SUN2000-(50KTL-ZHM3, 50KTL-M3) Quick Guide

SUN2000-(50KTL-ZHM3, 50KTL-M3)
Quick Guide


Issue: 05
Part Number: 31500HTB
Date: 2023-05-30


HUAWEI TECHNOLOGIES CO., LTD.
• 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.
1 Overview


Copyright © Huawei Technologies Co., Ltd. 2023. All
1 rights reserved.
(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
2 Installation Requirements

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).

Angle Space


Dimensions


3 Installing 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.

2
• 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.


Position for binding the
security Torx wrench


(Optional) Installing the DC
Moving the Solar Inverter
Switch Locking Screw


1. Install the mounting bracket.


It is recommended that anti-rust measures be taken on the positions for drilling holes.


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


Secure the screws on the sides before connecting cables.
4 Connecting Cables
4.1 Preparations

• 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.


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No. Cable Type Specifications
Single-core outdoor copper-
1 PE cable Conductor cross-sectional area ≥ 16 mm2
core cable
• Conductor cross-sectional area: 25–50
AC output power Outdoor copper- mm2 outdoor copper-core cable or 35–
2
cable core/aluminum-core cable 50 mm2 outdoor aluminum-core cablea
• Cable outer diameter: 16–38 mm
Common outdoor PV cable in • Conductor cross-sectional area: 4–6
DC input power
3 the industry (recommended mm2
cable
model: PV1-F) • Cable outer diameter: 5.5–9 mm

(Optional) RS485 Two-core outdoor shielded • Conductor cross-sectional area: 0.2–1
4 communications twisted pair (recommended mm2
cable model: DJYP2VP2-2x2x0.75) • Cable outer diameter: 4–11 mm
AC circuit Recommended: three-phase Rated voltage ≥ 500 V AC
5 breaker AC circuit breaker Rated current: 125 A

Note a: Five-core cables with a cross-sectional area of 5 x 35 mm2 or 5 x 50 mm2 are not
supported.

4.2 Connecting a PE Cable
Reserved PE point

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, 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.

4.3 Installing the AC Output Power Cable


• 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.


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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.

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4.4 Installing DC Input Power Cables


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 Number of
Terminal Selection Terminal Selection
PV Inputs PV Inputs
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, 8 PV1, PV2, PV3, PV4, PV5, PV6, PV7,
PV8 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 metal terminal Positive connector


Negative Click
Ensure that the cable connector
Negative metal terminal cannot be pulled out
after being crimped.


Use the wrench shown
Ensure that the in the figure to tighten
cables are correctly the locking nut. When
connected. the wrench slips
during the
tightening,
the locking
nut has been
tightened.

Click


4.5 (Optional) Installing the Smart Dongle

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.


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4.6 Installing the Signal Cable


• 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.

COM Port Pin Definitions


Definiti Definitio
No. Function Description No. Function Description
on n
RS485 RS485
485A1-
1 differential 2 485A1-2 differential
1 Used to cascade Used to cascade
signal + inverters or signal + inverters or
RS485 connect to the RS485 connect to the
3 485B1-1 differential SmartLogger. 4 485B1-2 differential SmartLogger.
signal – signal –
Ground point Ground
5 PE on the shield – 6 PE point on the –
layer shield layer
RS485 Connects to the
7 485A2 differential RS485 signal 8 DIN1
signal + port on the
RS485 power grid
9 485B2 differential scheduling 10 DIN2
signal – power meter. Dry contact
11 – – – 12 DIN3 for power
–
13 GND GND – 14 DIN4 grid
Supports scheduling
Rapid functions such
shutdown/NS as rapid
15 DIN5 16 GND
protection/OV shutdown, NS
GR protection, and
OVGR.
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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)


5 Verifying the Installation
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.


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6 System 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.
Status (Blinking Slowly: On for 1s and then
Category Description
Off for 1s; Blinking Fast: On for 0.2s and
then Off for 0.2s)

–

The solar inverter is operating in
Steady green Steady green
grid-tied mode.
Blinking green
Off The DC is on and the AC is off.
slowly
Both the DC and AC are on, and
Running indicator Blinking green
Blinking green slowly the solar inverter is not supplying
slowly
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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7 System Commissioning

• If the solar inverter is connected to the FusionSolar smart PV management system, the
FusionSolar app is recommended. In areas 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.


• 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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7.1 Scenario in Which Solar Inverters Are Connected to the FusionSolar
Smart PV Management System
1. (Optional) Register an installer account.

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

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


• To create multiple installer accounts for a company, log in to the FusionSolar app and tap
Add User to create installer accounts.


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2. Create a PV plant and a plant owner.


• In the quick settings for
SUN2000-50KTL-M3, the
grid code is 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.


Scenario in Which Solar Inverters Are Connected to Other
7.2 Management Systems

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.


For details, see the FusionSolar App Quick Guide.


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8 FAQ: 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 4 minutes:
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.
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. 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.


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