SUN2000-(8KTL-20KTL)-M2 Quick Guide

SUN2000-(8KTL-20KTL)-M2
Quick Guide


Issue: 10
Part Number: 31500BCA
Date: 2025-05-30

HUAWEI TECHNOLOGIES CO., LTD.
1. The information in this document is subject to change due to version
upgrades or other reasons. 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. You can download this document
by scanning the QR code.
2. Before installing the device, read the user manual carefully to get familiar with product
information and safety precautions.
3. 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.
4. Before installing the device, check that the package contents are intact and complete against
the packing list. If any damage is found or any component is missing, contact your dealer.
5. Use insulating tools when installing the device. For personal safety, wear proper personal
protective equipment (PPE).
6. 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.
1 Product Description Description


(1) LED (2) Front panel
(3) Hanging kit (4) Heat sink
(5) Ventilation valve (6) Ground screw
(7) AC output port (AC) (8) Communications port (COM)
(9) Smart Dongle port (GPRS/4G/WLAN-FE) (10) DC input terminals (PV4+/PV4–)
(11) DC input terminals (PV3+/PV3–) (12) DC input terminals (PV2+/PV2–)
(13) DC input terminals (PV1+/PV1–) (14) DC switch (DC SWITCH)
(15) Screw hole for the DC switch (for Australia only)

Copyright © Huawei Technologies Co., Ltd.2025. All
1 rights reserved.
2 Installing the Equipment
2.1 Installation Requirements

Angle Space


Dimensions


Two M6 screw holes are reserved on both left and right sides of the inverter for installing an
awning.


2
2.2 Installing the Inverter
Moving an Inverter


When drilling holes, avoid the water pipes
and power cables buried in the wall.

1. Install the mounting bracket.


• M6x60 expansion bolts are delivered with the inverter. If the length and number of the bolts
do not meet installation requirements, prepare M6 stainless steel expansion bolts by yourself.
• The expansion bolts delivered with the inverter are used for solid concrete walls. For other
types of walls, prepare bolts by yourself and ensure that the wall meets the load bearing
requirements of the inverter.
• Loosen the nuts, flat washers, and spring washers of the two expansion bolts.

Level


2. (Optional) Install the screw for locking the DC switch.

• The screws for DC switches are delivered with solar inverters. According to Australian
standards, the screws are used to secure DC switches (DC SWITCH) to prevent them from
being turned on by mistake.
• For the model used in Australia, perform this step to meet the local standards.


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3. Install the inverter on the mounting bracket. 4. (Optional) Install an anti-theft lock.


Prepare an anti-theft lock suitable for the lock hole diameter (Ф8 mm) and ensure that the lock
can be installed successfully. An outdoor waterproof lock is recommended.

3 Electrical Connections
3.1 Preparing for Installation


• 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.
• Connect cables in accordance with the local installation laws and regulations.
• Before connecting cables, ensure that the DC switch on the inverter and all the switches
connecting to the inverter are set to OFF. Otherwise, the high voltage of the inverter may
result in electric shocks.


4
No. Item Type Specifications
1 PE cable Single-core Conductor cross-sectional area:
outdoor copper • ≥ 6 mm2 (SUN2000-8KTL-M2/SUN2000-
cable 10KTL-M2/SUN2000-12KTL-M2)
• ≥ 10 mm2 (SUN2000-15KTL-M2/SUN2000-
17KTL-M2/SUN2000-20KTL-M2)
2 AC output power cable Outdoor copper Conductor cross-sectional area:
cable • 6–16 mm2 (SUN2000-8KTL-M2/SUN2000-
10KTL-M2/SUN2000-12KTL-M2)
• 10–16 mm2 (SUN2000-15KTL-M2/SUN2000-
17KTL-M2/SUN2000-20KTL-M2)
Cable outer diameter: 11–26 mm
3 DC input power cable Standard outdoor • Conductor cross-sectional area: 4–6 mm2
PV cable in the • Cable outer diameter: 5.5–9 mm
industry
4 (Optional) RS485 Two-core outdoor • Conductor cross-sectional area: 0.2–1 mm2
communications cable shielded twisted (0.5 mm2 is recommended)
5 (Optional) RS485 pair cable • Cable outer diameter: 4–11 mm
power meter signal
cable
6 (Optional) Rapid
shutdown switch signal
cable
7 (Optional) Grid Five-core outdoor
scheduling signal cable cable
8 AC switch Recommended: Rated voltage ≥ 415 V AC
three-phase AC Rated current:
circuit breaker • 25 A (SUN2000-8KTL-M2, SUN2000-10KTL-
M2, SUN2000-12KTL-M2)
• 40 A (SUN2000-15KTL-M2, SUN2000-
17KTL-M2, SUN2000-20KTL-M2)


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3.2 Installing the PE Cable

Do not connect the neutral wire to the enclosure as a PE cable. Otherwise, electric shocks may
occur.


• The PE point at the AC output port is used only as a PE equipotential point, and cannot
substitute for the PE point on the enclosure.
• It is recommended that silica gel or paint be used around the ground terminal after the PE
cable is connected.

3.3 Installing the AC Output Power Cable


• Ensure that the protection layer of the AC output power cable is inside the connector, the
core wires are totally inserted into the cable hole, and the cable is connected securely. Failing
to do so may cause device malfunction or damage.
• The hex key is delivered with the inverter and bound to the hanging kit at the bottom of the
inverter.
1. Connect the AC output power cable to the AC connector.
Hex Key

Hex key

Hanging kit


Stripping Requirements


6
Five-Core Cable (L1, L2, L3, N, and PE)

• This section describes how to connect a five-core AC output power cable to an AC connector.
• 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.
• Strip the insulation layers of the AC output power cable by the recommended length (12–16
mm) to ensure that the cable conductors are completely inside the conductor insertion points
and no insulation layer is pressed into the conductor insertion points. Tighten the cable
conductors to a torque of 1.5 N·m. Otherwise, the device may fail to run properly or be
damaged during operation.


Click

2. Connect the AC connector to the AC output port.


AC output port (AC)


3. Check the route of the AC output power cable.


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3.4 Installing the DC Input Power Cable


1. Ensure that the PV module output is well insulated to ground.
2. Use the Staubli MC4 positive and negative 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 warranty.
3. The DC input voltage of the SUN2000 shall not exceed 1080 V DC under any circumstance.
4. Before installing the DC input power cable, label the cable polarities to ensure correct cable
connections.
5. If the DC input power cable is reversely connected, do not operate the DC switch as well as
positive and negative connectors immediately. Failing to do so may cause device damage,
which 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 polarities of the DC input
power cable.

1. Assemble DC connectors.

Positive metal terminal Positive connector


PV-CZM-22100/19100 (Staubli)
Ensure that the cable cannot Negative
Negative metal terminal be pulled out after being connector Click
crimped.


Ensure that cable Use the wrench
polarities are correct. shown in the figure
to tighten the locking
nut. When the
wrench slips during
the tightening, the
PV-MS-HZ
locking nut has been
Open-end Wrench
tightened.
(Staubli)


2. Connect DC input power cables.


DC input terminals


8
Pull the DC input power cable
back to ensure that it is
connected securely.

Click


3.5 (Optional) Installing the Smart Dongle

• If WLAN-FE communication is used, install a WLAN-FE Smart Dongle (SDongleA-05).
• If 4G communication is used, install a 4G Smart Dongle (SDongleB-06).
• You need to purchase the Smart Dongle by yourself.

Smart Dongle port (GPRS/4G/WLAN-FE)


WLAN-FE Smart Dongle (FE Communication)

You are advised to use a CAT 5E outdoor shielded network cable (outer diameter < 9 mm; internal
resistance ≤ 1.5 Ω/10 m) and shielded RJ45 connectors.


GPRS/4G/WLAN-FE


9
4G Smart Dongle (4G Communication)


• 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.
• Install the SIM card in the arrow direction.
• When reinstalling the cover of the Smart Dongle, ensure that the buckle springs back in
place (you can hear a click).


• For details about how to operate the WLAN-FE Smart Dongle SDongleA-05, see SDongleA-05
Smart Dongle Quick Guide (WLAN-FE).
• For details about how to operate the 4G Smart Dongle SDongleB-06, see SDongleB-06 Quick
Guide (4G).
• The quick guide is delivered with the Smart Dongle. You can download them by scanning the
QR code below.


WLAN-FE 4G


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3.6 (Optional) Installing the Signal Cable


• Not all inverter models are delivered with the signal cable connector.
• 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 protection layer of the cable is inside the connector, surplus core wires are cut
off from the protection layer, the exposed core wire is totally inserted into the cable hole, and
that the cable is connected securely.
• If the Smart Dongle is configured, you are advised to install the Smart Dongle before
connecting the signal cable.

Communications Port Pin Definition


Pin Definition Function Description Pin Definition Function Description
1 485A1-1 RS485 Used to cascade 2 485A1-2 RS485 Used to cascade
differentia inverters or connect differential inverters or
l signal+ to the RS485 signal signal+ connect to the
3 485B1-1 port on the 4 485B1-2 RS485 signal port
RS485 SmartLogger RS485 on the
differentia differential SmartLogger
l signal– signal–

5 PE Shielding N/A 6 PE Shielding N/A
ground ground
7 485A2 RS485 Used to connect to 8 Dry contact N/A
differentia an RS485 signal DIN1 interface for
l signal+ port on a Smart grid
9 485B2 Power Sensor for 10 scheduling
RS485 export limitation
differentia DIN2
l signal–

11 N/A N/A N/A 12 DIN3
13 GND GND Used to connect to 14 DIN4
the rapid shutdown
15 DIN5 Rapid 16
DI signal port or
shutdown
serve as a port for
signal+ GND
the signal cable of
the NS protection.

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Smart Dongle Networking Scenario


• In the Smart Dongle networking scenario, the SmartLogger cannot be connected.
• Smart Power Sensor is necessary for export limitation. Select the Smart Power Sensor
according to the actual project.

SmartLogger Networking Scenario


• In the SmartLogger networking scenario, the Smart Dongle cannot be connected.
• A maximum of 80 devices can connect to a single SmartLogger, such as inverters, Smart
Power sensor, and EMI. You are advised to connect fewer than 30 devices to each RS485 route.
• The Smart Power Sensor is necessary for export limitation. Select the Smart Power Sensor
according to the actual project.
• To ensure the system response speed, you can connect the Smart Power Sensor to a separate
COM port.


12
(Optional) Installing the RS485 Communications Cable (Inverter Cascading)

1. Connect the signal cable to the signal cable connector.


2. Connect the signal cable connector to the communication port.


Communications port (COM)


13
(Optional) Installing the Smart Power Sensor Signal Cable

1. Connect the signal cable to the signal cable connector.


2. Connect the signal cable connector to the communication port.


Communications port (COM)


14
(Optional) Installing the Grid Scheduling Dry Contact Signal Cable

1. Connect the signal cable to the signal cable connector.


2. Connect the signal cable connector to the Communication port.


Communications port (COM)


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4 Verifying Installation

No. Acceptance Criteria

1 The inverter is installed correctly and securely.

2 Cables are routed properly as required by the customer.

3 The Smart Dongle is installed correctly and securely.

4 Cable ties are evenly distributed and no burr exists.

5 The PE cable is connected correctly, securely, and reliably.

6 The DC switch and all the switches connected to the inverter are set to the OFF position.

7 The AC output power cable, DC input power cable, and signal cable are connected
correctly, securely, and reliably.

8 Unused terminals and ports are locked by watertight caps.

9 The installation space is proper, and the installation environment is clean and tidy.
5 Powering On the System


Before turning on the AC switch between the inverter and the power grid, use a multimeter set
to the AC position to check that the AC voltage is within the specified range.

1. Turn on the AC switch between the inverter and the power grid.
2. (Optional) Remove the screw for locking the DC switch.


3. If there is a DC switch between the PV string and the inverter, turn on the DC switch.
4. Turn on the DC switch at the bottom of the inverter.


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5. Observe the LEDs to check the operating status of the inverter.

Type Status (Blinking at long intervals: On Meaning
for 1s and then Off for 1s; Blinking
at short Intervals: On for 0.2s and
then Off for 0.2s)
Running N/A
indication
Steady green Steady green The solar inverter is operating in grid-tied
mode.
Blinking green Off The DC is on and the AC is off.
at long
intervals
Blinking green Blinking green at Both the DC and AC are on, and the solar
at long long intervals inverter is not exporting power to the
intervals power grid.
Off Blinking green at The DC is off and the AC is on.
long intervals
Off Off Both the DC and AC are off.
Blinking red at N/A There is a DC environmental alarm, such
short intervals as an alarm indicating that High String
Input Voltage, String Reverse Connection,
or Low Insulation Resistance.
N/A Blinking red at There is an AC environmental alarm, such
short intervals as an alarm indicating Grid Undervoltage,
Grid Overvoltage, Grid Overfrequency, or
Grid Underfrequency.
Steady red Steady red Fault.
Communication N/A
indication
Blinking green at short intervals Communication is in progress.

Blinking green at long intervals A mobile phone is connected to the solar
inverter.
Off There is no communication.
Device N/A
replacement
indication
Steady red Steady red Steady red The solar inverter hardware is faulty. The
solar inverter needs to be replaced.


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6. (Optional) Observe the LED to check the operating status of the Smart Dongle.
WLAN-FE Smart Dongle

LED Description
Color Status
Yellow (blinking Steady on The Dongle is secured and
green and red powered on.
simultaneously)
Red Blinking at short The parameters for connecting
intervals (on for 0.2s to the router are to be set.
LED and then off for 0.2s)
Green Blinking at long Connecting to the router
intervals (on for 0.5s
and then off for 0.5s)
Green Steady on Successfully connected to the
management system.
Green Blinking at short The inverter is communicating
intervals (on for 0.2s with the management system
and then off for 0.2s) through the Dongle.

4G Smart Dongle

LED Description
Color Status
Yellow (blinking Steady on The Dongle is secured and
green and red powered on.
simultaneously)
Green Blinking in a 2-second Dialing (duration < 1 min)
cycle (on for 0.1s and
then off for 1.9s)
Green Blinking at long intervals The dial-up connection is set up
LED (on for 1s and then off successfully (duration < 30s).
for 1s)
Green Steady on Successfully connected to the
management system.
Green Blinking at short The inverter is communicating
intervals (on for 0.2s and with the management system
then off for 0.2s) through the Dongle.
6 Commissioning

• The screenshots are for reference only. The actual screens may vary.
• Obtain the initial password for connecting to the solar inverter WLAN from the label on the
side of the solar inverter.
• To ensure account security, change the password periodically and keep the new password in
mind. Not changing the 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.
• Before maintaining the optimizers and PV strings, turn off the AC switch and set the DC
switch to OFF. Otherwise, the PV strings may be energized, resulting in electric shocks.


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6.1 Downloading the App
Method 1: Search for FusionSolar on Huawei AppGallery and download the latest installation
package.
Method 2: Access https://solar.huawei.com using the mobile phone browser and download the
latest installation package.


Method 3: Scan the following QR code and download the latest installation package.


FusionSolar
6.2 (Optional) Registering an Installer Account

If you already have an installer account, skip this step.

Creating the first installer account will generate a domain named after the company.


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xxx To create multiple
Installer installer accounts for a
company, log in to the
FusionSolar App and tap
Add User to create an
installer account.


6.3 Creating a PV Plant and a Plant Owner

• In the quick settings, the grid
code is set to N/A by default
(automatic startup is not
supported). Set the grid code
based on the area where the
PV plant is located.
• For details, see the
FusionSolar App Quick Guide.
You can scan the QR code to
download the quick guide.


6.4 Setting the Physical Layout of Smart PV Optimizers

• If Smart PV Optimizers are configured for PV strings, ensure that the Smart PV Optimizers have
been successfully connected to the solar inverter before performing the operations in this
section.
• The PV strings connecting to the same MPPT route should contain the same number and
model of PV modules or Smart PV optimizers.
• Check that the SN labels of Smart PV Optimizers are correctly attached to the physical layout
template.
• Take and save a photo of the physical layout template. Place the template on a flat surface.
Keep your phone parallel to the template and take a photo in landscape mode. Ensure that the
four positioning points in the corners are in the frame. Ensure that each QR code is attached
within the frame.
• For details about the physical layout of Smart PV Optimizers, see FusionSolar App Quick Guide.

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Scenario 1: Setting on the FusionSolar Server Side (Solar Inverter Connected to
the Management System)
1. Tap the plant name on the Home screen to access the plant screen. Select layout, tap
and upload the physical layout template photo of the PV plant as prompted.


2. Log in to https://intl.fusionsolar.huawei.com to access the WebUI of the FusionSolar Smart PV
Management System. On the Home page, click the plant name to go to the plant page.
Select layout. Choose Generate layout, and create a physical layout as prompted. You can
also manually create a physical location layout.


You can also upload the physical layout template photo on the WebUI as follows: Log in to
https://intl.fusionsolar.huawei.com to access the WebUI of the FusionSolar Smart PV
Management System. On the Home page, click the plant name to go to the plant page. Select
layout. Choose Click to Upload, and upload the physical layout template photo.


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Scenario 2: Setting on the Solar Inverter Side (Solar Inverter Not Connected to the
Management System)
1. If the solar inverter is not connected to the FusionSolar Smart PV Management System,
access the Device commissioning screen (Refer to 7.1 Device Commissioning.) on the
FusionSolar app to set the physical layout of Smart PV Optimizers.
a. Log in to the FusionSolar app. On the Device commissioning screen, choose Maintenance
> Optimizer layout. The Optimizer layout screen is displayed.
b. Tap the blank area. The Identify image and Add PV modules buttons are displayed. You
can use either of the following methods to perform operations as prompted:
• Method 1: Tap Identify image and upload the physical layout template photo to complete
the optimizer layout. (The optimizers that fail to be identified need to be manually bound.)
• Method 2: Tap Add PV modules to manually add PV modules and bind the optimizers to
the PV modules.


For details about the physical layout of optimizers on the FusionSolar
app and FusionSolar WebUI, see the FusionSolar App Quick Guide. You
can scan the QR code to download the quick guide.

6.5 SmartLogger Networking Scenario
For details, see the PV Plants Connecting to Huawei Hosting Cloud Quick
Guide (Inverters + SmartLogger3000 + RS485 Networking). You can scan the
QR codes to obtain the documents.


SmartLogger3000

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7 FAQ
7.1 Device Commissioning
1. Access Device commissioning.
Scenario 1: Your phone is not Scenario 2: Your phone is
connected to the Internet. connected to the Internet.


When your phone is
connected to the
Internet, Device
commissioning is not
displayed after you tap
....


2. Connect to the solar inverter WLAN and log in as installer to access the device commissioning
screen.


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7.2 Resetting the Password
1. Ensure that the SUN2000 connects to the AC and DC power supplies at the same time.
Indicators and are steady green or blinking slowly for more than 3 minutes.
2. Perform the following operations within 4 minutes:
a. Turn off the AC switch and set the DC SWITCH at the bottom of the SUN2000 to OFF. If the
SUN2000 connects to batteries, turn off the battery switch. Wait until all the LED indicators
on the SUN2000 panel turn off.
b. Turn on the AC switch, set the DC SWITCH to ON, and wait for about 90s. Ensure that the
indicator is blinking green slowly.
c. Turn off the AC switch and set the DC SWITCH to OFF. Wait until all LED indicators on the
SUN2000 panel turn off.
d. Turn on the AC switch and set the DC SWITCH to ON.
3. Reset the password within 10 minutes. (If no operation is performed within 10 minutes, all
inverter parameters remain unchanged.)
a. Wait until the indicator blinks green slowly.
b. Obtain the initial WLAN hotspot name (SSID) and initial password (PSW) from the label
on the side of the SUN2000 and connect to the SUN2000 on the app.
c. On the login screen, set a new login password and log in to the app.
4. Set router and management system parameters to implement remote management.
8 Installation Video

You can scan the QR code below to obtain the installation video.


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9 Customer Service Contact
Customer Service Contact
Region Country Service Support Email Phone
France
Germany
Spain
eu_inverter_support@huawei.com 0080033888888
Europe Italy
UK
Netherlands
Other countries For details, see solar.huawei.com.
Australia eu_inverter_support@huawei.com 1800046639
Turkey eu_inverter_support@huawei.com N/A
0080021686868
Malaysia
/1800220036
(+66) 26542662 (charged
apsupport@huawei.com
Asia Pacific by local call)
Thailand
1800290055 (free in
Thailand)

China solarservice@huawei.com 400-822-9999
Other countries apsupport@huawei.com 0060-3-21686868
Japan Japan Japan_ESC@ms.huawei.com 0120258367
India India indiaenterprise_TAC@huawei.com 1800 103 8009
Republic of Republic of
Japan_ESC@ms.huawei.com N/A
Korea Korea
North USA eu_inverter_support@huawei.com 1-877-948-2934
America Canada eu_inverter_support@huawei.com 1-855-482-9343
018007703456
Mexico
/0052-442-4288288
Argentina 0-8009993456
Latin America la_inverter_support@huawei.com
Brazil 0-8005953456
Chile 800201866 (only for fixed)
Other countries 0052-442-4288288
08002229000
Egypt
/0020235353900

UAE 08002229000

South Africa 0800222900
Middle East
eu_inverter_support@huawei.com
and Africa Saudi Arabia 8001161177

Pakistan 0092512800019

Morocco 0800009900

Other countries 0020235353900
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Huawei Technologies Co., Ltd.
Huawei Industrial Base, Bantian, Longgang
Shenzhen 518129 People's Republic of China
solar.huawei.com