Huawei SUN2000-25KTL-US User manual

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HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(25KTL, 30KTL)-US
Quick Installation Guide
Issue: Draft B
Part Number: 31507215
Date: 2015-08-26

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1 System Installation
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. To obtain the user manual, log in to
http://support.huawei.com/carrier/ and browse or search for SUN2000 on the Product Support
page.
3. Install and use the device according to this document and the user manual. Otherwise, the
device may be damaged. Use insulated tools when installing the device.
Vertical Backward Upside down
Inverter Model SUN2000-(25KTL, 30KTL)-US
Weight 55 kg (121.25 lb.)
Dimensions (H x W x D) 770 mm (30.31 in.) x 550 mm (21.65 in.) x 270 mm (10.63 in.)
Determining the Installation Position
1.1
Determining the Installation Mode
1.2
In a vertical support, install the device vertically or with a backward tilt of no more than 15 degrees.
Forward
Installation dimensions Chassis dimensions
Horizontal
Copyright © Huawei Technologies Co., Ltd. 2015. All rights reserved.
NOTICE
NOTE

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1. Determine the hole positions on the support
based on rear panel dimensions. 2. Drill holes.
4. Mount the inverter on the backplane.
6. (Optional) Install an anti-theft lock.
M12 (3 PCS)
45 N·m
3. Secure the rear panel.
5. Tighten hexagon bolts.
1. The anti-theft lock is prepared by the customer.
2. For details about how to wall-mount the device, see the SUN2000-(25KTL, 30KTL)-US User
Manual.
NOTE
A vertical support
Installing an Inverter (Installation using a vertical support and a tilted
support is used as an example.)
1.3

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A tilted support
M6 (8 PCS)
4 N·m
3. Secure the inverter to the tilted support.
2. Secure the tilted support mounting kit to the inverter.
M6（2 PCS）
4 N·m
1. The anti-theft lock is prepared by the customer.
2. For details about how to wall-mount the device, see the SUN2000-
(25KTL, 30KTL)-US User Manual.
NOTE
1. Prepare a tilted support.
Top view
Front view Side 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 backplane tightening point in the front view are OB-32 mm x 12 mm
(OB-1.26 in. x 0.47 in.).
3. The bottom auxiliary tightening point is 5 mm (0.20 in.) away from the backplane tightening point
below.
4. (Optional) Secure the auxiliary screws to the
inverter.
M8（4 PCS）
8 N·m
5. (Optional) Install an anti-theft lock.

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2 Electrical Connection
3. Remove the AC terminal cover and set it aside.
Installing Ground Cables
2.1
NOTICE
1. The hex key is stored in the fitting bag bound
to the chassis base.
2. If the two screws on the maintenance
compartment door are lost, use the standby
M6 hexagon screw assemblies available in
the fitting bag that is bound to the chassis
base.
NOTE
1. Remove the two screws from the maintenance compartment door using a hex key and set them
aside.
1. Do not leave unused screws in the chassis.
2. Do not open the host panel of the inverter.
3. Before opening the chassis door, switch off
the upstream DC input circuit breaker and
downstream AC output circuit breaker.
2. Open the maintenance compartment door and adjust the support bar.
NOTICE
Electrical connections must meet local installation regulatory requirements.

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4. Install ground cables.
Installing Ground Cables (Ground Points
1 and 4 Are Used as an Example)
NOTE
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
1
The screw specification is M4.
The specification of the cable
that can be connected is 8
AWG.
1.2 N·m
4
The screw specification is M6.
The specification of the cable
that can be connected is 8
AWG.
5 N·m
1. Connect the ground cable to the GND
waterproof cable connector at the inverter
bottom for PV side grounding.
2. Connect the ground cable to the AC OUTPUT
waterproof cable connector at the inverter
bottom for protective grounding.
Ground Point Meaning Ground Point
Screw Model Connection
1 PV side ground points M4 Connect either of the two ground
points for PV side grounding.
2 M6
3 Protection ground points M6 Connect either of the two ground
points for protective grounding.
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M6 (4 PCS)
5 N·m
Optional DC input terminals
Routes 1, 2, 3, 4, 5, and 6 are defined from left to right.
1. Prepare an AC output power cable. 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.
1. UL1015 copper-core cables that can withstand 105 °C (221 °F) are recommended.
2. The table lists only the recommended cable specifications. For more information about cable
specifications, see the SUN2000-(25KTL, 30KTL)-US User Manual.
3. It is recommended that the AC output cable be routed through a pipe for protection. The maximum
pipe outer diameter allowed is 40.5 mm (1.59 in.).
Cable Type Cable Quantity Recommended Cable Specifications
A single cable Four (L1, L2, L3, and N) 6 AWG
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.
Installing AC Output Power Cables
2.2
Installing DC Input Power Cables
2.3
NOTE
NOTE
NOTE
NOTICE
Number of
Inputs SUN2000-(25KTL, 30KTL)-US
1 Connects 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
6 Connects to routes 1, 2, 3, 4, 5, and 6
6. Secure the cable routing pipe.
2. Remove the AC OUTPUT waterproof cable connector.
3. Route the prepared AC output power cable through the cable routing pipe.
4. Route the AC output cable and the cable routing pipe through the AC OUTPUT hole.
5. Connect the wires of the AC output cable for the SUN2000 to L1, L2, L3, and N on the AC terminal
block.
1. The OT terminal screw hole specifications are M6. The
maximum specifications of cables that can be connected
are 6 AWG.
2. If heat shrink tubing is used, put it through the power cable
and then crimp the OT terminal.

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Positive and negative metal terminals
Negative metal terminal (male)
Positive metal terminal (female)
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
2.4
Positive metal terminal
Negative metal terminal
Common PV cables with a
cross-sectional area of 12
AWG are recommended.
Recommended: H4TC0001
(Amphenol)
Ensure that cables
cannot be removed after
crimped.
Ensure that the
locking nut is
secured.
Recommended: H4TW0001
(Amphenol)
Positive connector
Negative
connector Click
NOTICE
NOTE
1. 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.
2. Before connecting the DC connector to the inverter, measure the voltage of DC input power
cables using a multimeter. Ensure that the voltage of each string is within the specified range
(varies depending on the actual situation) and check that the polarities of the DC input power
cables are correct.
3. The open-circuit voltage of each DC input is always lower than or equal to 1000 V DC.
4. Check that DC input power cables will not be disconnected by pulling them.
NOTICE
1. RS485 communications cables can be connected to the terminal block or RJ45 ports. Connecting
to the terminal block is recommended.
2. It is recommended that the RS485 communications cable be routed through a pipe for protection.
The maximum pipe outer diameter allowed is 25.5 mm (1.00 in.).
3. Before connecting cables, remove the waterproof cable connector from the corresponding position.

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1. Install RS485 connectors.
1. Peel off the RS485 communications cables. 2. Connect the RS485 communications cables.
The figure shows the connector when the
surface without the fastener faces
upwards. The cable sequence numbers
and pins are defined as follows:
Method 1: Connecting to the
Terminal Block (Recommended)
The DJYP2VP2-22 2*2*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.
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 ohm/10 m (1.5 ohms/393.70 in.).
No. Pin Definition
1 RS485A, RS485 differential signal +
2 RS485B, RS485 differential signal -
3 NC
4 RS485A, RS485 differential signal +
5 RS485B, RS485 differential signal -
6 NC
7 NC
8 NC
3. Bind the RS485 communications cables.
NOTICE
1. Connect the communication cables to the COM1
(IN) and COM2 (OUT) 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.
3. Use OT terminals that use M4 screws to connect
the shield layer.
Method 2: Connecting to RJ45 Ports

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2. Connect the RS485 communications cables.
NOTICE
3. Bind the RS485 communications cables.
3 Installation Verification
1. The SUN2000 is installed correctly and securely. Yes □No □
2. All screws, especially the screws used for electrical connections, are
tightened. Yes □No □
3. All circuit breakers are switched to OFF. 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. DC input power cables are connected correctly and securely, with no open
circuit or short-circuit. Yes □No □
7. The DC input voltage is not higher than 1000 V and meets the local voltage
range requirements. 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 and RS485 ports and waterproof connectors are plugged with
waterproof plugs. Yes □No □
NOTICE
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 the unused COM2 waterproof cable connector with waterproof plugs.
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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4 System 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 voltage
exceeds 200 V.
Off
The inverter is disconnected from all
PV strings.
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 inverter is communicating properly.
Off
The inverter has failed to communicate.
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.

5 SUN2000 APP
Login screen Switch between users Main menu Quick settings
1. Tap to return to the login screen.
2. Inverter grid connection setup requires no parameter setting by default. The parameters can be
adjusted based on site requirements. For parameter settings, see the SUN2000-(25KTL, 30KTL)-
US User Manual.
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1. The SUN2000 application is a mobile application that enables the SUN2000 to communicate
with the SUN2000 monitoring system through a USB cable to query alarms, configure
parameters, and perform routine maintenance. The mobile application is a convenient platform
for monitoring and maintenance. The mobile application name is SUN2000.
2. Mobile operating system: Android 4.0 or later.
3. Access the Huawei app store (http://appstore.huawei.com) or Google Play
(https://play.google.com), search for SUN2000, and download the SUN2000 app software
package.
4. The SUN2000 communicates with its mobile application through a USB cable connected over
the USB port.
NOTE
NOTICE
NOTE
1. The password is the password used for logging in to the SUN2000 to which the app is connected.
This password is used only when the SUN2000 is connected to the app.
2. The initial password for Common User, Advanced User, and Special User is 00000a. Use the
initial password to log in to the inverter for the first time and change the password immediately to
ensure account security.
3. During the login, if an incorrect password is entered for five consecutive times (the interval
between two consecutive invalid password entries is less than 2 minutes), the account will be
locked for 10 minutes.

6 FAQ
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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?
6.1
What Is the Purpose of Measuring the Temperatures at the Joints
Between DC terminals and Connectors Using a Point-Test
Thermometer?
6.2
Appendix: Power Grid Code Mapping Table
No. Power Grid Standard Code Country and Condition
1 IEEE 1547-MV480 US medium-voltage power grid
Grid codes are subject to change. The listed codes are for your reference only.
For more information, refer to the channels provided on the following page.
NOTE

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