Huawei SUN2000-50KTL-ZHM3 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(50KTL-ZHM3, 50KTL-M3)
Quick Guide
Issue: 05
Part Number: 31500HTB
Date: 2023-05-30

1
1Overview
Copyright © Huawei Technologies Co., Ltd. 2023. All
rights reserved.
•Before installing the equipment, read the user manual carefully to get familiar with
product information and safety precautions. The product warranty does not cover
equipment damage caused by failure to follow the storage, transportation, installation,
and usage guidelines specified in this document and the user manual. Log in to the
technical support website (https://support.huawei.com/enterprise) to view the user manual
and safety precautions.
•The information in this document is subject to change without notice. Every effort has been
made in the preparation of this document to ensure accuracy of the contents, but all
statements, information, and recommendations in this document do not constitute a
warranty of any kind, express or implied.
•The Danger, Warning, Caution, and Notice statements described in this document do not
cover all the safety precautions. You also need to comply with relevant international,
national, or regional standards and industry practices.
•Only qualified professionals or trained personnel are allowed to perform operations on the
equipment. Operation personnel should understand the system, its working principles, and
relevant national/regional standards.
•During operations, use dedicated insulated tools and wear personal protective equipment,
such as protective clothing, insulated shoes, goggles, safety helmets, and insulated gloves.

2
2Installation Requirements
Dimensions
Angle Space
If inverters are installed in a place with abundant vegetation, in addition to routine weeding,
harden the ground underneath the inverters using cement or gravel (recommended area: 3 m x
2.5 m).
(1) LED indicators
(2) Host panel
(3) Screws for fixing the awning
(4) Communications port (COM)
(5) Hole for the DC switch locking screw
(6) DC switch (DC SWITCH)
(7) Smart Dongle port (4G/WLAN
-FE)
(8)
DC input terminals (PV1–PV8)
(9
) Ventilation valves
(10) AC output port
(11) Ground point
(12) Fan
3Installing a Solar Inverter
•M12x40 bolt assemblies are supplied with the solar inverter. If the bolt length does not meet
the installation requirements, prepare M12 bolt assemblies by yourself and use them
together with the supplied M12 nuts.
•This quick guide describes how to install a solar inverter on a support. For details about
wall-mounted installation, see the user manual.

3
1. Install the mounting bracket.
Moving the Solar Inverter
It is recommended that anti-rust measures be taken on the positions for drilling holes.
(Optional) Installing the DC
Switch Locking Screw
Position for binding the
security Torx wrench
•For models used in Australia, install the DC switch locking screw according to local
standards. The DC switch locking screw is delivered with the solar inverter to prevent the
solar inverter from being started by mistake.
•Before installing the mounting bracket, remove the security Torx wrench and set it aside.

4
2. Install the solar inverter onto the
mounting bracket.
3. Tighten the security Torx screws on both
sides.
Preparations
4.1
4Connecting Cables
Secure the screws on the sides before connecting cables.
•Do not connect loads between the inverter and the AC switch that directly connects to the
inverter. Otherwise, the switch may trip by mistake.
•If an AC switch is used with specifications beyond local standards, regulations, or the
Company's recommendations, the switch may fail to turn off in a timely manner in case of
exceptions, causing serious faults.
Each inverter must be equipped with an AC output switch. Multiple inverters cannot connect to
the same AC output switch.
•To ensure that the inverter can be safely disconnected from the power grid when an
exception occurs, connect an AC switch to the AC side of the inverter. Select an appropriate
AC switch in accordance with local industry standards and regulations.
•The cable specifications must comply with local standards. Connect cables in accordance with
local installation laws and regulations.
•Before connecting cables, ensure that the DC switch of the solar inverter and all the switches
connected to it are set to OFF. Otherwise, the high voltage produced by the solar inverter
may cause electric shocks.

5
No.
Cable
Type
Specifications
1
PE cable
Single
-core outdoor copper-
core cable
Conductor cross
-sectional area ≥ 16 mm2
2
AC output power
cable
Outdoor copper
-
core/aluminum
-core cable
•
Conductor cross-sectional area: 25–50
mm2outdoor copper-core cable or 35
–
50 mm2outdoor aluminum-core cablea
•
Cable outer diameter: 16–38 mm
3
DC input power
cable
Common outdoor PV cable in
the industry (recommended
model: PV1
-F)
•
Conductor cross-sectional area: 4–6
mm2
•
Cable outer diameter: 5.5–9 mm
4
(Optional) RS485
communications
cable
Two
-core outdoor shielded
twisted pair (recommended
model: DJYP2VP2
-2x2x0.75)
•
Conductor cross-sectional area: 0.2–1
mm2
•
Cable outer diameter: 4–11 mm
5
AC circuit
breaker
Recommended: three
-phase
AC circuit breaker
Rated voltage ≥
500 V AC
Rated
current: 125 A
Note a: Five
-core cables with a cross-sectional area of 5 x 35 mm2or 5 x 50 mm2are not
supported.
Connecting a PE Cable
4.2
•The PE point at the AC output port is used
only as a PE equipotential point, not a
substitute for the PE point on the
enclosure.
•It is recommended that silica gel or paint
be applied around the ground terminal
after the PE cable is connected.
Do not connect the neutral wire to the
enclosure as a PE cable. Otherwise, electric
shocks may occur.
Reserved PE point
Installing the AC Output Power Cable
4.3
•Use a socket wrench and extension rod to connect the AC power cable. The extension rod
must be longer than 100 mm.
•Sufficient slack should be provided in the PE cable to ensure that the last cable bearing the
force is the PE cable when the AC output power cable bears pulling force due to force
majeure.
•Do not install third-party devices in the AC connection box.
•You need to prepare M8 OT terminals by yourself.

6
1. Remove the AC terminal box and install partition boards.
2. Connect the AC output power cable (using a five-core cable as an example).
•To avoid damaging the rubber liner, do not route a cable with a crimped OT terminal directly
through it.
•It is recommended that the length of the PE cable to be stripped be 15 mm longer than the
length of other cables.
•The cable colors in figures are for reference only. Select appropriate cables according to the
local standards.
•A three-core AC output power cable can be connected similarly. The three-core cable (L1, L2,
and L3) is not connected to the neutral wire or PE wire.
•A four-core or five-core AC output power cable can be connected similarly. The four-core
cable (L1, L2, L3, and PE) is not connected to the N wire, and the four-core cable (L1, L2, L3,
and N) is not connected to the PE wire.

7
Installing DC Input Power Cables
4.4
When the DC input is not fully configured, the DC input terminals must meet the following
requirements:
•Evenly distribute DC input power cables to the four MPPTs. MPPT 1 and MPPT 4 are
preferred.
•Maximize the number of connected MPPTs.
Number of
PV Inputs
Terminal Selection
Number of
PV Inputs
Terminal Selection
1
PV1
2
PV1, PV7
3
PV1, PV3, PV7
4
PV1, PV3, PV5, PV7
5
PV1, PV2, PV3, PV5, PV7
6
PV1, PV2, PV3, PV5, PV7, PV8
7
PV1, PV2, PV3, PV4, PV5, PV7,
PV8
8
PV1, PV2, PV3, PV4, PV5, PV6, PV7,
PV8
•Use the positive and negative Amphenol Helios H4 metal terminals and DC connectors
supplied with the solar inverter. Using incompatible positive and negative metal terminals
and DC connectors may result in serious consequences. The caused device damage is not
covered under any warranty.
•You are advised to use the H4TC0003 (Amphenol) crimping tool and do not use it with the
positioning block. Otherwise, the metal terminals may be damaged. The H4TW0001
(Amphenol) open-end wrench is recommended.
•Ensure that the PV module output is well insulated to ground.
•The DC input voltage of the SUN2000 shall not exceed 1100 V DC under any circumstance.

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•Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
•If a DC input power cable is reversely connected and the DC switch is turned on, do not
operate on the DC switch or the positive/negative connectors immediately. Otherwise, the
device may be damaged. The caused device damage is not covered under any warranty. Wait
until the night when solar irradiance declines and the PV string current drops to below 0.5 A.
Then set the DC switch to the OFF position, remove the positive and negative connectors, and
correct the polarity of the DC input power cable.
1. Connect the DC power cables.
Positive connector
Negative
connector
Positive metal terminal
Negative metal terminal
Ensure that the cable
cannot be pulled out
after being crimped.
Click
Click
Ensure that the
cables are correctly
connected.
Use the wrench shown
in the figure to tighten
the locking nut. When
the wrench slips
during the
tightening,
the locking
nut has been
tightened.
(Optional) Installing the Smart Dongle
4.5
Smart Dongle port (4G/WLAN-FE)
•The Smart Dongle is not provided in
standard configuration.
•For details about how to install the
Smart Dongle, see the Smart Dongle
quick guide of the corresponding model.
The quick guide is delivered with the
Smart Dongle.

9
COM Port Pin Definitions
No.
Definiti
on
Function
Description
No.
Definitio
n
Function
Description
1
485A1
-
1
RS485
differential
signal +
Used to cascade
inverters or
connect to the
SmartLogger.
2
485A1
-2
RS485
differential
signal +
Used to cascade
inverters or
connect to the
SmartLogger.
3
485B1
-
1
RS485
differential
signal
–
4
485B1
-2
RS485
differential
signal
–
5
PE
Ground point
on the shield
layer
–
6
PE
Ground
point on the
shield layer
–
7
485A2
RS485
differential
signal +
Connects to the
RS485 signal
port on the
power grid
scheduling
power meter.
8
DIN1
Dry contact
for power
grid
scheduling
–
9
485B2
RS485
differential
signal
–
10
DIN2
11
–
–
–
12
DIN3
13
GND
GND
–
14
DIN4
15
DIN5
Rapid
shutdown/NS
protection/OV
GR
Supports
functions such
as rapid
shutdown, NS
protection, and
OVGR.
16
GND
Installing the Signal Cable
4.6
•When laying out the signal cable, separate it from the power cable and keep it away from
strong interference sources to avoid strong communication interference.
•Ensure that the protective layer of the cable is inside the connector, that excess core wires
are cut off from the protection layer, that the exposed core wire is totally inserted into the
cable hole, and that the cable is connected securely.