Huawei SUN2000-50KTL-ZHM3 User Manual page 47

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
PV modules connected in series in each PV string are of the same specifications.

The DC input voltage of the SUN2000 shall not exceed 1100 V DC under any

circumstance.
The polarities of electric connections are correct on the DC input side. The positive and

negative terminals of a PV string connect to corresponding positive and negative DC input
terminals of the SUN2000.
If polarity of the DC input power cable is reversed and the DC switch is ON, do not turn

off the DC switch immediately or remove 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 and remove the positive and negative connectors. Correct the
PV string polarity before reconnecting the PV string to the SUN2000.
The SUN2000 does not support power supplies other than PV strings. Since the output of

the PV string connected to the SUN2000 cannot be grounded, ensure that the PV module
output is well insulated to ground.
The SUN2000 cannot connect to the SUN2000-600W-P (long cable), SUN2000-450W-P,

or SUN2000-450W-P2 optimizers.
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 cable is not properly installed
or routed. In this case, an AC or DC short circuit may occur and damage the SUN2000.
The caused device damage is not covered under any warranty.
Figure 5-12 DC input terminals
When the DC input is not fully configured, the DC input terminals must meet the following
requirements:
1.
2.
Number
of PV
Strings
1
3
5
Issue 01 (2022-07-29)
Distribute the DC input power cables evenly over four MPPT circuits, and connect them
preferentially through MPPT1 and MPPT4.
Maximize the number of connected MPPT circuits.
Terminal Selection
PV1
PV1, PV3 and PV7
PV1, PV2, PV3, PV5 and
PV7
Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connections
Number
Terminal Selection
of PV
Strings
2 PV1 and PV7
4 PV1, PV3, PV5 and PV7
6 PV1, PV2, PV3, PV5, PV7
and PV8
40