CanadianSolar EP CUBE User manual

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Installation Manual V2.1

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ABOUT THIS MANUAL……………………….......................................................................................................................................................... 04
1.1 Applicable Products……….......................................................................................................................................................................04
1.2 Intended Target Group...........................................................................................................................................................................04
1.3 Scope of This Manual …...................................................................................................................................................................04
1.4 Copyright ……………………………..................................................................................................................................................................05
1.5 Disclaimer................................................................................................................................................................................................05
1.6 Declaration of Conformity...............................................................................................................................................................05
1.7 Abbreviated Terms...................................................................................................................................................................................05
1.8 Contact Us..................................................................................................................................................................................................06
SAFETY INSTRUCTIONS……………....................................................................................................................................................................07
1. Conduct in Case of Fire............................................... ...........................................................................................................................07
2. General and Personal Safety.................................................................................................................................................................08
3. Personnel Requirements....................................................................................................................................................................... 09
4. Personal Protective Equipment............................................................................................................................................................ 10
5. Electrical Safety........................................................................................................................................................................................ 10
5.1 General Requirements........................................................................................................................................................................ 10
5.2 Cabling Requirements......................................................................................................................................................................... 10
5.3 Operation................................................................................................................................................................................................ 11
5.4 Battery Safety........................................................................................................................................................................................ 11
5.5 Storage Requirements........................................................................................................................................................................ 12
5.6 Transportation Requirements.......................................................................................................................................................... 12
5.7 Installation Environment Requirements........................................................................................................................................ 13
5.8 Commissioning.................................................................................................................................................................................... 14
5.9 Maintenance and Replacement...................................................................................................................................................... 14
PRODUCT DESCRIPTION..................................................................................................................................................................................15
1. Appearance.................................................................................................................................................................................................... 15
1.1 EP Cube HES........................................................................................................................................................................................ 15
A. EP Cube PCS..................................................................................................................................................................................... 16
B. EP Cube Battery Module................................................................................................................................................................ 17
C. EP Cube Base.................................................................................................................................................................................... 17
D. EP Cube AC Switch Box................................................................................................................................................................. 18
CONTENTS

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2. Operation Modes ....................................................................................................................................................................................19
2.1. Self-Consumption Mode................................................................................................................................................................19
2.2. Backup Mode.....................................................................................................................................................................................19
2.3. Time of Use Mode............................................................................................................................................................................20
3. Warning Labels Description..................................................................................................................................................................21
4. Product Labels……………….………….............................................................................................................................................................22
EP Cube INSTALLATION ................................................................................................................................................................................23
1. Installation Site Requirements............................................................................................................................................................23
2. On site Installation………………….................................................................................................................................................................27
3. Installation of AC Switch Box............................................................................................................................................................... 43
THE EP Cube SYSTEM ......................................................................................................................................................................................44
1. System Topology……….............................................................................................................................................................................44
WIRING & COMMISSIONING...........................................................................................................................................................................46
1. EP Cube system wiring.........................................................................................................................................................................46
1.1. Wiring from Solar Panels to EP Cube PCS ............................................................................................................................... 47
1.2. AC Wiring from EP Cube PCS to AC Switch Box........................................................................................................................49
1.3. Wiring of Other Components......................................................................................................................................................... 54
2. EP Cube Commissioning.......................................................................................................................................................................57
2.1. EP Cube startup...............................................................................................................................................................................57
2.2. Commissioning Via EP Cube App ...............................................................................................................................................59
3. EP Cube Energize and De-energize.....................................................................................................................................................70
3.1. EP Cube Energize............................................................................................................................................................................70
3.2. EP Cube De-energize……………………................................................................................................................................................72
TROUBLESHOOTING & MAINTENANCE…...................................................................................................................................................74
APPENDIX................................................................................. ...........................................................................................................................75

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About this Manual
➢Read this manual carefully in its entirety before installation / operation.
➢Retain this manual for reference purposes.
1.1. Applicable Products
This manual is valid for the EP Cube HES Series Only. EP Cube HES series includes following products:
EP Cube HES-EU1-706G;
EP Cube HES-EU1-710G;
EP Cube HES-EU1-713G;
EP Cube HES-EU1-716G;
EP Cube HES-EU1-720G;
1.2. Intended Target Group
The instructions contained in this installation manual must only be performed by qualified EP
authorized personnel who must have completed installer training program provided by EP.
Prior skills required before taking installations are following:
Understanding of how batteries and inverters work, and they are operated
Understanding and complying with the local standards, directives and electrical connection
requirements
Training in dealing with the hazards associated with the installation and operation of electrical
equipment and lithium batteries
Training in the installation and commissioning of electrical equipment
1.3. Scope of this Manual
This manual describes the installation process and provides a set of guidelines for EP Cube system
installers. It provides system’s an overview of the system and installation instructions, electrical
connections, commissioning, operation, expansion, decommissioning, troubleshooting, maintenance
and storage. Please read thoroughly this manual before installation and follow the instructions during
the entire installation process.
If you have any further queries regarding the product, please contact the EP Cube service team.
WARNING: EP Cube products can only be installed, repaired, replaced and
maintained by the EP authorized personnel for safety and warranty purposes.

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1.4. Copyright
All rights reserved. The disclosure, duplication, distribution, and editing of this document, or
utilization and communication of the content are not permitted unless authorized in writing. All
rights, including rights created by patent grant or registration of a utility model or a design, are
reserved.
1.5. Disclaimer
This document has gone through rigorous technical review before being published to provide
accurate information. However, EP believes in striving for continuous improvement of our
products and specifications may change without prior notice. Thus, it will be revised regularly
and any modifications and amendments will be included in subsequent issues. The illustrations
and images in this manual are for demonstration purposes only. The responsibility of a safe and
quality installation is of the qualified and licensed installation professional. Actual product
details may vary in appearance on the installation site.
1.6. Declaration of Conformity
EP Cube system described in this manual complies with the applicable European directives. The
certificate of compliance and completed certifications can be found in the download section of
EP Cube website: https://eternalplanetenergy.com/EN/manuals.html
1.7. Abbreviated Terms
ABBR Description
AC Alternating Current
CT Current Transducer
DC Direct Current
kW Kilowatt
L Live
N Neutral
PV Photovoltaic

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1.8. Contact Us
Eternalplanet Energy Co. Ltd
Service Hotline: [phone]
Email: [e-mail], (For Spain only)
Email: [e-mail] , (For Italy only)
Email: [e-mail] , (For Germany only)

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1. Conduct In case of fire
Caution
➢Immediately contact the fire department or other relevant emergency response team.
➢Notify all people who might be affected and ensure that they are able to evacuate this area.
In the event of fire or potential risk of battery modules or storage system catching fire:
1. Leave or do not enter the room in which the storage system and battery modules are located.
2. Avoid contact with escaping smoke or steam. If contact occurs, rinse the affected area thoroughly
with water. In the case of irritation of the skin, eyes or mucous membranes, consult a doctor.
3. Contact the fire department.
4. Contact the EP service team for more instructions on how to handle EP Cube system.
5. There is a danger of electrocution when extinguishing a fire while the storage system is switched
on.In the event of a fire in the vicinity of the product or in the storage system itself, proceed as
follows before beginning any extinguishing measures:
a. Switching the storage system off to electrically isolate it. The battery modules will still be carrying
voltage and stored power.
b. Switch off the mains circuit breakers/fuses in the building.
c. Only firefighters with appropriate personal protective equipment are permitted to enter the room
where the storage system is located.
SAFETY INSTRUCTIONS
Please read this section carefully and strictly implement its contents for personal protection and
property safety before installing and using the product. EP is not liable for any loss caused by the
violation of the instructions in this manual and relevant instructions on the equipment. All
descriptions in the manual are for guidance only.
Ensure that the equipment is used in environments that meet its design specifications. Otherwise,
it may result in equipment malfunction, component damage, personal injuries, and/or property
damage.
All installations and maintenance should be performed by trained and knowledgeable technicians
who are familiar with local standards and safety regulations. The safety instructions in this
document are only supplemental to local laws and regulations.
DANGER: Indicates the situation which, if not avoided, will lead to death or serious injury.
CAUTION: Indicates the situation which, attention is necessary to avoid potential injury or
property
damage.

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d. If the storage system or mains fuses cannot be safely switched off: Observe the minimum
distances applicable for the specific extinguishing means used.
The storage system works with a nominal voltage of 230 V (AC) and 230.4 V (DC).
Extinguishing agents
1. A fire can be extinguished using conventional extinguishing agents. i.e. ABC or carbon
dioxide.
2. Water is recommended as an extinguishing agent in order to cool the battery modules and
therefore prevent thermal runaway in battery modules which are still intact.
DANGER:
EP Cube consists of EP Cube PCS and battery modules that are considerably heavy!
It is recommended to use lifting equipment to avoid any potential injuries.
Do not stack the unpacked products to avoid irreversible damage.
Ensure that the power switch and the breaker of the EP Cube are always turned off prior to all
installation, replacement, and maintenance processes.
Do not attempt to open, disassemble, tamper with, or modify the EP Cube without prior
written approval from the EP company.
Do not operate the EP Cube out of the specified conditions and requirements.
It is prohibited to touch the EP Cube internal components when it's running.
Do not place the EP Cube or its components in water or other liquids.
Do not expose EP Cube to flammable gases, other corrosive substances, and heating
sources.
Do not short-circuit the terminals of the battery modules to avoid causing electric shock and
fire.
Do not stand on, lean on, or sit on the top of EP Cube.
Do not use water to clean electrical components inside or outside of a cabinet.
2. General and Personal Safety

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3. Personnel Requirements
Personnel who plan to install or maintain EP Cube equipment must receive thorough
training, understand all necessary safety precautions, and be able to correctly perform all
operations.
Only qualified professionals or trained personnel are allowed to install, operate, and
maintain the equipment.
Only qualified professionals are allowed to remove safety facilities and inspect the
equipment.
Personnel who will operate the equipment, including operators, trained personnel, and
professionals, should possess the local national required qualifications in special
operations such as high-voltage operations, working at heights, and operations of special
equipment.
Only professionals or authorized personnel are allowed to replace the equipment or
components (including software).
CAUTION:
The transportation, installation, and commissioning of the EP Cube must be carried out under
the specified conditions. Do not expose EP Cube to extreme conditions during these periods.
EP Cube can only be installed, repaired, replaced, and maintained by the EP authorized
personnel for safety and warranty purposes. PPE must be worn during any operations.
Do not place foreign objects on top of the product or insert inside the product.
Ensure there is enough space around EP Cube for ventilation.
Be careful to protect the EP Cube from impact when installing it in a garage or near vehicles. If
possible, install the EP Cube on a side wall or above the height of vehicle bumpers.
Do not try reverse engineering, decompile, disassemble, adapt, implant, or perform other
derived operations on the EP Cube firmware.
Do not study the internal implementation of the product firmware source code and steal
intellectual property rights.
Professionals
personnel who are trained or experienced in equipment operations and
are clear of the sources and degree of various potential hazards in
equipment installation, operation, and maintenance
Trained personnel
personnel who are technically trained, have required experience, are
aware of possible hazards on themselves in certain operations, and are
able to take protective measures to minimize the hazards on
themselves and other people
Operators
operation personnel who may come in contact with the equipment,
except trained personnel and professionals

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4. Personal Protective Equipment
Wear the following safety equipment properly to perform installations. Installers must meet the
relevant requirements of applicable standards and local laws.
Safety goggles Ear plugs Insulated gloves Safety gloves Safety shoes
5. Electrical Safety
5.1 General Requirements
1. Ensure that all electrical connections comply with local electrical standards.
2. Obtain approval from the local electric utility company before using the equipment in grid-tied
mode.
3. Ensure that the cables you prepared meet local regulations.
4. Use dedicated insulated tools when performing high-voltage operations.
5.2 Cabling Requirements
1. When routing cables, ensure that a distance of at least 30 mm exists between the cables and
heat-generating components or areas. This prevents damage to the insulation layer of the cables.
2. Bind cables of the same type together. When routing cables of different types, ensure that they
are at least 30 mm away from each other.
3. Ensure that the cables used in a grid-tied PV power system are properly connected and
insulated and meet specifications.
4. In sections where cables are routed through pipes or holes, these cables must be protected to
prevent from being damaged by sharp edges or burrs.
5. When the temperature low, violent impact or vibration may damage the plastic cable sheathing.
To ensure safety, comply with the following requirements:
a. Cables must be laid or installed only when the temperature is higher than 0°C. Handle cables
with caution, especially at a low temperature.
b. Cables stored at sub-zero temperatures must be put at room temperature for at least 24 hours
before they are laid out.

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6. For the equipment that needs to be grounded, install the protective earthing (PE) cable first
when installing the equipment and remove the PE cable last when removing the equipment.
7. Do not damage the ground conductor.
8. Do not operate the equipment in the absence of a properly installed ground conductor.
9. Ensure that the equipment is connected permanently to the protective ground. Before operating
the equipment, check the electrical connection to ensure that it is securely grounded.
5.3 Operation
1. Do not connect or disconnect power cables with power-on. Transient contact between the core
of the power cable and the conductor will generate electric arcs or sparks, which may cause fire or
personal injury.
2. Before connecting cables, switch off the breaker of the upstream equipment to cut off the
power supply if people may contact energized components.
3. Before connecting a power cable, check that the label on the power cable is correct.
4. If the equipment has multiple inputs, disconnect all the inputs before operating the inverter
5.4 Battery Safety
1. The packaged battery modules are forbidden to be stacked more than the specified quantity. In
addition, do not stand, lean on or sit on the product.
2. High temperatures, heating equipment, or sources of extreme heat, may cause the battery to go
in a thermal runaway, thereby exceeding the ignition point of its material, causing a fire hazard.
Please refer to applicable local requirements and norms on residential buildings, fire and energy
storage system.
3. To avoid leakage, overheating or fire, do not disassemble, alter, or damage batteries. For
example, do not insert foreign objects into batteries or place batteries in water or other liquids.
4. Do not squeeze, impact or puncture the battery.
5. Do not short circuit the battery terminals.
6.Do not reverse the polarity of the battery during cable connections.
7. The fire hazard of the lithium-ion/sodium-ion battery energy storage system is high. Consider
the following safety risks before handling batteries:
a. Battery electrolyte is combustible, toxic, and volatile.
b. Battery thermal runaway can generate flammable and harmful gases such as CO and HF.

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5.5 Storage Requirements
1. The storage environment must comply with local regulations and standards.
2. If a battery has been stored for longer than the allowed period, it must be checked and tested by
professionals before use.
3. Place batteries according to the signs on the packing case during storage. Do not put batteries
upside down or sidelong.
4. Stack packed batteries in compliance with the stacking instructions on the external package.
5. Handle batteries with caution to avoid damage. The storage environment requirements are as
follows:
a. Ambient temperature: -10–55˚C;
b. Recommended storage temperature: 20–30˚C
c. Relative humidity: 5% to 80%
6. The batteries must be stored in a clean, dry, and well-ventilated place and be protected from
dust and water vapor corrosion. Keep batteries away from direct sunlight, rain and water.
5.6 Transportation Requirements
Before transportation:
1. Check that the batteries are intact and there is no obvious smell, smoke, or fire. Otherwise, the
batteries cannot be transported.
During transportation:
1. The batteries cannot be transported by rail or air.
2. Maritime transport must comply with the International Maritime Dangerous Goods Code (IMDG
Code).
3. Road transport must comply with the International Carriage of Dangerous Goods by Road (ADR).
4. Comply with the requirements of the transportation regulatory authorities in the countries of
departure, route, and destination.
5. Comply with the international regulations on the transport of dangerous goods and the
requirements of the transport regulatory authorities of the respective countries.
6.Protect the product packing box from the following situations:
a. Being dampened by rains, snows, or falling into water
b. Falling or mechanical impact.
c. Being upside-down or tilted.

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5.7 Installation Environment Requirements
1. The installation and use environment must meet regarding international, national, and local
standards for lithium batteries, and are in accordance with the local laws and regulations.
2. Ensure that the EP Cube is not accessible to children and installed away from daily working or
living areas, including but not limited to the following areas: studio, bedroom, lounge, living room,
music room, kitchen, study, game room, home theatre, sunroom, restroom, laundry, and attic.
3. When installing the EP Cube in a garage, keep it away from the drive way. It is recommended
that the battery is mounted on the wall higher than the car bumper to prevent collision.
4. When installing the EP Cube in a basement, keep good ventilation. Do not place flammable or
explosive materials around the battery. It is recommended that the battery is mounted on the wall
to avoid contact with water.
5. Install the EP Cube in a dry and well-ventilated environment. Secure the EP Cube on a solid and
flat surface.
6. Install the EP Cube in a sheltered place or install an awning over it to avoid direct sunlight or rain.
7. Install the EP Cube in a clean environment that is free from sources of strong infrared radiation,
organic solvents, and corrosive gases.
8. For areas prone to natural disasters such as floods, debris flows, earthquakes, and
typhoons/hurricanes, take corresponding precautions for installation.
9. Keep the EP Cube away from fire sources. Do not place any flammable or explosive materials
around the EP Cube .
10. Keep the EP Cube away from water sources such as taps, sewer pipes, and sprinklers to
prevent water seepage.
11. Do not install the EP Cube in a position where it is easy to touch as the temperature of the
chassis and heat sink is high when the EP Cube is running.
12. To prevent fire due to high temperature, ensure that the vents are not blocked when the EP
Cube is running.
13. Do not expose the EP Cube to flammable or explosive gas or smoke. Do not perform any
operation on the EP Cube in such environments.
14. Do not install the EP Cube on a moving object, such as ship, train, or car.
15. In backup power scenarios, do not use the EP Cube for the following situations: medical
devices substantially important to human life, control equipment such as trains and elevators
which may cause personal injury, locations near medical devices, other devices similar to those
described above
16. Do not install the battery outdoors in salt-affected areas because it may corrode. A salt-
affected area refers to the region within 1000 meters from the coast or prone to sea breeze. The
regions prone to sea breeze vary with weather conditions.

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5.8 Commissioning
When the equipment is powered on for the first time, ensure that an EP certified installer performs
the configurations for the product correctly. Incorrect configuration may result in inconsistency
with local regulations and affect the normal operation of the equipment.
5.9 Maintenance and Replacement
1. Maintain the equipment regularly with the help of the knowledge contained in this manual and
using proper tools and testing equipment.
2. Before maintaining the equipment, power it off and follow the instructions on the High
Voltage/Delayed Discharge label to ensure that the equipment is powered off(5 minutes after the
shutdown).
3. Place temporary warning signs or build fences to prevent unauthorized access to the
maintenance site.
4. If the equipment is faulty, contact your installer or distributor.
5. The equipment can be powered on only after all faults are rectified. Failing to do so may
escalate in more faults or could damage the equipment.
6. Do not open the cover without prior authorization from EP. Otherwise, electric shocks may occur,
and the resulting faults are beyond warranty scope.
7. Installation personnel, maintenance personnel, and technical support personnel must be trained
to operate and maintain the equipment safely and correctly by taking comprehensive
precautionary measures, and by being equipped with PPE.
8. Before moving or reconnecting the equipment, disconnect the main breakers and batteries, then
wait for five minutes until the equipment powers off. Before maintaining the equipment, check that
no dangerous voltages remain in the DC bus or components to be maintained by using a multi-
meter.
9. Battery modules replacements should be carried out or supervised by personnel who are
familiar with batteries and the precautions required.
10. When replacing battery modules, replace them with battery modules of the same type.
11. Take out all tools and parts used from the equipment after maintenance is complete.
12. If the equipment is not used for along time, store and recharge battery modules according to
this manual.

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The EP Cube HES consists of EP Cube PCS and Battery Modules as standard component. Optional
accessories are also available besides EP Cube HES and users can choose according to site and
customer-specific needs.
1. Appearance
1.1 EP Cube HES
EP Cube HES is an integrated energy storage product that includes both EP Cube PCS and
Battery Modules. The number of integrated battery modules can vary between a minimum
of 2 modules to a maximum of 6 modules connected in series with EP Cube PCS. (Refer to
EU Specification for more details)
Reference Model:
EP Cube PCS + 4x Battery Modules
PRODUCT DESCRIPTION
Wi-Fi Module
Power Button AC Outlet
Communication Outlet
PV Connectors
Battery Back Bracket
Base Bracket
Base
Battery Module
EP Cube PCS Wall Bracket
WIFI/BT Outlet

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Power Button
Status LEDs
Heat Sink
Wi-Fi Module
AC Outlet
PV Outlet
Communication Outlet
Front Cover
A. EP Cube PCS
WIFI/BT Outlet

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Top Cover Mating Connector
C. EP Cube Base
B. EP Cube Battery Module
Locating Pin
Handle
Screw Hole
Mating Connector
Vent
Top Cover Mating Connector
Locating Pin ScrewHole
Mating Connector
Base Bracket

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AC Switch Box
D. EP Cube AC Switch Box(optional)

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2. Operation Modes
The EP Cube has 3 different operation modes designed to accommodate a wide range of energy
preferences and different needs .
2.1. Self-Consumption Mode
During this mode power generated by PV is utilized to supply power to connected loads as a priority.
Any surplus power is then used to charge the battery modules. Only once battery modules are fully
charged, power is exported to grid.
In self-consumption mode, the user can set the lowest threshold for the Reserve SOC(state of
charge) value in order to save some energy for emergency use only.
PV Power Usage Priority: Load > Battery > Grid.
Load Energy Source Priority: PV > Battery > Grid
Battery Charging Source: PV only
2.2. Backup Mode
During this mode, energy stored by the battery modules is reserved for backup only, and batteries
only get discharged in case of grid blackout or other power failures.
This mode also offers the user to set a threshold value for Reserve SOC in order to use stored
energy for emergency/backup use only.
PV Power Usage Priority: Battery > Load > Grid
Load Energy Source Priority: Grid > PV > Battery
Battery Charging Source: PV > Grid

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2.3. Time of Use Mode
This mode offers time-based control for best cost efficiency if the electricity cost varies throughout
the day. TOU mode offers mainly 3 features to configure EP Cube to meet diverse power needs under
different scenarios.
a. Allows to input TOU time window.
b. It allows to choose whether to charge the batteries via grid or not during off-peak hours.
c. Allows to enable/disable Daylight Saving Time (DST) if TOU time window changes due to DST.
During peak hours:
PV Power Usage Priority: Load > Battery > Grid.
Load Energy Source Priority: PV > Battery > Grid
Battery Charging Source: PV only
During off-peak hours:
Load Energy Source Priority: PV > Grid
Battery Charging Source: PV > Grid