Huawei SUN2000 Series User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL,
40KTL)-M3
Quick Guide
Issue: 04
Part Number: 31500EAC
Date: 2021-03-05

1
1Overview
Copyright © Huawei Technologies Co., Ltd. 2021. 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) Heat sink
(4
) Screws for fixing the awning
(5) Communications port (COM)
(6) Hole for the DC switch locking screw
(7) DC switch (DC SWITCH)
(8) Smart Dongle port (4G/WLAN
-FE)
(9) Ventilation valves
(10) DC input terminals (PV1
–PV8)
(11) AC output port
(12) Ground point

2
2Installation Requirements
Dimensions
Angle Space
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.
•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.

3
Position for binding
the security Torx
wrench
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

4
2. Install the solar inverter onto the
mounting bracket.
3. Tighten the security Torx screws on both
sides.
Preparations
4.1
4Connecting Cables
•Connect cables in accordance with local installation laws and regulations.
•The cable specifications must comply with local standards.
•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.
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: 16-50
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
Note a: Five
-core cables with a cross-sectional area of 5 x 35 mm2or 5 x 50 mm2are not
supported.
Secure the screws on the sides before connecting cables.

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

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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.

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1. Use the positive and negative Staubli MC4 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.
2. You are advised to use the PV-CZM-22100 (Staubli) crimping tool and do not use it with the
positioning block. Otherwise, the metal terminals may be damaged. The PV-MS (Staubli) or
PV-MS-HZ (Staubli) open-end wrench is recommended.
3. Ensure that the PV module output is well insulated to ground.
4. The DC input voltage of the SUN2000-29.9KTL/30KTL/36KTL/40KTL-M3 shall not exceed
1100 V DC under any circumstance.
5. The DC input voltage of the SUN2000-20KTL-M3 shall not exceed 800 V DC under any
circumstance.
6. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
7. 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. If the SUN2000 is used with an optimizer, the number of optimizers for a single PV string
cannot exceed 25.
9. If the PV string is configured with an optimizer, check the cable polarity by referring to the
smart PV optimizer quick guide.
Installing DC Input Power Cables
4.4
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
PV-CZM-22100
PV-MS-HZ
Open-end
wrench
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.

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(Optional) Installing the Smart Dongle
4.5
•The Smart Dongle is not provided in standard configuration.
•For details about how to operate the WLAN-FE Smart Dongle SDongleA-05, see
SDongleA-
05 Quick Guide (WLAN-FE) .
•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.
Smart Dongle port (4G/WLAN-FE)
WLAN-FE 4G
WLAN-FE Smart Dongle (WLAN Communication)
WLAN-FE Smart Dongle (FE Communication)
Install the network cable before installing the Smart Dongle on the solar inverter.

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•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.
When reinstalling the cover of the Smart Dongle,
ensure that the buckle springs back in place.
4G Smart Dongle
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.

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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
. It
can also connect
to an EMI.
2
485A1
-2
RS485
differential
signal +
Used to cascade
inverters or
connect to the
SmartLogger
. It
can also connect
to an EMI.
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
Supports AC NS
protection
shutdown, which
can be used as a
reserved port for
rapid shutdown
signals.
16
GND

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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.

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•Connect the RS485 communications cable to the solar inverter.
If two or more solar inverters are cascaded, install the RS485 communications cable.
•Connect the RS485 communications cable to the power meter.
•Connect the power grid scheduling signal cable.
•Connect the rapid shutdown signal cable.

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2. Connect the signal cable connector to the communications port.
Communications
port (COM)
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

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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. (Optional) Remove the locking screw beside the DC switch. Store the screws properly for
future power-off maintenance.
3. Turn on the DC switch at the bottom of the solar inverter.
4. 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
Communications
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.

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7System Commissioning
•If the solar inverter is connected to the FusionSolar smart PV management system, the
FusionSolar app is recommended. In areas (such as the UK) where the FusionSolar app is not
available, or when a third-party management system is used, only the SUN2000 app can be
used for commissioning.
•Access the Huawei app store (http://appstore.huawei.com), search for FusionSolar or
SUN2000, and download the app installation package. You can also scan the QR codes below
to download the apps.
FusionSolar App SUN2000 App
•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.
•Set the password at the first login. 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.
•Set the correct grid code based on the application area and scenario of the solar inverter.

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•Create the first installer account will generate a domain named after the company.
If you already have an installer account, skip this step.
•To create multiple installer accounts for a company, log in to the FusionSolar app and tap
New User to create installer accounts.
1. (Optional) Register an installer account.
Scenario in Which Solar Inverters Are Connected to the FusionSolar
Smart PV Management System
7.1

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2. Create a PV plant and a plant owner.
1. Open the SUN2000 app, scan the QR code of the solar inverter or manually connect to the
WLAN hotspot to access the device commissioning screen.
2. Select installer and enter the login password.
3. Tap Log in to access the quick settings screen or solar inverter home screen.
Scenario in Which Solar Inverters Are Connected to Other
Management Systems
7.2
For details, see the FusionSolar App Quick
Guide . During the FusionSolar app upgrade,
scan the QR code to download the
corresponding quick guide according to the
downloaded app version.

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Inverter Connected to Optimizers
7.3
For details about how to add optimizers and the physical layout of optimizers, see SUN2000-
450W-P Smart PV Optimizer Quick Guide and FusionSolar App Quick Guide . You can scan the
QR codes to obtain the documents. During the FusionSolar app upgrade, scan the QR code to
download the corresponding quick guide according to the downloaded app version.
8FAQ: How Do I Reset the Password?
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 3 minutes:
a. Turn on the AC switch and wait until the indicator blinks.
b. Turn off the AC switch and wait until all indicators on the solar inverter panel turn off.
c. Turn on the AC switch and wait until all LED indicators on the inverter panel blink and
turn off after about 30s.
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.
6. Set router and management system parameters to implement remote management.
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.)
SUN2000-450W-P

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