Huawei SUN2000-600W-P User manual

HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

SUN2000-(600W-P, 450W-P2) Smart PV Optimizer

Quick Guide

Issue: 02

Part Number: 31500GLF

Date: 2022-02-20

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.

1Product Overview

Mounting bracket

SUN2000-600W-P (Short Input Cable)/SUN2000-450W-P2

SUN2000-600W-P (Long Input Cable)

The length of the input power cable delivered with the optimizer is 150 mm. Select PV modules

with appropriate cable length to ensure that the optimizer can connect to PV modules.

The length of the input power cable delivered with the optimizer is 1000 mm. Select PV modules

with appropriate cable length to ensure that the optimizer can connect to PV modules.

Type II apparatus

(enhanced insulation)

Burn

warning

Electric shock

warning

EU waste electrical and

electronic equipment (WEEE)

mark

Refer to

documentation

Type II apparatus

(enhanced insulation)

Burn

warning

Electric shock

warning

EU waste electrical and

electronic equipment (WEEE)

mark

Refer to

documentation

Mounting bracket

2Installing the Device

Installation Requirements

2.1

Clearance

2. Improper operations during the

installation and running of optimizers

may cause fire. Do not store flammable

or explosive materials in the installation

area.

1. Do not install the optimizers in a position

that might be soaked in water for two

hours or longer.

Water

Cable

cutter

3. Do not cut the cables delivered with the

optimizers. Otherwise, the warranty will be

voided.

4. Avoid direct sunlight.

Flange nut

Installed on an Extruded Aluminum

Profile –T-shaped Bolt

M8x20 T-shaped bolt

Extruded

aluminum

profile

•The optimizer is mounted to an aluminum

profile on the front or rear side with T-

shaped bolt and nut.

•The T-shaped bolt and nut need to be

purchased separately from Huawei. The

bolt dimensions are as follows.

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.

The bolt assembly and nut need to be

purchased from a third party. Ensure

that the length meets the installation

requirements of the PV module frame.

PV module

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 the SN label from the

optimizer and attach it to the physical layout template. For details, see instructions on the

back of the physical layout template.

Installing the Optimizer

2.2

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

3Installing the Optimizer Cables

1. Connect the optimizer

input (IN) cable to

the PV module

connection box.

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.

Connect the optimizer input power cables.

Correct the optimizer cable connection.

Connect the optimizer input power cables to

the output cables of the PV module.

If the resistance is still abnormal, replace

the optimizer.

•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.

Ensure that the input (IN) and output (OUT) cables of the optimizer are correctly connected. If

they are reversely connected, the device may be damaged.

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

The measurement precision of the PV string output resistance depends on the resistance setting

of the multimeter. Select the lowest resistance setting that can meet the measurement

requirements.

Solar inverter

4. Connect cables between the PV string and the solar inverter.

4Power-On Commissioning

1. The physical layout of the optimizers must be provided so that you can easily locate faulty

optimizers based on the physical layout diagram.

2. The physical layout of the optimizers must be provided to use the optimizer disconnection

detection function. After optimizer disconnection detection is performed, the locating result

can be viewed on the Optimizer layout page.

3. Choose Maintenance > Subdevice management > Auto search to add an optimizer. Create

a physical layout on the Physical layout design screen. 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

Physical

layout

PV rooftop

Location

Faulty optimizer

Disconnection icon Fault icon

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.

c. The resistance of each pair of PV module and optimizer is

1 kΩ. The total resistance of a PV string is 1 kΩ times the

number of optimizers. If the total resistance is 10 kΩ, the

number of optimizers in the PV string is 10.

Note: The total resistance of a PV string is (R3 + R4)/2.

1. Open the FusionSolar app, log in to intl.fusionsolar.huawei.com using the installer account,

choose Me > 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

Cause

Suggestions

Input

overvoltage

Optimizer input

overvoltage

occurred.

Check whether the open

-circuit voltage of the PV module

connected to the optimizer exceeds 80 V.

Overtemperature

protection

The optimizer

internal

temperature is

too high.

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.

If the ventilation and ambient temperature are normal,

contact your dealer or Huawei technical support.

Internal

hardware fault

An internal fault

occurred in the

optimizer.

Contact your dealer or Huawei technical support.

utput

backfeed

Optimizer

output backfeed

occurred.

Check whether PV modules are severely blocked when PV

strings are connected in parallel.

If the fault persists, contact your dealer or Huawei technical

support.

Abnormal output

voltage

The optimizer

output voltage

is abnormal.

When the sunlight is normal, perform the optimizer search

function again.

2. Check whether the optimizer output extension cable is correct

(positive connector at one end and negative connector at the

other).

Check whether the PV string is correctly connected to the

inverter or whether there is a breakpoint in the PV string.

If the fault persists, contact your dealer or Huawei technical

support.

If the system has change requirements, such as adding, deleting, and replacing an optimizer,

adjusting the physical position of an optimizer, or adjusting the PV string connected to the solar

inverter input, power off the inverter and wait for 5 minutes before performing the change

operation to avoid human injuries. After the change is performed, the optimizer search process

must be performed again and the physical layout diagram must be updated. Otherwise, the

networking is incomplete, optimizer faults cannot be located, or the system fails.

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 > Subdevice management,

and tap Auto search to add the new

optimizer.

4. On the Device Commissioning screen,

choose Maintenance > Optimizer layout,

select the corresponding PV module, and

bind the new optimizer. Click Submit.

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.

The optimizer is not supported in the pure off-grid ESS networking. Otherwise, the system may

fail to start.

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.

7Precautions

Fault

Alarm

Cause

Suggestions

Upgrade

failed

The optimizer

software

upgrade failed.

1. When the sunlight is normal, perform the optimizer upgrade

again.

If the fault persists, contact your dealer or Huawei technical

support.

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.

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 may vary. 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

8Installation Video

You can scan the QR codes below to obtain the installation videos.

中文 English

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