Huawei SUN2000-50KTL-NHM3 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-50KTL-NHM3
Quick Guide
Issue: 02
Part Number: 31500HQX
Date: 2023-01-10

1
1Overview
Copyright © Huawei Technologies Co., Ltd. 2023. All
rights reserved.
•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.
•Only qualified and trained electrical technicians are allowed to operate the device. Operation
personnel should understand the composition and working principles of the grid-tied PV
power system and local regulations.
•Before installing the device, read the user manual carefully to get familiar with product
information and safety precautions. Huawei shall not be liable for any consequences caused
by the violation of the storage, transportation, installation, and operation regulations
specified in this document and the user manual.
•Use insulated tools when installing the device. For personal safety, wear proper personal
protective equipment (PPE).
(1) LED indicators
(2) Host panel
(3
) Screws for fixing the awning
(4
) Hole for the DC switch locking screw
(5
) DC switch (DC SWITCH)
(6
) Smart Dongle port
(7
) Communications port (COM)
(8
) DC input terminals (PV1–PV8)
(9
) Ventilation valves
(10
) AC output port
(11
) Spot-check terminal connection box
(12) Ground point
(13) Fan

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).
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.
•Before installing the mounting bracket,
remove the security Torx wrench and set it
aside.
Position for binding the
security Torx wrench

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.
2. Install the solar inverter onto the
mounting bracket.
3. Tighten the security Torx screws on both
sides.
Secure the screws on the sides before connecting cables.

4
Preparations
4.1
4Connecting Cables
No.
Cable
Type
Specifications
1
PE cable
Single
-core outdoor copper-
core cable
Conductor cross
-sectional area ≥ 5.5 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 cable
•
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: 3.5–6
mm2
•
Cable outer diameter: 5.5–9 mm
4
(Optional) RS485
communications
cable
Two
-core outdoor shielded
twisted
pair
•
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
•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 Huawei'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
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.
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.
1. Remove the AC terminal box and install partition boards.
Reserved PE point
•To avoid damaging the rubber liner, do not route a cable with a crimped OT terminal directly
through it.
•The cable colors in figures are for reference only. Select appropriate cables according to the
local standards.

6
2. Connect the AC output power cable (using a four-core cable as an example).

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.
•For models of the crimping tool and removal wrench, use the recommended model or
contact your Amphenol dealer.
•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.
•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.

8
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
•The Smart Dongle is not provided in standard configuration.
•If your Smart Dongle is not equipped with a SIM card, prepare a standard SIM card (size: 25
mm x 15 mm) with the capacity greater than or equal to 64 KB.
•When installing the SIM card, determine its installation direction based on the silk screen
and arrow on the card slot.
•Press the SIM card in place to lock it, indicating that the SIM card is correctly installed.
•When removing the SIM card, push it inwards to eject it.
•For details about how to operate the 4G Smart Dongle SDongleA-03, see
SDongleA-03
Quick Guide (4G) .
•The quick guide is delivered with the Smart Dongle or can be obtained by scanning the QR
codes.

9
Smart Dongle port
Quick Guide
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.
When reinstalling the cover of the Smart Dongle,
ensure that the buckle springs back in place.

10
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 +
Reserved.
Connects
to the
RS485 signal
port on the
power grid
scheduling
power meter.
8
DIN1
Reserved.
–
9
485B2
RS485
differential
signal
–
10
DIN2
11
–
–
–
12
DIN3
13
GND
GND
–
14
DIN4
15
DIN5
OVGR
–
16
GND

11
Scenarios Where No Signal Cable Is Connected
If no signal cable is required for the SUN2000, use waterproof plugs to block the wiring holes on
the signal cable connector and connect the signal cable connector to the communications port
on the SUN2000 to improve the waterproof performance of the SUN2000.
(Optional) Connecting the Signal Cable
1. Connect the signal cable to the signal connector.

12
2. Connect the signal cable connector to the communications port.
Communications
port (COM)
If two or more solar inverters are cascaded, install the RS485 communications cable.
•Connect the RS485 communications cable to the solar inverter.

13
6System Power-On
Before turning on the AC switch between the solar inverter and the power grid, check that the
AC voltage is within the specified range using a multimeter set to the AC position.
1. Turn on the AC switch between the solar inverter and the power grid.
2. Turn on the DC switch at the bottom of the solar inverter.
3. Observe the LED indicators to check the operating status of the solar inverter.
Category
Status (Blinking Slowly: On for 1s and then Off for
1s; Blinking Fast: On for 0.2s and then Off for 0.2s)
Description
Running
indicator
–
Steady green
Steady green
The solar inverter is operating in
grid
-tied mode.
Blinking green slowly
Off
The DC is on and the AC is off.
Blinking green slowly
Blinking green slowly
Both the DC and AC are on, and
the solar inverter is not supplying
power to the power grid.
Off
Blinking green slowly
The DC is off and the AC is on.
Off
Off
Both the DC and AC are off.
Blinking red fast
–
DC environment alarm
–
Blinking red fast
AC environment alarm
Steady red
Steady red
Fault
Communi
cations
indicator
–
Blinking green fast
Communication is in progress.
Blinking green slowly
Mobile phone access
Off
No communication
Note: If LED1, LED2, and LED3 are steady red, the solar inverter is faulty and needs to be replaced.
No.
Acceptance Criteria
1
The solar inverter is installed correctly and securely.
2
The cables are routed properly as required by the customer.
3
The communications expansion module is installed correctly and securely.
4
Cable ties are evenly distributed and no burr exists.
5
The PE cable is connected correctly and securely.
6
The DC switch and all the switches connected to the solar inverter are set to the OFF
position.
7
The AC output power cable, DC input power cables, and signal cable are connected
correctly and securely.
8
Unused terminals and ports are locked by watertight caps.
9
The installation space is proper, and the installation environment is clean and tidy.
5Verifying the Installation

14
7System Commissioning (FusionSolar APP)
•Install the FusionSolar app (5.7.001 or later).
•The screenshots in this document correspond to app version should be 5.7.001.
The installer can be registered
using a mobile number (only in
China) or an email address. The
two registration modes are
automatically switched based on
the server settings.
Run the FusionSolar app. If no account and password are created, tap No account, select I'm an
installer, and enter the registration information.
Downloading the App
(Optional) Registering an Installer Account
•Method 2: Search for FusionSolar on Huawei
AppGallery and download the latest installation
package.
•Method 1: Access https://solar.huawei.com using the mobile phone browser and download
the latest installation package.
FusionSolar
•Method 3: Scan the following QR code and
download the latest installation package.

15
Creating a PV Plant and a User
For details about how to use
the site deployment wizard, see
FusionSolar App Quick Guide.
1. Access Device commissioning.
Scenario 1: Your phone is not
connected to the Internet.
Scenario 2: Your phone is
connected to the Internet.
When your phone is
connected to the
Internet, Device
commissioning is not
displayed after you
tap ....
Device Commissioning

16
8System Commissioning (SmartLogger Web)
8.1
1. The operating system of Windows 7 or later is supported.
2. The WebUI snapshots are for reference only, and the actual display prevails.
Preparations and WebUI Login
1. Connect the network cable between the network port on the PC and the SmartLogger.
2. Set the IP addresses of the PC and SmartLogger in the same network segment.
Port
IP Settings
SmartLogger
Default Value
PC Setting Example
LAN port
IP address
192.168.8.10
192.168.8.11
Subnet mask
255.255.255.0
255.255.255.0
Default gateway
192.168.8.1
192.168.8.1
WAN port
IP address
192.168.0.10
192.168.0.11
Subnet mask
255.255.255.0
255.255.255.0
Default gateway
192.168.0.1
192.168.0.1
2. Connect to the solar inverter WLAN and log in as installer to access the device commissioning
screen.
When the IP address of the WAN port is on the 192.168.8.1–192.168.8.255 network segment,
the IP address of the LAN port is automatically switched to 192.168.3.10, and the default
gateway is 192.168.3.1. If the connection port is a LAN port, adjust the network configuration
of the PC accordingly.
SUN2000-XXKTL-XX

17
8.2
Parameter
Description
Language
Set this parameter as required.
User name
Select
admin.
Password
•
The initial password is
Changeme. Use the initial
password upon first power on
and change it immediately after
login. To ensure account
security, change the password
periodically and keep the new
password in mind. Not changing
the initial password may cause
password disclosure. A
password left unchanged for a
long period of time may be
stolen or cracked. If a password
is lost, devices cannot be
accessed. In these cases, the
user is liable for any loss caused
to the PV plant.
•
If you enter wrong passwords
for five consecutive times within
5 minutes, your account will be
locked out. Try again 10
minutes later.
3. Set LAN parameters.
•If the SmartLogger is connected to a
local area network (LAN) and a proxy
server has been set, you need to cancel
the proxy server settings.
•If the SmartLogger is connected to the
Internet and the PC is connected to the
LAN, do not cancel the proxy server
settings.
a. Open Internet Explorer.
b. Choose Tools > Internet Options.
c. Click the Connections tab and then click
LAN settings.
d. Clear Use a proxy server for your LAN.
e. Click OK.
Commissioning Through Deployment Wizard
1. Enter https://XX.XX.XX.XX in the address
box of the browser (XX.XX.XX.XX is the
default IP address of the SmartLogger). If
you log in to the WebUI for the first time,
a security risk warning is displayed. Click
Continue to this website.
2. Select a User Name to log in.

18
9FAQ: How Do I Reset the Password?
3. Click Deployment Wizard and set parameters as prompted. Click Skip for unused devices.
1. Check that the AC and DC power supplies to the solar inverter are connected simultaneously,
and that the and indicators are steady green or blink slowly for more than 3 minutes.
2. Turn off the AC switch, set the DC switch at the bottom of the solar inverter to OFF, and wait
until all indicators on the solar inverter panel turn off.
3. Complete the following operations within 4 minutes:
a. Wait until the indicator blinks.
b. Obtain the initial WLAN hotspot name (SSID) and initial password (PSW) from the label
on the side of the solar inverter to connect to the app.
c. On the login page, set a new login password and log in to the app.
You are advised to reset the password in the morning or at night when the solar irradiance is
low.
4. Wait until the three indicators on the inverter panel blink green quickly and then blink
red quickly, indicating that the password has been restored.
5. Reset the password within 10 minutes. (If no operation is performed within 10
minutes, all parameters of the solar inverter remain the same as those before the
reset.)
a. Turn on the AC switch and wait for about 90s or until the inverter indicator blinks.
b. Turn off the AC switch and wait about 30s or until all LED indicators on the inverter panel
turn off.
c. Turn on the AC switch and wait for about 30s or until all LED indicators on the inverter
panel blink and then turn off after about 30s.

Huawei Technologies Co., Ltd.
Huawei Industrial Base, Bantian, Longgang
Shenzhen 518129 People's Republic of China
solar.huawei.com