Huawei SUN2000-25KTL-US User manual

HUAWEI TECHNOLOGIES CO., LTD.
0
SUN2000-(25KTL, 30KTL)-US
Quick Installation Guide
Issue: 04
Part Number: 31507215
Date: 2019-06-30

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1Product Overview
1. 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.
2. Before installing the device, read the SUN2000-(25KTL, 30KTL)-US User Manual for knowledge
of product information and safety precautions.
3. Only qualified and trained electrical technicians are allowed to operate the device. Operators
should understand the components and functioning of a grid-tied PV power system, and they
should be familiar with relevant local standards.
4. Before installing the device, check that deliverables are intact and complete against the packing
list. If any damage is found or any component is missing, contact the dealer.
5. Use insulated tools when installing the device. For personal safety, wear insulation gloves and
protective shoes.
6. When installing devices or connecting cables, use appropriate tools and take necessary
protective measures to avoid damaging devices during operation.
7. Huawei shall not be liable for any consequence caused by violation of the storage, transportation,
installation, and operation regulations specified in this document and the user manual.
FrontView
(1) PV connection indicator
(3) Communications indicator
(4) Alarm/Maintenance indicator
(6) Maintenance compartment door
(5) Host panel
(2) Grid-tied indicator
Ports (1) DC switch (DC SWITCH)
(3) Functional ground point
(4) Waterproof cable connector (COM1)
(6) Waterproof cable connector (AC OUTPUT)
(5) Protective ground point
(7) Waterproof cable connector (COM3)
(2) Positive DC terminal (+)
(8) Waterproof cable connector (COM2)
(9) Waterproof cable connector (GND)
(10) USB port (USB)
(11) Negative DC terminal (–)
(12) Ventilation valve
Copyright © Huawei Technologies Co., Ltd.
2019. All rights reserved.

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2System Installation
Determining the Installation Position
2.1
It is recommended that the inverter be installed vertically or with a back tilt of no more than 15
degrees for optimal heat dissipation conditions.
Installation dimensions Chassis dimensions
Determining the Installation Mode
2.2
Installedon a Common Support
Vertical Back tilt Upside down Front tilt Horizontal
Installedon a Wall
Vertical Back tilt Upside downFront tilt Horizontal
NOTE

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Installing an Inverter
2.3
Installedon a TiltedSupport
Installedon a Common Support
Back tilt Upside downFront tilt Horizontal
1. Determine the hole positions on the support
based on rear panel dimensions. 2. Drill holes.
4. Mount the inverter on the rear panel.
3. Secure the rear panel.
M12 (3 PCS)
45 N·m

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6. (Optional) Install an anti-theft lock.5. Tighten hexagon bolts.
The anti-theft lock is prepared by the customer.
Installedon a Wall
1. Determine the positions for drilling holes on the wall according to the rear panel dimensions.
2. Drill holes and install expansion sleeves for expansion bolts.
NOTE

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M12 (3 PCS)
45 N·m
3. Secure the rear panel. 4. Mount the inverter on the rear panel.
6. (Optional) Install an anti-theft lock.5. Tighten hexagon bolts.
The anti-theft lock is prepared by the customer.
Installedon a TiltedSupport
1. Prepare a tilted support. Front view
NOTE
1. The hole dimensions of the bottom auxiliary tightening point in the top view are OB-13 mm x 8
mm (OB-0.51 in. x 0.31 in.).
2. The hole dimensions of the tightening point for the tilted support mounting kit in the front view
are OB-32 mm x 12 mm (OB-1.26 in. x 0.47 in.).
3. The auxiliary tightening point is 5 mm (0.20 in.) away from the lower tightening point for the tilted
support mounting kit.
NOTE
Top view
Side view

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3. Secure the inverter to the tilted support.
5. (Optional) Install an anti-theft lock.
2. Secure the tilted support mounting kit to the inverter.
M6 (8 PCS)
4 N·m
M6 (2 PCS)
4 N·m
M8 (4 PCS)
8 N·m
4. (Optional) Secure the auxiliary screws to the inverter.
The anti-theft lock
is prepared by the
customer.
3Electrical Connection
Installing Ground Cables
3.1
The hex key is stored in the fitting bag bound to
the chassis base.
1. Remove the two screws from the
maintenance compartment door using a
hex key and set them aside.
Electrical connections must meet local installation regulatory requirements.
1. Do not leave unused screwsin the chassis.
2. Do not open the host panel of the inverter.
3. Before opening the maintenance
compartment door, turn off the downstream
AC output circuit breaker and DC switch on
the inverter.
NOTE
NOTE

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2. Open the maintenance compartment door and adjust the support bar.
3. Remove the AC terminal cover and set it aside.
Ground Point Meaning Ground Point
Screw Model Connection
1PV side ground points M4 Connect either of the two ground
points for PV side grounding.
2M6
3Protection ground points M6 Connect either of the two ground
points for protective grounding.
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4. Install ground cables.

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InstallingGround Cables(GroundPoints1 and 4 Are Used as an Example)
NOTE
1. Select ground points for PV side grounding and protective grounding based on the principle of
easy operation.
2. It is recommended that 8 AWG outdoor copper-core cables be used as ground cables. Ground
cables must be securely connected.
3. It is recommended that ground cables of the inverter be connected to the near end.
4. To prevent corrosion, apply silica gel or paint to the PE terminal after connecting the ground cables.
Ground Point
OT Terminal
Tightening Torque
1M4 1.2 N·m
4M6 5 N·m
1. Route the PV module ground cable through the
GND hole at the inverter bottom.
2. Route the protective ground cable through the
AC OUTPUT hole at the inverter bottom.
3. When connecting the PE cable to the ground
point 4, if the SUN2000 is insecurely installed
and the AC output power cable bears the pulling
force, ensure that the last cable bearing the
force is the PE cable.
1. The SUN2000-25KTL/30KTL-US (SUN2000 for short) supports three-phase, four-wire (L1, L2,
L3, and N) and three-phase, three-wire (L1, L2, and L3) output modes. Use a connection mode
according to the local and national regulations and installation specifications.
2. Use copper cables that can withstand 90°C (194°F) or 105°C (221°F).
3. It is recommended that the AC output cable be routed through a pipe for protection.
4. The table lists only the recommended cable specifications. For more information about cable
specifications, see the SUN2000-(25KTL, 30KTL)-US User Manual.
Cable Type Cable Quantity Recommended Cable Specifications
A single cable Four (L1, L2, L3, and N) or three
(L1, L2, and L3) 4 AWG
Installing AC Output Power Cables
3.2
NOTE
1. The OT terminal type is M6.
2. If heat shrink tubing is used, put it through the
power cable and then crimp the OT terminal.
1. Remove the waterproof cable connector from AC OUTPUT.
2. Route the AC output power cable through the prepared cable routing pipe.
3. Route the AC output power cable and the cable routing pipe through the AC OUTPUT hole at the
inverter bottom.
4. Prepare AC output power cables. Use hydraulic pliers to crimp the conductor part of the OT
terminal and cover the crimping area with heat shrink tubing or PVC insulation tape.
NOTE
NOTE

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1. The AC output power cable must be secured to a torque that does not exceed 6 N·m.
Otherwise, the AC terminal block may be damaged.
2. Ensure that the AC output power cable is securely connected. Otherwise, the inverter may fail
to run or the terminal block may be damaged after the inverter operates.
6. Secure the cable routing pipe.
5. Connect the SUN2000 AC output power cables to the AC terminal block one by one.
Three-phase, four-wire output Three-phase, three-wire output
Adjust the sequence of installing AC output power cables based on site requirements.
Number of Inputs SUN2000-25KTL/30KTL-US
1Connects to any one route
2 Connects to routes 1 and 3
3 Connects to routes 1, 3, and 5
4 Connects to routes 1, 2, 3, and 5
5 Connects to routes 1, 2, 3, 4, and 5
6Connects to routes 1, 2, 3, 4, 5, and 6
OptionalDC inputterminals
Routes 1, 2, 3, 4, 5, and 6 are
defined from left to right.
Installing DC Input Power Cables
3.3
M6 (3 PCS)
5 N·m
M6 (4 PCS)
5 N·m
NOTE
NOTE
•Ensure that the PV module output is well insulated to ground.
•Before inserting the positive and negative connectors respectively into the positive and
negative DC input terminals of the inverter, check that the DC voltage does not exceed 1000 V
using a multimeter. Otherwise, the inverter will be damaged.

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1. Use the positive and negative metal contacts and DC connectors supplied withthe SUN2000. Using
other models of positive and negative metal contacts and DC connectors may result in serious
consequences. The caused device damage is not covered under any warranty or service agreement.
2. The metal contacts supplied with the DC connectors are either cold forming contacts or stamping
forming contacts. Crimp the metal cold forming contacts using crimping tool UTXTC0005 (Amphenol,
recommended) or H4TC0001 (Amphenol). Crimp the metal stamping forming contacts using crimping
tool H4TC0003 (Amphenol, recommended), H4TC0002 (Amphenol), PV-CZM-22100 (Staubli), or PV-
CZM-19100 (Staubli). When choosing PV-CZM-22100 or PV-CZM-19100, do not use the locator.
Otherwise, metal contacts would be damaged.
3. Before connecting DC input power cables, mark the polarities on the cables to ensure that the
cables are connected correctly. If the cables are connected incorrectly, the device may be
damaged.
4. Insert the crimped metal terminals of the positive and negative power cables into the appropriate
positive and negative connectors. Then pull back the DC input power cables to ensure that they
are connected securely.
5. Connect the positive and negative connectors to the appropriate positive and negative DC input
terminals. Then pull DC input power cables to ensure that they are connected securely.
6. If the DC input power cables are reversely connected and the DC SWITCH is ON, do not turn off
the DC SWITCH immediately. Otherwise, the inverter may be damaged and the damage is
beyond the warranty scope. Wait until the PV string voltage reduces to the safety range (below
60 V DC). Then, turn off the DC SWITCH, remove the positive and negative connectors, and
rectify the connection.
Installinga DC input power cable (using metal coldformingcontacts)
Positive metal contact
Negative metal contact
CommonPV cableswith a
cross-sectionalarea of 12
AWGare recommended.
Ensure that cablescannot
be removedafter crimped.
Ensure that the
locking nut is
secured.
Positive connector
Negative
connector Click
Ensure that the
cablesare correctly
connected and the
voltage does not
exceed1000 V.

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Selecting a Communication Mode
3.4
Model Communication Mode Remarks
RS485
Communication
PLC (MBUS)
Communication
SUN2000
-
25KTL/30KTL
-
US
Supported Supported
1.
Only one communications mode can be
selected in practice.
2. If PLC (MBUS) is used, do not connect the
RS485 communications cable.
SUN2000
-
25KTL/30KTL
-
US
Supported Not supported
N/A
When routing communications cables, ensure that communications cables are separated from
power cables and away from interfering source to prevent communication from being affected.
Installing RS485 Communications Cables
3.5
NOTE
1. If RS485 is used, connect the RS485 communications cable. If PLC (MBUS) is used, do not
connect the communications cable.
2. The RS485 communications cable can connect to either a terminal block or an RJ45 network port.
Use one connection mode in practice. Connecting to the terminal block is recommended.
3. If the RS485 communications cable is required, you are advised to route the RS485
communications cable through a pipe. Before connecting cables, remove the corresponding
waterproof cable connectors.
Method 1: Connecting to the Terminal Block (Recommended)
The DJYP2VP2-22 2 x 2 x 1 cable or a communications cable with a wire sectional area of 1 mm2
(0.00155 in.2) and external diameter of 14–18 mm (0.55–0.71 in.) is recommended.
Installinga DC input power cable (using metal stamping formingcontacts)
Positive metal contact
Negative metal contact
CommonPV cables with a
cross-sectionalarea of 12
AWGare recommended.
Ensure that cablescannot
be removedafter crimped.
Ensure that
the locking
nut is
secured.
Positive connector
Negative
connector Click
Ensure that the
cablesare correctly
connected and the
voltage doesnot
exceed1000V.

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2. Connect the RS485 communications cables. 3. Bind the RS485 communications cables.
1. Route the communications cables through theCOM1 and COM2 holes at the bottom of the
inverter.
2. Connect the input end to terminals 5 and 7 on the terminal block, and connect the output end to
terminals 6 and 8 on the terminal block. Connect the shield layer to the ground point.
3. The OT terminal used for connecting to the shield layer is in the type of M4.
4. If multiple inverters are connected over communications cables, ensure that RS485A and RS485B
of the previous inverter connect to RS485A and RS485B of the following inverter, respectively.
4. Secure the cable routing pipe.
1. Prepare an RS485 connector.
The figure shows the connector when the
surface without the fastener faces upwards.
The following table lists the cable No.,
color, and pin definition.
You are advised to use a CAT 5E outdoor
shielded network cable with a diameter less than
9 mm (0.35 in.) and internal resistance no greater
than 1.5 ohms/10 m (1.5 ohms/393.70 in.).
Method 2:Connectingto RJ45 Ports
No. Color Pin Definition
1White-and-orange RS485A, RS485
differential signal +
2Orange RS485B, RS485
differential signal –
3White-and-green NC
4Blue RS485A, RS485
differential signal +
5White-and-blue RS485B, RS485
differential signal –
6Green NC
7White-and-brown NC
8Brown NC
1. Peel off the RS485 communications cables.

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2. Connect the RS485 communications cables. 3. Bind the RS485 communications cables.
4. Secure the cable routing pipe.
1. Route the network cables into the COM1 hole at the bottom of the inverter.
2. Insert the connectors into the RS485 IN and RS485 OUT ports in the maintenance compartment
of the inverter.
3. Block unused waterproof cable connectors with waterproof plugs.
4Installation Verification
1. The SUN2000 is installed correctly and securely. Yes □No □
2. All circuit breakers are switched to OFF. Yes □No □
3. Cables connected are not damaged. Yes □No □
4. Ground cables are connected correctly and securely, with no open circuit or
short-circuit. Yes □No □
5. AC output power cables are connected correctly and securely, with no open
circuit or short-circuit. Yes □No □
6. The DC input voltage is not higher than 1000 V and meets the local voltage
range requirements. Yes □No □
7. DC input power cables are connected correctly and securely, with no open circuit
or short-circuit. Yes □No □
8. RS485 communications cables are connected correctly and securely. Yes □No □
9. Idle DC input terminals are sealed. Yes □No □
10.Idle USB ports are plugged with covers. Yes □No □
11.Idle waterproof cable connectors are plugged and the locking caps are tightened. Yes □No □
After the verification, reinstall the AC terminal cover, adjust the support bar, and close the
maintenance compartment door. Then, tighten the two screws on the door to a torque of 4 N·m.
Check that the maintenance compartment door is locked.

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5System Power-on
1. Switch on the AC circuit breaker between the inverter and the power grid.
2. Press DC SWITCH at the bottom of the inverter and rotate it to the ON position.
3. (Optional) Measure the temperatures at the joints between the DC terminals and the connectors
using a thermometer.
4. Observe the LED indicators to check the inverter operating status.
Indicator Status Meaning
PV connection
indicator
Steady green
At least one PV string is properly connected,
and the DC input voltage of the corresponding
MPPT circuit is higher than or equal to 200 V.
Off
The inverter disconnects from all PV strings, or
the DC input voltage of each MPPT circuit is
less than 200 V.
Grid
-
tie indicator
Steady green
The inverter is grid
-tied.
Off
The inverter is not grid
-tied.
Communication
indicator
Blinking green (on for 0.5s and
off for 0.5s)
The SUN2000 receives communications data
normally.
Off
The SUN2000 receives no communications
data for 10s.
Alarm/
Maintenance
indicator
Alarm state
Blinking red slowly
(on for 1s and then
off for 4s)
The inverter has generated a warning.
Blinking red fast
(on for 0.5s and
then off for 0.5s)
The inverter has generated a minor alarm.
Steady red
The inverter has generated a major alarm.
Local
maintenance
state
Blinking green
slowly (on for 1s
and then off for 1s)
Local maintenance is in progress.
Blinking green fast
(on for 0.125s and
off for 0.125s)
Local maintenance has failed.
Steady green
Local maintenance is successful.
Before switching on the AC circuit breaker between the inverter and the power grid, use a
multimeter to check that the AC voltage is within the specified range.
If the DC input power cables are reversely connected and the DC switch is ON, do not turn off the
DC switch immediately. Otherwise, the inverter may be damaged. Wait until the PV string voltage
reduces to the safety range. Then, turn off the DC switch, remove the positive and negative
connectors, and rectify the connection.

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6SUN2000APP
1. The SUN2000 app is a mobile phone app that communicates with the SUN2000 monitoring
system over a USB data cable, a Bluetooth module, or a WLAN module. As a convenient local
monitoring and maintenance platform, it supports alarm query, parameter settings, and routine
maintenance. The app name is SUN2000.
2. Access Huawei application store (https://appstore.huawei.com) or Google Play
(https://play.google.com), search for SUN2000, and download the app installation package.
3. Connect a USB data cable, a Bluetooth module, or a WLAN module to the USB port of the
SUN2000 to implement the communication between the SUN2000 and the app.
WLAN or Bluetooth Connection USB DataCable Connection
NOTE
•The screenshots in this document correspond to app version 3.2.00.001
(Android).
•When the WLAN connection is used, the initial name of the WLAN
hotspot is Adapter-WLAN module SN, and the initial password is
Changeme.
•The initial password for Common User, Advanced User, and Special
User is 00000a.
•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.
•Set the correct grid code based on the application area and scenario of
the solar inverter.
Login Page Select Connection
Mode Select User Quick Settings
Function Menu

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7FAQ
The DC switch is designed with a hole for safety purposes. When maintenance needs to be
performed on the inverter, the DC switch must be turned off. To prevent misoperations of turning on
the DC switch, the switch must be locked. The design with a hole enables the DC switch to be locked.
After the inverter has been running for a period, use a point-test thermometer to measure the
temperatures at the joints between DC terminals and connectors to check that the DC terminals
are in good contact.
Why the DC Switch Is Designed with a Hole?
7.1
What Is the Purpose of Measuring the Temperatures at the Joints
Between DC terminals and Connectors Using a Point-Test
Thermometer?
7.2
Appendix: Power Grid Code Mapping Table
The grid codes are subject to change and are for your reference only.
No. Power Grid Standard Code Country and Condition
1 IEEE 1547-MV480 US medium-voltage power grid
2 IEEE 1547a-MV480 2016 US medium-voltage power grid
3 PRC_024_ERCOT-MV480 Texas medium-voltage power grid
4 PRC_024_Eastern-MV480 Eastern US medium-voltage power grid
5 PRC_024_Western-MV480 Western US medium-voltage power grid
6 PRC_024_Quebec-MV480 Quebec medium-voltage power grid
7 ELEC RULE NO.21-MV480 California medium-voltage power grid
8 HECO-MV480 Hawaii medium-voltage power grid
NOTE

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