Huawei MERC Smart PV Optimizer Manuale utente
MERC Smart PV Optimizer
User Manual
Issue 05
Date 2023-03-31
HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Copyright © Huawei Digital Power Technologies Co., Ltd. 2023. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Digital Power Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei
Digital Power Technologies Co., Ltd. and the customer. All or part of the products, services and features
described in this document may not be within the purchase scope or the usage scope. Unless otherwise
specied in the contract, all statements, information, and recommendations in this document are
provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every eort 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.
Huawei Digital Power Technologies Co., Ltd.
Address: Huawei Digital Power Antuoshan Headquarters
Futian, Shenzhen 518043
People's Republic of China
Website: https://e.huawei.com
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. i
About This Document
Purpose
This document describes the functions, electrical specications, and structure of
the smart photovoltaic (PV) optimizer.
Figures provided in this document are for reference only.
Intended Audience
This document is intended for:
● Sales engineers
● Technical support engineers
● Maintenance engineers
Symbol Conventions
The symbols that may be found in this guide are dened as follows.
Symbol Description
Indicates a hazard with a high level of risk which, if
not avoided, will result in death or serious injury.
Indicates a hazard with a medium level of risk which,
if not avoided, could result in death or serious injury.
Indicates a hazard with a low level of risk which, if
not avoided, could result in minor or moderate
injury.
Indicates a potential hazard which, if not avoided,
could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to
personal injury.
MERC Smart PV Optimizer
User Manual About This Document
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. ii
Symbol Description
Supplements the important information in the main
text.
NOTE is used to address information not related to
personal injury, equipment damage, and
environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue
contains all updates made in previous issues.
Issue 05 (2023-03-31)
● Updated 1 Safety Information.
● Updated 2.3 Conguration Principles.
● Updated 3 System Maintenance.
Issue 04 (2023-02-10)
● Updated 2.4 Application Scenarios.
● Updated 3.1 Setting the Physical Layout of the Smart PV Optimizers.
Issue 03 (2022-11-30)
● Updated 2.2 Structure.
● Updated 2.3 Conguration Principles.
● Updated 2.4 Application Scenarios.
● Updated 3.1 Setting the Physical Layout of the Smart PV Optimizers.
● Updated 3.2 Detecting Optimizer Disconnection.
● Updated 3.5 Replacing an Optimizer.
Issue 02 (2022-09-20)
● Updated 2.3 Conguration Principles.
● Updated 3.4 Troubleshooting.
● Updated 4 Technical Specications.
Issue 01 (2022-08-30)
This issue is the rst ocial release.
MERC Smart PV Optimizer
User Manual About This Document
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. iii
Contents
About This Document................................................................................................................ ii
1 Safety Information.................................................................................................................. 1
1.1 Personal Safety.........................................................................................................................................................................2
1.2 Electrical Safety........................................................................................................................................................................4
1.3 Environment Requirements................................................................................................................................................. 8
1.4 Mechanical Safety.................................................................................................................................................................10
2 Product Introduction............................................................................................................ 14
2.1 Overview.................................................................................................................................................................................. 14
2.2 Structure...................................................................................................................................................................................15
2.3 Conguration Principles..................................................................................................................................................... 16
2.4 Application Scenarios.......................................................................................................................................................... 17
3 System Maintenance............................................................................................................ 19
3.1 Setting the Physical Layout of the Smart PV Optimizers....................................................................................... 19
3.2 Detecting Optimizer Disconnection................................................................................................................................21
3.3 Rapid Shutdown.................................................................................................................................................................... 22
3.4 Troubleshooting..................................................................................................................................................................... 23
3.5 Replacing an Optimizer...................................................................................................................................................... 24
3.6 Maintaining PV Modules.................................................................................................................................................... 26
4 Technical Specications....................................................................................................... 28
A Acronyms and Abbreviations............................................................................................. 30
MERC Smart PV Optimizer
User Manual Contents
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. iv
1 Safety Information
Statement
Before transporting, storing, installing, operating, using, and/or maintaining
the equipment, read this document, strictly follow the instructions provided
herein, and follow all the safety instructions on the equipment and in this
document. In this document, "equipment" refers to the products, software,
components, spare parts, and/or services related to this document; "the Company"
refers to the manufacturer (producer), seller, and/or service provider of the
equipment; "you" refers to the entity that transports, stores, installs, operates,
uses, and/or maintains the equipment.
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. The
Company shall not be liable for any consequences that may arise due to
violations of safety requirements or safety standards concerning the design,
production, and usage of the equipment.
The equipment should be used in an environment that meets the design
specications. Otherwise, the equipment may be faulty, malfunctioning, or
damaged, which is not covered under the warranty. The Company shall not be
liable for any property loss, personal injury, or even death caused thereby.
Comply with applicable laws, regulations, standards, and specications during
transportation, storage, installation, operation, use, and maintenance.
Do not perform reverse engineering, decompilation, disassembly, adaptation,
implantation, or other derivative operations on the equipment software. Do not
study the internal implementation logic of the equipment, obtain the source code
of the equipment software, violate intellectual property rights, or disclose any of
the performance test results of the equipment software.
The Company shall not be liable for any of the following circumstances or
their consequences:
● The equipment is damaged due to force majeure such as earthquakes, oods,
volcanic eruptions, debris ows, lightning strikes, res, wars, armed conicts,
typhoons, hurricanes, tornadoes, and other extreme weather conditions.
● The equipment is operated beyond the conditions specied in this document.
MERC Smart PV Optimizer
User Manual 1 Safety Information
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. 1
● The equipment is installed or used in environments that do not comply with
international, national, or regional standards.
● The equipment is installed or used by unqualied personnel.
● You fail to follow the operation instructions and safety precautions on the
product and in the document.
● You remove or modify the product or modify the software code without
authorization.
● You or a third party authorized by you cause the equipment damage during
transportation.
● The equipment is damaged due to storage conditions that do not meet the
requirements specied in the product document.
● You fail to prepare materials and tools that comply with local laws,
regulations, and related standards.
● The equipment is damaged due to your or a third party's negligence,
intentional breach, gross negligence, or improper operations, or other reasons
not related to the Company.
1.1 Personal Safety
D ANGER
Ensure that power is o during installation. Do not install or remove a cable with
power on. Transient contact between the core of the cable and the conductor will
cause electric arcs, sparks, re, or explosion, which may result in personal injury.
D ANGER
Non-standard and improper operations on the energized equipment may cause
re, electric shocks, or explosion, resulting in property damage, personal injury, or
even death.
D ANGER
Before operations, remove conductive objects such as watches, bracelets, bangles,
rings, and necklaces to prevent electric shocks.
D ANGER
During operations, use dedicated insulated tools to prevent electric shocks or short
circuits. The dielectric withstanding voltage level must comply with local laws,
regulations, standards, and specications.
MERC Smart PV Optimizer
User Manual 1 Safety Information
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. 2
D ANGER
During operations, wear personal protective equipment such as protective
clothing, insulated shoes, goggles, safety helmets, and insulated gloves.
Figure 1-1 Personal protective equipment
General Requirements
● Do not stop protective devices. Pay attention to the warnings, cautions, and
related precautionary measures in this document and on the equipment.
● If there is a likelihood of personal injury or equipment damage during
operations, immediately stop, report the case to the supervisor, and take
feasible protective measures.
● Do not power on the equipment before it is installed or conrmed by
professionals.
● Do not touch the power supply equipment directly or with conductors such as
damp objects. Before touching any conductor surface or terminal, measure
the voltage at the contact point to ensure that there is no risk of electric
shock.
● Do not touch operating equipment because the enclosure is hot.
● In the case of a re, immediately leave the building or the equipment area
and activate the re alarm or call emergency services. Do not enter the
aected building or equipment area under any circumstances.
Personnel Requirements
● Only professionals and trained personnel are allowed to operate the
equipment.
– Professionals: personnel who are familiar with the working principles and
structure of the equipment, trained or experienced in equipment
operations and are clear of the sources and degree of various potential
hazards in equipment installation, operation, maintenance
– Trained personnel: personnel who are trained in technology and safety,
have required experience, are aware of possible hazards on themselves in
MERC Smart PV Optimizer
User Manual 1 Safety Information
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. 3
certain operations, and are able to take protective measures to minimize
the hazards on themselves and other people
● Personnel who plan to install or maintain the equipment must receive
adequate training, be able to correctly perform all operations, and understand
all necessary safety precautions and local relevant standards.
● Only qualied professionals or trained personnel are allowed to install,
operate, and maintain the equipment.
● Only qualied professionals are allowed to remove safety facilities and inspect
the equipment.
● Personnel who will perform special tasks such as electrical operations,
working at heights, and operations of special equipment must possess the
required local qualications.
● Only authorized professionals are allowed to replace the equipment or
components (including software).
● Only personnel who need to work on the equipment are allowed to access
the equipment.
1.2 Electrical Safety
D ANGER
Before connecting cables, ensure that the equipment is intact. Otherwise, electric
shocks or re may occur.
D ANGER
Non-standard and improper operations may result in re or electric shocks.
D ANGER
Prevent foreign matter from entering the equipment during operations. Otherwise,
equipment damage, load power derating, power failure, or personal injury may
occur.
WARNING
For the equipment that needs to be grounded, install the ground cable rst when
installing the equipment and remove the ground cable last when removing the
equipment.
MERC Smart PV Optimizer
User Manual 1 Safety Information
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. 4
General Requirements
● Follow the procedures described in the document for installation, operation,
and maintenance. Do not reconstruct or alter the equipment, add
components, or change the installation sequence without permission.
● Obtain approval from the national or local electric utility company before
connecting the equipment to the grid.
● Observe the power plant safety regulations, such as the operation and work
ticket mechanisms.
● Install temporary fences or warning ropes and hang "No Entry" signs around
the operation area to keep unauthorized personnel away from the area.
● Before installing or removing power cables, turn o the switches of the
equipment and its upstream and downstream switches.
● If any liquid is detected inside the equipment, disconnect the power supply
immediately and do not use the equipment.
● Before performing operations on the equipment, check that all tools meet the
requirements and record the tools. After the operations are complete, collect
all of the tools to prevent them from being left inside the equipment.
● Before installing power cables, check that cable labels are correct and cable
terminals are insulated.
● When installing the equipment, use a torque tool of a proper measurement
range to tighten the screws. When using a wrench to tighten the screws,
ensure that the wrench does not tilt and the torque error does not exceed
10% of the specied value.
● Ensure that bolts are tightened with a torque tool and marked in red and blue
after double-check. Installation personnel mark tightened bolts in blue.
Quality inspection personnel conrm that the bolts are tightened and then
mark them in red. (The marks should cross the edges of the bolts.)
● After the installation is complete, ensure that protective cases, insulation
tubes, and other necessary items for all electrical components are in position
to avoid electric shocks.
● If the equipment has multiple inputs, disconnect all the inputs before
operating the equipment.
● Before maintaining a downstream electrical or power distribution device, turn
o the output switch on the power supply equipment.
● During equipment maintenance, attach "Do not switch on" labels near the
upstream and downstream switches or circuit breakers as well as warning
signs to prevent accidental connection. The equipment can be powered on
only after troubleshooting is complete.
● If fault diagnosis and troubleshooting need to be performed after power-o,
take the following safety measures: Disconnect the power supply. Check
whether the equipment is live. Install a ground cable. Hang warning signs and
set up fences.
● Do not open equipment panels.
MERC Smart PV Optimizer
User Manual 1 Safety Information
Issue 05 (2023-03-31) Copyright © Huawei Digital Power Technologies Co., Ltd. 5
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