● Ensure that the PV module output is well insulated to ground.
● The PV strings connecting to the same MPPT circuit should use the same model
and quantity of PV modules.
● The SUN2000 does not support full parallel connection for PV strings (full
parallel connection: PV strings connect to one another in parallel outside the
SUN2000 and then connect to it separately).
● The SUN2000 does not support Y-branch PV connectors.
● 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.
Terminal Description
The SUN2000 provides 28 DC input terminals, which are controlled by its two DC
switches. DC SWITCH 1 controls the DC input terminals PV1–PV14 and DC SWITCH
2 controls the DC input terminals PV15–PV28.
Figure 5-14 DC terminals controlled by DC SWITCH 1
SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual 5 Electrical Connections
Issue 07 (2023-06-30) Copyright © Huawei Technologies Co., Ltd. 55
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