Huawei SUN2000-450W-P User manual

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The Smart PV Optimizer is a DC-DC converter installed on the rear of PV modules in a PV system.
It manages the maximum power point (MPP) of each PV module to improve the energy yield of the
PV system, and performs functions such as module-level shutdown and module-level management.
SUN2000-450W-P Smart PV Optimizer
Quick Guide
Issue: 02
Part Number: 31500AYH
Date: 2020-05-10
2Installing the Optimizer
1Product Overview
Type II
apparatus
(enhanced
insulation)
Burn
warning
Electric
shock
warning
Mounting
bracket
2. Install the optimizer based on the selected installation mode.
Properly plan the installation position of optimizers to ensure that the cables between the optimizer
and the PV module and between adjacent optimizers can be properly connected, and the
maximum communication distance between the optimizer and the solar inverter is within 350 m.
1. After determining the installation position of the optimizer, remove and attach the SN label.
or
Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved.

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Flange nut
Installed on an Extruded Aluminum
Profile –T-shaped Bolt
M8x20 T-shaped bolt
Extruded
aluminum profile
Prepare the bolt and nut by yourself.
The T-shaped bolt and nut can be
purchased from Huawei. The following
shows the bolt dimensions. Purchase the
bolt based on the extruded aluminum
profile.
Installed on a PV Module
Frame –Bolt Assembly
M8x20 bolt assembly
Flange nut
Before installation, ensure that a
mounting hole has been reserved on the
PV module frame.
Prepare the bolt assembly and nut by
yourself. Ensure that the bolt length
meets the installation requirements of
the PV module frame.
PV module
Installed on a PV Module Frame –Frame
Mounting Bracket (Front-mounted)
Do not press the optimizer
mounting ear against the
positioning pole of the frame
mounting bracket.
Purchase the frame mounting
bracket separately from Huawei.
Install the PV module after the
optimizer is installed.
PV module Frame mounting bracket
PV module Rooftop
Optimizer
Frame mounting
bracket
The front of the optimizer should
be at least 20 mm away from the
rooftop.

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3Installing the Optimizer Cables
PV module
RooftopOptimizer
PV module
Frame mounting bracket
The front of the optimizer should be
at least 10 mm away from the rear of
the PV module. The frame mounting
bracket should be at least 20 mm
away from the rooftop.
Installed on a PV Module Frame –Frame
MountingBracket (Rear-mounted)
Do not press the optimizer
mounting ear against the
positioning pole of the frame
mounting bracket.
Purchase the frame mounting
bracket separately from Huawei.
Install the PV module after the
optimizer is installed.
1. Connect the optimizer
input power cables. 2. Connect the positive probe of the multimeter to the positive
output terminal of the optimizer and the negative probe to the
negative output terminal. Check the output voltage and
resistance of a single optimizer.
PV module
connection box
Resistance
Cause
Suggestions
0.9 kΩ ≤ R1 ≤ 1.1 kΩ
The optimizer is normal.
N/A
R1 < 0.9 kΩ
If the probes of the
multimeter
are correctly connected, the
optimizer is faulty.
Replace the optimizer.
1.1 kΩ < R1

The sunlight is weak.

The optimizer input is not
connected.

The optimizer output is
connected to the PV module
output.

The optimizer is faulty.
1. Measure the resistance when the sunlight
is sufficient.
2.
Connect the optimizer input power cables.
3.
Correct the optimizer cable connection.
Connect the optimizer input power cables
to the output cables of the PV module.
4.
If the resistance is still abnormal, replace
the optimizer.
Frame mounting bracket
•The voltage V1 is 0 V.
•The resistance R1 is 1 kΩ
(±10%).
If the probes are reversely
connected, the measured
resistance is less than the
resistance measured when the
probes are correctly connected,
which might be less than 0.9 kΩ.

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Full Configuration of Optimizers
3. Check that the optimizer input is properly connected, and connect the output power cables to
the optimizer. Measure the PV string resistance when the sunlight is sufficient.
PV string
Common Exception Scenarios
The probes are
reversely connected.
The measured value
R2 is less than the
resistance measured
when the probes are
correctly connected.
The sunlight is weak:
1.1 kΩ < R1
The optimizer input
is not connected:
1.1 kΩ < R1
The optimizer output
is connected to the
PV module output:
1.1 kΩ < R1
PV string PV string
a. If R is infinite, an open circuit occurs in the PV string or the
cables are connected to different PV strings. Rectify the PV
string open-circuit fault and correctly group the PV string
cables.
b. If R4 is less than R3, A is the positive cable of the PV
string, and B is the negative cable of the PV string. If R3 is
less than R4, B is the positive cable of the PV string, and A
is the negative cable of the PV string. Attach correct cable
labels.

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Solar inverter
4. Connect cables between the PV string and the solar inverter.
4Power-On Commissioning
You can add an optimizer on the Quick settings screen and set its
physical layout on the Physical layout design of PV modules screen
of the solar inverter app. For details, see the corresponding solar
inverter quick guide or FusionSolar App Quick Guide. The solar inverter
quick guide is delivered with the solar inverter. You can scan the QR
code to obtain FusionSolar App Quick Guide.
1. Open the FusionSolar
app, log in to
intl.fusionsolar.huawei.co
m using the installer
account, choose My >
Device Commissioning,
and connect to the WLAN
hotspot of the solar
inverter.
2. Select installer and enter
the login password. Click
Log In. The device
commissioning screen is
displayed.
3. Choose Device
Monitoring, select the
PV string and check the
optimizer status.
5Troubleshooting
Optimizer status
Status
Description
Green
The optimizer is
running properly.
Gray
The optimizer is offline.
Check that the SN and
location information
are correct and search
for the device again.
Red
The optimizer is faulty.
Fault alarm
Fault
Alarm
Cause
Suggestions
Input overvoltage
The output voltage of the PV
module exceeds the maximum
input voltage of the optimizer.
Check whether the open
-circuit voltage of the PV
module connected to the optimizer exceeds 80 V.
Overtemperature
The ambient temperature
exceeds the upper threshold or
the optimizer is not installed as
required.
1.
Check the ventilation and ambient temperature
at the optimizer installation position. If the
ventilation is poor or the ambient temperature
exceeds the upper threshold, improve the
ventilation and heat dissipation.
2.
If the ventilation and ambient temperature are
normal, contact the installation contractor.
Internal hardware
fault
The optimizer is not properly
installed or is faulty.
Contact
the installation contractor.

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6Replacing an Optimizer
1. Power off the solar inverter and remove the
faulty optimizer. 2. Install a new optimizer and correctly connect its cables.
3. Power on the solar inverter. On the Device
Commissioning screen, choose
Maintenance > Add/Delete device, and
tap Auto search to add the new optimizer.
4. On the Device Commissioning screen,
choose Maintenance > Physical layout
design of PV modules, select the
corresponding PV module, and bind the new
optimizer. Click Submit.
1
2
3
4
7FAQ
Does the Optimizer Support Partial Configuration Scenarios?
7.1
The optimizer supports partial configuration scenarios. It can communicate with the solar inverter to
implement module-level management but does not support module-level shutdown.
The optimizer uses Staubli MC4 DC connectors. Ensure that the DC connectors to be connected
are of this model. If the DC connectors to be connected are not of the Staubli MC4 model, the
connector compatibility report and third-party lab (TUV, VED, or Bureau Veritas) report from the
DC connector manufacturer must be available. Using incompatible DC connectors may result in
serious consequences. The resulting device damage is beyond the warranty scope.
Full configuration scenario: For a single-phase solar inverter, the number of PV modules
connected in series in a PV string cannot exceed 25 and the maximum power of a PV string
cannot exceed 5 kW under any condition. For a three-phase solar inverter, the number of PV
modules connected in series in a PV string cannot exceed 50 and the maximum power of a PV
string cannot exceed 10 kW under any condition. Otherwise, the solar inverter may be damaged
and even a fire may occur.
Partial configuration scenario: The total open-circuit voltage of the PV modules in a PV string
cannot exceed the maximum input voltage of the solar inverter under any condition.
8Precautions

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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. You can
download this document by scanning the QR code.
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.
Carefully read this document prior to installation to get familiar with product information and
safety precautions. Huawei shall not be liable for any consequence caused by violation of the
storage, installation, and operation regulations specified in this document and the solar inverter
user manual.
Use insulated tools when installing the device. For personal safety, wear proper personal
protective equipment (PPE).
If an optimizer does not connect to any other device, connect the OUT+ and OUT–ports of the
optimizer respectively to the IN+ and IN–ports to protect the terminals from water.
It is recommended that the positive and negative cables (PV+/PV–) between the optimizer and
the solar inverter be placed side by side to avoid cable winding.
The input end of the optimizer should be connected to the PV module connection box, and the
output end to the adjacent optimizer or a solar inverter. Do not reversely connect the input and
output cables. Otherwise, the optimizer may be damaged.
The screenshots are for reference only. The actual screens prevail. Local physical layout using
the solar inverter is used as an example. For details about the remote physical layout using the
management system, see the FusionSolar App Quick Guide.

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