage the SUN2000. The resulting device damage is not covered under any
warranty.
● Ensure that the PV module output is well insulated to ground.
● The PV strings connecting to the same MPPT circuit should contain the same
number of identical PV modules.
Terminal Description
The SUN2000 provides 12 DC input terminals, among which terminals 1 to 6 are
controlled by DC switch 1 and terminals 7 to 12 are controlled by DC switch 2.
Figure 5-15 DC terminals
Select DC input terminals according to the following rules:
1. Evenly distribute DC input power cables on the DC input terminals controlled
by the two DC switches.
2. Maximize the number of connected MPPT circuits.
SUN2000-(50KTL, 60KTL, 65KTL)-M0
User Manual 5 Electrical Connections
Issue 11 (2024-02-02) Copyright © Huawei Technologies Co., Ltd. 53
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