SUNSYNK L5.1 Energy Storage System User Manual

SUNSYNK L5.1 Energy Storage System

INTRODUCTION

Thank you for choosing Sunsynk’s energy storage system.

SUNSYNK-L5.1 lithium iron phosphate battery is one of the new energy storage products developed and produced by SUNSYNK. SUNSYNK-L5.1 is especially suitable for application scenarios of high power, limited installation space, and long cycle life. It can be used to support reliable power for various types of equipment and systems.
The energy storage module includes lithium-ion rechargeable batteries with 5.12kWh capacity, and the controller enables a central of multiple modules. Thus, batteries can be connected in parallel to expand capacity and power for applications that require larger capacity and longer power support.
SUNSYNK-L5.1 has a built-in BMS (battery management system), which can manage and monitor cell battery information, including voltage, current, and temperature. Moreover, the BMS can balance cells charging and discharging to extend cycle life.
This manual provides information regarding safety precautions to prevent possible accidents and how to use the product. Please read this manual carefully before use for safety and keep this manual handy for reference.
Some main features of this product are:

• The whole module is non-toxic, non-polluting, and environmentally friendly.
• The cathode material is made from LiFePO4 with safety performance and long cycle life.
• Battery management system (BMS) has protection functions, including over-discharge, over-charge, over-current, and high/low temperature.
• The system can automatically manage the charge and discharge state and balance the current and voltage of each cell.
• Flexible configuration, multiple battery modules can be connected in parallel for expanding capacity and power.
• Adopted self-cooling mode rapidly reduced entire system noise.
• The module has less self-discharge, up to 6 months without charging it on the shelf, no memory effect, and excellent shallow charge and discharge performance.
• Battery module communication address auto networking, easy maintenance, and support monitoring and upgrading the firmware remotely.
• High-power density: flat design, wall-mounted, and 19-inch rack-mount, saving installation space.

BATTERY EXPANSION AND USE

• The production date of the original batteries and newly added batteries should be as close as possible, within one year is best. If the time differences of production are too long, the battery capacity deviation will be large, and the batteries’ energy cannot be fully utilised.

• Before expansion, please fully charge the original batteries to 100% (keep SOC 100%), and then charge the batteries that need to be added to SOC 100%. Next, assemble to achieve the purpose of expansion.
  The original batteries can be charged using an inverter; The newly added batteries need to be charged separately with the battery charger.

• Please consult relevant technical personnel before expansion. The individual will bear all consequences caused by personal misoperation, not covered by the Sunsynk warranty.

• Sunsynk lithium battery is prohibited to work in Lead-acid Mode. Any failure caused by using a Lead-acid model is not covered by the Sunsynk warranty.

SAFETY

Sunsynk’s products are designed with full consideration for safety. However, all electrical appliances can be dangerous if used inappropriately. They can cause a fire or electric shock, leading to severe injury or death. For your protection, please read these safety precautions thoroughly.

General Safety

• It is crucial and necessary to read the user manual carefully (in the accessories) before installing or using the SUNSYNK-L5.1 battery. Failure to do so or to follow any of the instructions or warnings in this document can result in electrical shock, serious injury, death, or damage to the battery, potentially rendering it inoperable.
• It is required to charge the battery every six months, and the SOC should be no less than 50% in case it is stored for a long time.
• The battery needs to be recharged within 48 hours after being fully discharged.
• Do not expose the cable outside.
• All the battery terminals must be disconnected before starting the maintenance.
• Please, contact the supplier within 24 hours if something abnormal happens.
• Do not use cleaning solvents to clean the battery.
• Do not expose the battery to flammable or harsh chemicals or vapours.
• Do not paint any part of the battery, including any internal or external components.
• Do not connect the battery with PV solar panel wiring directly.
• The warranty claims are excluded for direct or indirect damage due to the items above.
• Any foreign object is prohibited from inserting into any part of the battery.

Symbols/Safety Signs

This symbol indicates information that if ignored, could result in personal injury, physical damage or even death due to incorrect handling.|

---|---
Electrical Hazard|
Danger.|
The Battery is heavy and can cause injury if not handled safely|
Do not submerge the battery in water or expose it to moisture or liquid.|
Do not drop, deform, or impact the battery.|
This product’s batteries contain an explosive, self-reactive material that could blow up when heated.|
Read the manual|
Indicates that this product is recyclable.|
Do not place near open fire or incinerate. Do not use near heaters or hot temperature sources|
Do not disassemble or alter the battery in any way. Do not strike or puncture the battery.|
Do not step or put any objects onto the battery|
Keep out of reach of children, animals, and insects.|
Rechargeable.|
Direct Current.|
Follow the indicated temperatures.|
Contact the supplier within 24 hours if there is anything wrong. In case of leakage contact with eyes or skin, immediately clean with water and seek help from a doctor.|
The UKCA marking is used for products placed on the market in Great Britain (England, Scotland and Wales). The UKCA marking applies to most products for which the CE marking could be used.|
Li-ion Battery.|
Charging and Discharging|
Product exposure.|
BATTERY INPUT Battery Discharge Voltage, Battery Discharge Current, Input Voltage Type, Battery Discharge Power.|
Do not dispose the device, accessories, and packaging with regular waste. Follow local ordinances or contact the manufacturer for disposal guidance.|
CE mark is attached to the solar inverter to verify that the unit follows the provisions of the European Low Voltage and EMC Directives.|

Procedures and Precautions Before Connecting

• After unpacking, please, first check the product and packing list. Please, get in touch with the local retailer if some product is damaged or lacks parts.
• Before installation, cut off the grid power and ensure the battery is in the turned-off mode.
• Wiring must be correct, do not mistake the positive and negative cables, and ensure there is no short circuit with the external device.
• It is prohibited to connect the battery and AC power directly.
• The battery system must be well grounded, and the resistance must be less than 1Ω.
• Please ensure the electrical parameters of the battery system are compatible with related equipment.
• Keep the battery away from water and fire.

Safety Precautions While Using

• Cut off the power and completely shut down the battery before moving or repairing the battery.
• Connecting the SUNSYNK-L5.1 battery with a different type of battery is prohibited.
• It is forbidden to put the batteries working with faulty or incompatible inverters.
• It is not permitted to disassemble the battery.
• Liquid fire extinguishers are forbidden. In case of fire, only dry fire extinguishers can be used.
• Please do not open, repair, or disassemble the battery except staff from SUNSYNK or authorized by SUNSYNK. We do not undertake any consequences or related responsibility because of violation of safety operation or violation of design, production, and equipment safety standards.

Handling

• The battery should only be used as instructed.
• DO NOT use the battery if it seems broken or damaged.
• The battery is non-user-serviceable and should not be opened for repair.
• Handle the battery with care when installing or transporting it.
• Chemicals should not be used to clean the battery

Damaged Battery

A damaged battery should not be used and should be returned to Sunsynk or properly discarded via a recycling facility. Leaking electrolytes can cause skin irruption and chemical burns, so contact should be avoided.

Eye| Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
---|---
Skin| Remove contaminated clothes and rinse skin with plenty of water or shower for 15 minutes. Get medical aid.
Inhalation| Remove from exposure and move to fresh air immediately. Use oxygen if available
Ingestion| Give at least two glasses of milk or water. Induce vomiting unless the patient is unconscious. Call a physician.

SPECIFICATIONS AND FUNCTIONS

Dimensions and Weigh

SUNSYNK-L5.1 dimensions are presented below:

SUNSYNK – L5.1

Depth| 135mm
Width| 440mm
Height| 620mm
Weight (Approx.)| 50kg

Basic System Architecture

The following illustration shows the basic application of the SUNSYNK-L5.1 battery.

Contact our customer service or an accredited seller for precise information about application cases of the SUNSYNK-L5.1 battery.

TECHNICAL DATA

Other Parameter
Recommend Depth of Discharge| 90%
Dimension (W/H/D)| 440620135mm (don’t include Circuit Breaker, terminals and hanging boards)
Weight Approximate| 50kg
Master LED Indicator| 5 LED (SOC 20%~100%)
3 LED (working, alarming, protecting)
IP Rating of enclosure| IP65
Working Temperature| Charge: 0ºC ~ +55ºC
( optional heating: -20ºC~+55ºC)
Discharge: -20ºC ~ +55ºC
Storage Temperature| -20ºC ~ +35ºC
Humidity| 5% ~ 95%
Altitude| ≤2000m
Installation| Wall Mounted or 19-inch standard cabinet
Communication Port| CAN2.0, RS485
Certification| IEC62619, CE, UN38.3

1. DC Usable Energy, test conditions: 90% DOD, 0.5C charge & discharge at 25°C. System usable energy may vary due to system configuration parameters.
2. The current is affected by temperature and SOC.

EQUIPMENT INTERFACE INSTRUCTION

This section details the front and side panel of the interface functions. Following, you will find the SUNSYNK-L5.1 front side illustration.

1. RUN Light
2. Alarm & Error Light
3. SOC Light
4. Pressure Release Valve
5. Power Switch
6. PCS
7. Parallel Communication Port IN
8. Parallel Communication Port OUT
9. Grounding Bolt
10. Battery Positive +
11. Battery Negative –
    

Power Switch

| | Power Switch to turn ON/OFF the whole battery BMS standby, no power out- put.
RUN| | RUN LED: 1 green LED lighting to show the battery running status, long lighting when charging and flash when discharging
Alarm| | Alarm LED: 1 yellow LED lighting to show the battery has an alarm. It flashes in alarm conditions and flashes long lighting if the equipment fails.
Alarm| | Error LED: 1 red LED lighting to show the battery is under protection.
Alarm| | SOC LED: 5 green LEDs to show the battery’s current capacity. Each light rep- resents 20% of the capacity.
PCS| | Inverter communication terminal: (RJ45 port) follow the CAN protocol (baud rate: 500K), used to output battery information to the inverter.
IN| | Parallel Communication Terminal: (RJ45 port) Connect “out”.
The terminal of the Previous battery for communication between multiple parallel batteries.
OUT| | Parallel Communication Terminal: (RJ45 port) Connect “IN”. The terminal of the Next battery for communication between multiple parallel batteries.
Grounding Bolt| | Used for the battery connecting to the PE.
Condition| RUN| ALM| Error| SOC1| SOC 2| SOC 3| SOC 4| SOC 5
---|---|---|---|---|---|---|---|---
Power off| Off
Charge|

Blink

|

Blink if Alarm Exists

| Off|

Show SOC & highest LED blink

Discharge or Idle| Off|

Show SOC & long bright

Alarm|

Blink

| Off|

Other LEDs are same as above.

System error/ Protect|

Upgrade| Blink Fast
Critical Error| Blink Slow

The following table presents the definition for PCS, IN, and OUT connection pins. All use the same pin number sequence shown in the next image:

Pin No.| PCS Port Definition| IN Port Definition| OUT Port Definition
---|---|---|---
1| 485-B| CANL| CANL
2| 485-A| CANH| CANH
3| —| DI+| DO+
4| CANH| DI-| DO-
5| CANH| DI-| DO-
6| —| DI+| DO+
7| 485-A| CANH| CANH
8| 485-B| CANL| CANL
Protection and Alarm| Management and Monitor
---|---
Charge/Discharge End| Intelligent Protect Mode
Charge Over Voltage| Intelligent Charge Mode
Discharge Under Voltage| Protect, Charge Current Limit
Charge/Discharge Over Current| Intelligent Protect Mode
High/Low Temperature(cell/BMS)| Intelligent Protect Mode
Short Circuit| Protect

INSTALLATION

Parts List

Check if you received all the items listed below. Ensure that nothing is damaged in the package.

• Battery Pack x1

• Communication Line x1

• Ground Wires x1

• Hanging Board x1

• Stainless Steel Anti-Collision Bolt M6x100 x4

• Hanging Board Mounting Screws M6*10 x8

• Stainless Steel Mounting  Screws M6*16×4 Flange Nuts M6x4

• User Manual x1

Installation Precaution

The location of the battery should follow the operating temperature range and IP rating specified in the Specification section of this manual. The SUNSYNK-L5.1 is designed for outdoor use (IP65). But please avoid direct sunlight, rain exposure, and snow laying up during installation and operation. Although the batteries run at a low temperature, proper airflow around the batteries is recommended.

When installing the set, the following conditions should be met:

• DO NOT install the product in a completely closed area with no air-conditioning. It can overheat and cause a fire.
• DO NOT place in direct sunlight or near a source of heat. This can cause deformation, a breakdown, or a fire. Pay extra attention when you place the system near windows.
• The battery must not be set where excessive oil, smoke, steam, moisture or dust is contained in the air.
• Ensure that the batteries are installed in a clean environment with minimal dust.
• Avoid installing the set near the ocean. If unavoidable, appropriate air filtration should be used to prevent salt air from in contact with the batteries.
• For proper air circulation to dissipate heat, allow a clearance of approximately 30 cm to the sides of the battery.
• DO NOT install the set near heat sources.
• DO NOT install the SUNSYNK-L5.1 in areas where highly flammable materials are stored.
• DO NOT install the SUNSYNK-L5.1 in potentially explosive areas.
• DO NOT install the SUNSYNK-L5.1 in the cool air directly.
• DO NOT install higher than an altitude of about 2000 meters above sea level.
• DO NOT install the SUNSYNK-L5.1 in an environment of precipitation or humidity (>95%).

Selecting the Mounting Area

Make sure that the installation location meets the following conditions:

• The area is entirely waterproof.
• The wall is flat and level.
• There are no flammable or explosive materials.
• The ambient temperature is within the range of -20°C to 50°C.
• The temperature and humidity are maintained at a constant level.
• There is minimal dust and dirt in the area.
• The distance from any heat sources is more than 2 meters.
• The distance from the air outlet of the inverter is more than 0.5 meters.
• Do not cover or wrap the battery case or cabinet.
• Do not place the SUNSYNK-L5.1 in the children’s or pet’s reach area.
• The installation area shall avoid direct sunlight.
• The battery module has no mandatory ventilation requirements, but please avoid installation in confined areas. The aeration shall avoid high salinity, humidity, or temperature.

WARNING

If the ambient temperature is outside the operating range, the battery pack stops operating to protect itself. The optimal temperature range for the battery pack is between 15°C and 35°C.
Frequent exposure to harsh temperatures may deteriorate the performance and life of the battery pack.

Tools and Safety Gears Necessary

The following tools are required to install the battery:

• Torque Screwdriver

• Phillips Screwdriver

• Hexagon Wrench

• Phillips Screwdriver

• Slotted Screwdriver

• Torque Wrench

• Tape Measure

• Driller

• Pencil or Marker

WARNING

Use adequately insulated tools to prevent accidents tale electric shocks or short circuits.
If insulated tools are not available, cover the entire exposed metal surfaces of the available tools, except their tips, with electrical tape.

We recommend wearing the following safety gear when dealing with the battery pack installation or maintenance.

• Safety Gloves

• Safety Goggles

• Safety Shoes

Mounting the Battery

Fix the wall-mounted battery on the wall-mounted battery after fixing the hanging plate to the wall with stainless steel anti-collision bolts.

WARNING

Risk of injury (Heavy Object).

Remember that this storage system is heavy (50kg – Approximate), so users must carefully handle the unit during installation, especially when mounting or removing it from the wall.

Installation

To install the SUNSYNK-L5.1 battery, follow the steps:

• Install the SUNSYNK-L5.1 battery on the wall, as shown in the previous section.

• Connect the communication cable to the inverter. The first battery communication cable should connect to the inverter for parallel installation. In contrast, the second battery should connect to the first one.
  The same pattern should be used if more batteries are installed in parallel.

• Connect the power cables from the battery to the inverter terminals. IMPORTANT, the battery DC+ terminal should connect to the inverter DC+ terminal, and the battery DC- terminal should connect to the inverter DC- terminal. If a second battery is installed in parallel, its DC+ and DC- terminals should connect to the first battery’s DC+ and DC- terminals. The same pattern should be used if more batteries are installed in parallel.

• Turn on all battery power in turn.

The following image illustrates how to connect batteries to the inverter in parallel.

Connection Inspection
After installing and connecting the battery, check the following points:

• Usage of positive and negative cables.
• Connection of the positive and negative terminals.
• All the bolts are tightened.
• Cables fixation and appearance.
• The setting of the dialling address.
• The installation of the protecting cover.

Starting the SUNSYNK-L5.1 Battery

After completing installation, wiring, configuration, and checking all the connections, you can start the battery.
Press the power button to activate the battery when the connections are correct. If the green working light on the front panel flashes, the battery system will be operating correctly.

Symbol Explanation

Many symbols are present with the battery product and used materials to install it. Next, a list of symbols and their meanings is presented.

DANGER/HIGH VOLTAGE INSIDE

| CAUTION:

• Do not disassemble or alter the battery in any way.
• Do not use the battery for purposes not described in its documentation.
• Do not drop, strike, puncture, or step on the battery.
• In case of electeolyte leakage, keep leaked electrolyte away from contact with eyes or skin, immediately clean with water and seek help from a doctor.
• Do not put the battery into a fire. Do not use it or leave it in a place near fire, heaters, or high temperature sources.
• Do not submerge the battery in water, or expose it to moisture.
• Do not allow the terminals to contact exposed wire or metal.
• The battery is heavy and can cause injury if not handled safely.
• Keep out of reach of children or animals.

INSPECTION, CLEANING AND MAINTENANCE

General Information

• The SUNSYNK-L3.0 battery is not fully charged when shipped. We recommend installing within three\ months after arrival;

• During the maintenance process, do not re-install the batteries in the SUNSYNK-L3.0. Otherwise, the performance of the product will be reduced;

• It is forbidden to dismantle any battery in the SUNSYNK-L3.0, and it is not permitted to dissect the battery;

• After the SUNSYNK-L3.0 battery is over-discharged, we recommend charging the battery within 48 hours.
  The SUNSYNK-L3.0 can also be charged in parallel. After connecting the batteries in parallel, the charger needs to connect to the output port of any SUNSYNK-L3.0.

• Never attempt to open or dismantle the battery! The inside of the battery does not contain serviceable parts.

• Disconnect the SUNSYNK-L3.0 Li-Ion battery from all loads and charging devices before performing cleaning and maintenance activities

• Place the enclosed protective caps over the terminals before cleaning and maintenance activities to avoid the risk of contacting the terminals.

Inspection

Inspect for loose and/or damaged wiring and contacts, cracks, deformations, leakage, or damage of any other kind. If you find any damage to the battery, it must be replaced.

• Do not attempt to charge or use damaged batteries.
• IMPORTANT: Do not touch the liquid from a ruptured battery.

Regularly check the battery’s state of charge. Lithium Iron Phosphate batteries will slowly self-discharge when not in use or whilst in storage. Consider replacing the battery with a new one if you note either of the following conditions:

• The battery run time drops below 70% of the original run time.
• The battery charge time increases significantly.

Cleaning

If necessary, clean the Li-Ion battery with a soft, dry cloth. Never use liquids, solvents, or abrasives to clean the Li-Ion battery.

Maintenance

The Li-Ion battery is maintenance-free. Charge the battery to approximately > 80% of its capacity at least once every year to preserve the battery’s capacity.

Storage

The battery product should be stored in a dry and cool environment;

• Generally, the maximum storage period at room temperature is six months. When the battery is stored for over six months, we recommend checking the battery voltage. If the voltage exceeds 51.2V, you can continue storing the battery. In addition, you should check the voltage at least once a month until the voltage is lower than 51.2V. When the battery’s voltage is lower than 51.2V, it must be charged according to the charging strategy.
• The charging strategy is as follows: discharge the battery to the cut-off voltage with 0.2C (20A) current, then charge with 0.2C (20A) current for about 3 hours. Keep the SOC of the battery at 40%-60% when stored.
• When the battery is stored, it should be kept away from explosive and flammable areas, and ignition or high-temperature sources should be kept distant from the battery

TROUBLESHOOTING

To determine the status of the battery system, users must use additional battery status monitoring software to examine the protection mode. Refer to the installation manual about using the monitoring software. Once the user knows the protection mode, refer to the following table for solutions and additional information.

Fault Type| Fault Generation

Condition

| Possible Causes| Troubleshooting
---|---|---|---
BMS fault| The cell voltage sampling circuit is faulty.
The cell temperature sampling circuit is faulty| The welding point for cell voltage sampling is loose or disconnected.
The voltage sampling terminal is disconnected.
The fuse in the voltage sampling circuit is blown.
The cell temperature sensor has failed.| Replace the battery.
Electrochemical cell fault| The voltage of the cell is low or unbalanced.| Due to large self-discharge, the cell over-discharges to below 2.0V after long- term storage.
External factors damage the cell, and short circuits, pinpricks, or crushing occurs.| Replace the battery.
Over-voltage protection| The cell voltage is greater than 3.65 V in the charging state.

The battery voltage is greater than 58.4 V.

| The bus-bar input voltage exceeds the standard value.
Cells are not consistent. The capacity of some cells deteriorates too fast, or the internal resistance of some cells is too high.| Contact local engineers to rectify the fault if the battery cannot be recovered due to protection against abnormality.
Under voltage protection| The battery voltage is less than 40V.
The minimum cell voltage is less than 2.5V| The mains power failure has lasted for a long time.
Cells are not consistent. The capacity of some cells deteriorates too fast, or the internal resistance of some cells is too high.| Contact local engineers to rectify the fault if the battery cannot be recovered due to protection against abnormality.
Charge or discharge high-temperature protection| The maximum cell temperature is greater than 60oC| The battery ambient temperature is too high.
There are abnormal heat sources around.| Contact local engineers to rectify the fault if the battery cannot be recovered due to protection against abnormality.
Charge low temperature protection| The minimum cell temperature is less than 0oC| The battery ambient temperature is too low.| Contact local engineers to rectify the fault if the battery cannot be recovered due to protection against abnormality.
Discharge low temperature protection| The minimum cell temperature is less than -20oC| The battery ambient temperature is too low.| Contact local engineers to rectify the fault if the battery cannot be recovered due to protection against abnormality.

After checking the above data, please send it to our personnel service. Thus, we will evaluate your problem and reply with the best solution.

BATTERY RECOVERY

Aluminium, copper, lithium, iron, and other metal materials are recovered from discarded LiFePO4 batteries by the advanced hydro-metallurgical process. The process can reach a recovery efficiency of up to 80%. Next, the process steps are presented

Recovery Process and Steps of Cathode Materials

Aluminium foil as a collector is amphoteric metal. Firstly, it is dissolved in NaOH alkali solution to make aluminium enter the solution in the form of NaAlO2. After filtration, the filtrate is neutralized with sulphuric acid solution and precipitated to obtain Al (OH)3. When the pH value is above 9.0, most of the aluminium precipitates and the obtained Al (OH)3 can reach chemical purity after analysis.
The filter residue is dissolved with sulphuric acid and hydrogen peroxide. Thus, lithium iron phosphate enters the solution in the form of Fe2 (SO4) 3 and Li2SO4, separated from carbon black and carbon coated on the surface of lithium iron phosphate. After filtration and separation, the pH value of the filtrate is adjusted with NaOH and ammonia water. First, iron is precipitated with Fe (OH) 3, and the remaining solution is precipitated with saturated Na2CO3 solution at 90ºC.
Since FePO4 is slightly dissolved in nitric acid, the filter residue is dissolved with nitric acid and hydrogen peroxide, which directly precipitates FePO4, separates impurities such as carbon black from the acid solution, leaches Fe (OH) 3 from filter residue respectively, and precipitates Li2CO3 with saturated Na2CO3 solution at 90ºC.

Recovery of Anode Materials

The recovery process of anode materials is relatively simple. After the anode plates’ separation, copper’s purity can be more than 99%, which can be used to further refine electrolytic copper.

Recovery of Diaphragm

The diaphragm material is mainly harmless and has no recycling value.

List of Recycling Equipment

Automatic dismantling machine, pulverize, wet gold pool, etc.

TRANSPORTATION REQUIREMENTS

Transport the battery products just after packaging. It can be transported using cars, trains, and ships. Avoid exposing the packaging to severe vibration, impact, or extrusion during transportation. Also, avoid exposing the packaging to direct sunlight or rain.
Always check all applicable local, national, and international regulations before transporting Lithium Iron Phosphate batteries.
In some instances, transporting end-of-life, damaged, or recalled batteries may be especially limited or prohibited.
The transport of the Li-Ion batteries falls under hazard class UN3480, class 9. The battery falls within packaging group PI965 Section I for transport over water, air, or land.
Use Class 9 Miscellaneous Dangerous Goods and UN Identification labels for transportation of lithium-ion batteries, which are assigned Class 9. Refer to relevant transportation documents.
The Class 9 Miscellaneous Dangerous Goods and UN Identification Label is presented next:

CUSTOMER SUPPORT

CONTACT US
Email us: [email protected]
Call us UK: +44 151 8324300
VAT Number: 175669460
UK Address:
Sunsynk, 17 Turnstone business park, Mulberry Avenue. Widnes, Cheshire, WA8 OWN.
Room 702-704, 7/F Texwood Plaza, 6 How Ming Street, Kwun Tong, Kowloon, Hong Kong
Tel: +852 2884 4318
Fax: +8522884 4816
www.sunsynk.com /
[email protected]

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