Deye BOS-G Lithium Storage System Instruction Manual

Installation and Operation Instructions
LITHIUM STORAGE SYSTEM
BOS-G Version: V1.3

Important information in the manual

1.1 Scope
The installation and operation manual applies to the modular battery energy storage system.
Please carefully read this installation and operation manual to ensure the safe installation, preliminary debugging, and maintenance of BOS-G. Installation, preliminary debugging, and maintenance must be carried out by qualified and authorized personnel. Please keep this installation and operation manual and other applicable documents near the battery energy storage system, so that all personnel involved in installation or maintenance can access this installation and operation manual at any time.

This installation and operation manual only applies to countries meeting the certification requirements. Please observe the applicable local laws, regulations, and standards. Standards and legal provisions of other countries may be inconsistent with the provisions and specifications in this manual. In this case, please contact our after-sales service personnel, hotline: +86 0574 8612 0560, email: service-ess@deye.com.cn.

1.2 Description of BOS-G

1.3 Meaning of Symbols
This manual contains the following types of warnings:

Danger! It may cause an electric shock.
Even when the equipment is disconnected from the power grid, the voltage-free state will have a time lag.
Danger! If the instructions are not observed, death or severe injury may occur.
Warning! If the instructions are not observed, a loss may occur.
Attention! This symbol represents information on the device use.

Symbols on equipment:
The following types of warning, prohibition, and mandatory symbols are also used on the equipment.

Attention! The risk of chemical burns
If the battery is damaged or fails, it may lead to electrolyte leakage, which in turn causes the formation of a small amount of hydrofluoric acid, among other effects. Contact with these liquids can cause chemical burns.

• Do not subject the battery module to severe impact.
• Do not open, disassemble or mechanically change the battery module.
• In case of contact with an electrolyte, wash the affected area with clean water immediately and seek medical advice promptly.

Attention! The risk of explosion
Incorrect operation or fire may cause the lithium-ion battery unit to ignite or explode, leading to serious injury.

• Do not install or operate the battery module in explosive or high-humidity areas.
• Store the battery module in a dry place within the temperature range specified in the data sheet.
• Do not open, drill through or drop the battery cell or module.
• Do not expose the battery cell or module to high temperatures.
• Do not throw the battery cell or module into the fire.
• If there is a fire from the battery, please use the CO2 extinguisher. If there is a fire near the battery, please use a dry powder extinguisher.
• Do not use defective or damaged battery modules.

Caution! Hot surface

• If a malfunction occurs, the parts will become very hot, and touching them may cause serious injury.
• If the energy storage system is defective, please shut it down immediately.
• If the fault or defect becomes obvious, special care should be taken when handling the equipment.

No open fire! It is prohibited to handle open flames and ignition sources near the energy storage system.
Do not insert any objects into the opening in the housing of the energy storage system!
No objects, such as screwdrivers, may be inserted through openings in the casing of the storage system.
Wear safety goggles! Wear safety goggles when working on the equipment.
Follow the manual! When working and operating the equipment, the installation and operation manual provisions must be observed.

1.4 General Safety Information
**Danger!** Failure to comply with the safety information can lead to life- threatening situations.

1. Improper use can cause death. Operators of BOS-G must read this manual and observe all safety information.
2. Operators of BOS-G must comply with the specifications in this manual.
3. This manual cannot describe all conceivable situations. For this reason, applicable standards and relevant occupational health and safety regulations are always given priority.
4. In addition, the installation may involve residual hazards in the following circumstances:
   • Incorrect installation.
   • The installation is carried out by personnel who did not receive relevant training or guidance.
   • Failure to observe the warnings and safety information in this manual.

If there are any questions, please contact Deye after service.

1.5 Disclaimer
DEYE ESS TECHNOLOGY CO., LTD shall not be liable for personal injury, property loss, product damage and subsequent losses under the following circumstances.

• Failure to comply with the provisions of this manual.
• Incorrect use of this product.
• Unauthorized or unqualified personnel repair the product, disassembly the rack and perform other operations.
• Use of unapproved spare parts.
• Unauthorized modifications or technical changes to the product.

1.6 Proper Use

• The battery energy storage system can only be installed and operated in an enclosed space. The working environment temperature range of BOS-G is -20℃~ 55℃, and the maximum humidity is 85%. The battery module shall not be exposed to the sun or placed directly beside the heat source.
• The battery module shall not be exposed to a corrosive environment.
• When installing the battery energy storage system, ensure that it stands on a sufficiently dry and flat surface with sufficient bearing capacity. Without the manufacturer’s written approval, the installation site’s altitude shall not be higher than 2,000 meters. The output power of the battery decreases with the altitude.
• In areas where flooding may occur, care must be taken to ensure that the battery module is installed at a suitable height and to prevent its contact with water.
• The battery energy storage system must be installed in a fireproof room. This room must have no fire source and must be equipped with an independent fire alarm device, which complies with local applicable regulations and standards. According to local applicable regulations and standards, the room must be separated by the T60 fire door. Similar fire-proof requirements apply to other openings in the room (such as windows).

Compliance with the specifications in this manual is also part of proper use.

The use of the BOS-G system is prohibited in the following circumstances:

• Mobile use on land or in the air (use on water only with the manufacturer’s consent and with the manufacturer’s written consent).
• Used in medical devices.
• Used as a UPS system.

1.7 Quality Certificate
The quality certificate can be downloaded from www.deyeess.com.

1.8 Requirements for Installation Personnel
All work shall comply with local applicable regulations and standards.
The installation of BOS-G can only be completed by electricians with the following qualifications:

• Trained in dealing with hazards and risks associated with the installation and operation of electrical equipment, systems, and batteries.
• Trained on installation and debugging of electrical equipment.
• Understanding and complying with the technical connection conditions, standards, guidelines, regulations, and laws applicable.
• Knowledge of handling lithium-ion batteries (transportation, storage, disposal, hazard source).
• Understanding and complying with this document and other applicable documents.
• Installation video of BOS-G can be found at www.deyeess.com or contact us via email: service-ess@deye.com.cn.

Safety

2.1 Safety rules
To avoid property damage and personal injury, the following rules shall be followed when working on the hazardous live parts of the battery energy storage system:

• It is available for use.
• Ensure that it will not restart.
• Make sure there is no voltage.
• Grounding protection and short circuit protection
• Cover or shield adjacent live parts.

2.2 Safety information
Part damage or short circuit may cause electric shock and death. A short circuit can be caused by connecting battery terminals, resulting in current flow. This type of short circuit shall be avoided under any circumstances. For this reason, follow these instructions:

• Use insulated tools and gloves.
• Do not put any tools or metal parts on the battery module or high-voltage control box.
• When operating the battery, be sure to remove watches, rings, and other metal objects.
• Do not install or operate this system in explosive or high-humidity areas.
• When working on the energy storage system, first turn off the charging controller, then the battery, and ensure that they are not turned on again.

Improper use of the battery energy storage system can lead to death. The use of the battery energy storage system beyond its intended use is not allowed, because it may cause great danger.
Improper handling of the battery energy storage system can cause life- threatening risks, serious injury or even death.

Warning! Improper use can cause damage to the battery cell.

• Do not expose the battery module to rain or soak it in liquid.
• Do not expose the battery module to a corrosive environment (such as ammonia and salt).
• The battery energy storage system shall be debugged no later than six months after delivery.

Transport to the end customers

3.1 Provisions on Shipping of Battery Modules:
It is necessary to comply with the relevant regulations and provisions on roads for shipping lithium-ion products in the corresponding countries.

It is prohibited to smoke in the vehicle during transportation or in the vicinity during loading and unloading.
The dangerous goods transport vehicles shall meet relevant regulations concerning road transportation and shall be equipped with two tested CO2 fire extinguishers.
It is forbidden for the freight forwarder to open the outer package of the battery module.
Use only approved lifting equipment to move the battery cabinet system. Use only the hanging lug on the top of the battery cabinet as the connection point. When lifting, the angle of the sling must be at least 60°.
Improper vehicle transportation can cause injury. Improper transportation or improper transportation locks may cause the load to slip or overturn, resulting in injury. The cabinet shall be placed vertically to prevent it from sliding in the vehicle, and a fixing belt shall be used.
A tilting of the battery rack may cause injury. The maximum weight of a single battery rack of BOS-G can reach 628 kg. When tilted, they may overturn, causing injury and damage.
Ensure that the battery cabinet is on a stable surface and that it does not tilt due to load or force.
The battery energy storage system can be damaged, if not properly transported. The battery module can only be transported vertically. Note that these parts may be top-heavy. Failure to follow this instruction may result in damage to the part.
During transportation, the battery storage rack may be damaged when it is installed with the battery module. The battery storage rack is not designed to be transported with the installed battery modules. Always transport the battery module and the battery rack separately. Once the battery module is installed, do not move the battery rack, and do not lift it by a lifting device.
If possible, do not remove the transport packaging before arrival at the installation site. Before removing the transport protector, check if the transport packaging is damaged, and check the impact indicator on the outer packaging of the battery converter. If the impact indicator is triggered, the possibility of transport damage cannot be ruled out.
Improper transportation of battery modules may cause injury. The single battery module weighs 44 kg. If it falls or slips, it may cause injury. Only use suitable transport and lifting equipment to ensure safe transport.
Wear safety shoes to avoid the danger of injury. When transporting the battery rack and battery module, their parts may be crushed due to their heavy weight. Therefore, all persons involved in transportation must wear safety shoes with toe caps. Please observe the safety regulations for transportation at the end customer’s site, especially during loading and unloading.
During transportation and installation of unpacked battery storage cabinets, the risk of injury increases, especially on sharp metal panels. Therefore, all personnel involved in transportation and installation must wear protective gloves.
The maximum weight of a single rack of BOS-G can reach 628 kg. We suggest that at least 2-3 people work together to install the battery rack. The lifting device is helpful for heavy parts, and the pulley or cart for light parts. Be careful not to damage the case. The number of battery modules stacked shall not be more than 8.

Check whether the delivery is complete.

3.2 Permissible and Impermissible Storage Positions of a Packaged
Battery Module
The battery module can only be transported in an upright position. Please note that the battery rack may be very top-heavy.

Preparation

4.1 Tools required

beam and the cross beam.
• Install and connect the side beam/cross beam.
• Fix the L-shaped bracket to the side beam.
• Fix the base assembly to the side beam.
• Fix the diagonal brace to the beams on both sides.
• Fix the base to the side or cross beam.
• Install the ground wire.
• Install the hanging lug on the battery module/high-voltage control box.
• Fix the battery module and the high-voltage control box on the rack.
10mm hexagon socket| • Fix the expansion screw
24mm wrench| • Adjust the height of the base and tighten the nut.

4.2 Auxiliary Tools and Materials Required

1. Assemble the battery racks and fix them on the wall or connect the two racks.
2. Assemble  the  battery  modules  and high-voltage control boxes, and fix them to the racks.

Description and installation of BOS-G battery

5.1 Installation Precautions
WARNING! Possible damage to the building due to static overload

1. The total weight of the battery storage system is 628kgs. Ensure that the installation site has sufficient bearing capacity.
2. When selecting the installation site, consider the transportation route and necessary site cleanup.

5.2 BOS-G Product Description

BOS-G is a high-voltage lithium-ion battery system. It provides a reliable backup power supply for supermarkets, banks, schools, farms and small factories to smooth the load curve and achieve peak load transfer. It can also improve the stability of renewable systems and promote the application of renewable energy.
It is characterized by high integration, good reliability, long service life, wide working temperature range, etc. The battery energy storage system is modular. Each battery module has a capacity of 5.12 kWh. It can support up to 12 battery modules in series. Its total energy can be expanded from 15.36 kWh to 61.44 kWh.

5.3 Technical Data

5.4 Description of Rack
5.4.1 3U-HRack Parts description

5.4.2 Installation of Rack

1. Take out two side beams and upper and lower crossbeams to form a rectangular frame, connect with side beams and crossbeams using big tripods and small tripods, and then fix big and small triangular supports with side beams and crossbeams using M6*12 outer hexagon cross combination screws and a PHILIP2 # screwdriver.
2. Use a PHILIP2 # screwdriver and M6*12 outer hexagon cross combination screws to fix the L-bracket assembly horizontally on the side beam.
3. Fix the diagonal brace on two side beams using M6*12 outer hexagon cross combination screws and a screwdriver.
4. Fix the four bottom plates on four corners of the lower rack using the M6*12 outer hexagon cross combination screws and a PHILIP2# screwdriver.
5. Screw the base into the bottom plate and fix it with a PHILIP2# screwdriver or by hand.
6. To fix the rack on the wall, use a PHILIP2# screwdriver to install the rack fastener at the M6 screw hole above the rack and fix it with M612 outer hexagon cross combination screws. Fix the other side of the rack with the wall using M6100 expansion screws. To fix two racks together, install the rack fastener at the M6 screw hole above the rack, and fix them together with M6*12 outer hexagon cross combination screws and M6 nuts.

Note: Please read the manual for reference.

5.5 Update description of Rack
5.5.1 3U-HRack 2G Parts description

5.5.2 Update Installation of Rack

1. Take out two side beams and top and bottom beams and assemble them into a rectangular frame, connect the two top beams with the side beams, and then fix the side beams and top beams with the round head hexagon combination screws and hexagonal wrench. After fixing, take two bottom beams and connect the side beams, and fix the side beams and bottom beams with the round head hexagon socket combination screws and hexagonal wrench.
2. The left and right diagonal braces are fixed on both sides of the beam with round head hexagon combination screws and hexagon wrenches.
3. Fix the two left base plate units to the lower left and upper right corners of the lower rack using the round head hexagon socket combination screws and hexagonal wrench. Similarly, fix the two right base plate units to the upper left and lower right corners of the lower rack using the roundhead hexagon combination screws and the hexagonal wrench.
4. Screw the base into the bottom plate and secure it with hexagonal wrench or by hand.
5. To fix the rack on the wall, use a hexagonal wrench to install the rack fastener on the socket combination screw hole above the rack and fix it with the socket combination screw. Fix the other side of the rack with the wall using round head hexagon combination screws. To fix two racks together, install the rack fasteners on the hexagon socket combination screw holes above the frame, and fix them together with hexagon socket combination screws and nuts.

5.6 Description of Battery Module

supply output
③| B+| Battery module positive pole (orange)
④| BCOM IN| Connection position of battery module communication and power supply input

5.7 Description of High-Voltage Control Box

Front
②| B+| Connection position of the common positive pole of the battery (orange)| Front
③| Air switch| Used to manually control the connection between the battery rack and external devices.| Front
④| USB| BMS upgrade interface and storage expansion interface| Front
⑤| BCOM| Communicative connection with the first battery module; and providing 12VDC power for the first battery module.| Front
⑥| Human-machine interface (HMI)| Display some important battery information.| Front
⑦| START| A start switch of 12VDC power inside the high-voltage control box| Front
⑧| HV light indicator| High-voltage hazard indicator (yellow)| Front
---|---|---|---
⑨| ALRM light indicator| Battery system fault alarm indicator (red)| Front
⑩| PCS-| Connection position of PCS negative pole (black)| Front
⑪| PCS+| Connection position of PCS positive pole (orange)| Front
⑫| Grounding wire identification| Connection to the battery rack and the ground point| Front
⑬| OUT COM| Connection position with next HVB-100A750V communication output| Rear
⑭| IN COM| Connection position with previous HVB-100A750V communication input| Rear
⑮| PCS COM| PCS COM battery communication terminal: (RJ45 port) follow the CAN protocol (default baud rate: 500bps) and RS485 protocol (default baud rate:9.6bps), used to output battery information to the inverter.| Rear
⑯| POWER| Connection position of external 12VDC power supply| Rear

5.8 Description of Battery Module in Rack

5.9 Installation of the Battery Module to the Rack

Insufficient or no grounding may cause an electric shock. Device malfunctions, and insufficient or no grounding may cause device damage and life-threatening electric shocks.
Note: Before installing the battery, please turn the manual switch of the high-voltage control box to the off position.

1. Install the lug on the battery module and high-voltage control box.

2. Insert the first battery module into the battery module rack at the bottom cluster rack; then in the order from bottom to the top, continue the installment in the same way till it reaches the twelfth floor. On the thirteenth floor, insert the slide of the cabinet at the top of the rack into the high-voltage control box.

3. After the battery module and control box is inserted into the rack, use M4*12 outer hexagon cross combination screws to fix all the lugs of the battery module and control box on the side beam in turn.

4. After the battery module is placed in the control box, take out a 140 mm communication cable to connect the communication port of the battery module and the high-voltage control box, and 11x110mm communication cables to connect the battery module communication port (IN-OUT) from top to bottom. (12 communication cables in total).
   ★ The communication port (OUT) of the battery module at the bottom is not connected to the communication cable. Instead, this port is sealed with a 120ohm terminal resistor.

5. Take out a 220 mm positive power cord and connect the positive pole of the battery module at the top to the positive pole of the high-voltage control box. Take out 11x200mm battery module power cords and connect the power ports (B- to B+) in a top to bottom order to form a series circuit. For aesthetics, connect the negative power pole of the first battery module to the negative power pole of the high-voltage control box from the bottom of the battery module to the back of the rack. On the back of the rack, a plane-head-shaped tie is used to secure the cable harness. (12 power cords in total)

6. Take out the external positive power cord EPCable5.0 and external negative power cord ENCable5.0, and plug them into PCS interfaces, respectively.

7. Take out the ground wire A and connect one end of it to the M4 rivet nut of the high-voltage control box panel, and the other end to any M6 screw hole of the cross beam above the rack. Take out the ground wire B (user need to prepare in advance) and connect one end of it to any M6 screw hole of the cross beam under the rack, and the other end to the customer’s grounding point. (The length of the ground wire B is determined based on the customer’s condition.)

5.10 Procedure for configuring battery packs

Steps:

1. After connecting the battery cables, press the air switch button on the high-voltage control box to turn OFF to ON.
2. Press the start button and wait for the screen to light up.
3. Click the icon on screen to enter the maintenance system password confirmation interface.
4. Enter the password 123 and press the Confirm key to enter the main interface of system maintenance. The operation shall be performed by a professional.
5. Click “BMU Number” in the lower left corner, enter the number of packs in system and click “OK” to finish configuring the number of packs.
6. After the setting is successful, you need to restart. Click the Start button to restart, wait for about 8 seconds until the yellow HV light indicator comes on.

5.11 External 12V Power Supply of High-Voltage Control Box
To operate the high-voltage control box with an external 12V power supply, please contact our service personnel. Hotline: +86 0574 8612 0560, Email: service-ess@deye.com.cn. In the factory configuration, the high-voltage control box is supplied with working voltage from an internal power supply unit. If your plan requires an external 12V power supply, an adaptive version and a high-voltage control box can be provided as requested. Please contact our after-sales service personnel for details.

BOS-G’ User Interface

6.1. Main Interface
The default interface will appear after powering on. If the screen is not touched for more than 13 minutes, it will darken and the default interface replaces the other interface. Click this screen to enter the user interface.

6.2 Description of User Interface

(1) Basic Parameters

Wi-Fi Icon| • No Wi-Fi icon on the screen indicates no Wi-Fi signal.
• The flashing Wi-Fi icon on the screen indicates the Wi-Fi is in connecting.
• The Wi-Fi icon on the screen indicates the Wi-Fi is connected.
---|---
System maintenance icon| Click this icon to enter the system maintenance interface.
Voltage| Total battery voltage
Current| Battery current, the positive value representing discharge, the negative value representing charge
SOC| Battery remaining energy
Total energy| Accumulated discharging energy

(2) Fault Indication:
When the corresponding fault type occurs, the red background indicator on the screen will light up.

6.3 Fault viewing interface
Click the icon on screen to enter the maintenance system password confirmation interface.

Enter the password 123 and press the Confirm key.

The enter main interface of system. The operation shall be performed by a professional.

Fault warning:
OV turns red: expression overvoltage, click OV to view the detail fault.
UV turns red: expression undervoltage, click UV to view the detail fault.
OT turns red: expression overtemperature, click OT to view the detail fault.
ISO turns red: expression Insulation failure, there is a risk of current leakage, click ISO to view the detail fault.
OC turns red: expression charging overcurrent, click OC to view the detail fault.
OF turns red: expression other faults, click OF to view the detail fault.

6.4 Maintenance Interface
For safety, please unplug the power cord of the positive and negative interfaces before maintenance.

Note: When inserting the SD card, unplug the battery power cord and manually turn the air switch to the off position.

BOS-G’ fault description

Different types of faults are below:

| Fault types| Trigger conditions
---|---|---
Charge over-current alarm| Exceeding the parameter set value and set time (More than 105A, 2s; more than 125A, 5s; more than 140A, 2s; lower than 5℃, set value*0.5)
Charge over-current protection
Discharge over-current alarm
Discharge over-current protection
System faults| Charge overtemperature alarm| Exceeding the parameter set value and set time (>45℃, 2s)
---|---|---
Charge overtemperature protection| Exceeding the parameter set value and set time (>50℃, 2s)
Discharge overtemperature alarm| Exceeding the parameter set value and set time (>50℃, 2s)
Discharge overtemperature protection| Exceeding the parameter set value and set time (>55℃, 2s)
Charge under temperature alarm| Exceeding the parameter set value and set time (<5℃, 2s)
Charge under temperature protection| Exceeding the parameter set value and set time (<0℃, 2s)
Discharge under temperature alarm| Exceeding the parameter set value and set time (<-10℃, 2s)
Discharge under temperature protection| Exceeding the parameter set value and set time (<-20 ℃, 2s)
Excessive differential voltage alarm| Exceeding the parameter set value and set time (>500mv, 2s)
Excessive differential voltage protection| Exceeding the parameter set value and set time (>800mv, 2s)
Excessive differential temperature alarm| Exceeding the parameter set value and set time (>10℃, 2s)
Excessive differential temperature protection| Exceeding the parameter set value and set time (>15℃, 2s)
Cell overvoltage alarm| To maintain consistency, cut off the charging immediately when the full charge calibration rated voltage of 3.6V is reached. When the voltage drops to 3.35V, restart it with the turned-off red light indicator. All protective red light indicators are always on!
Cell overvoltage protection
Cell undervoltage alarm
Cell undervoltage protection
Pre-charge resistor overtemperature alarm| Exceeding the parameter set value and set time (>55℃, 2s)
Pre-charge resistor overtemperature protection| Exceeding the parameter set value and set time (>65℃, 2s)
Insulation level 1| Exceeding the parameter set value and set time
Insulation level 2| Exceeding the parameter set value and set time
Heating film overtemperature alarm| Exceeding the parameter set value and set time (>75℃, 2s)
Heating film overtemperature protection| Exceeding the parameter set value and set time (>80℃, 2s)
BMS connector| Exceeding the parameter set value and set time
System faults| overtemperature alarm|
---|---|---
BMS connector overtemperature protection| Exceeding the parameter set value and set time
BMU connector overtemperature alarm| Exceeding the parameter set value and set time
BMU connector overtemperature protection| Exceeding the parameter set value and set time
Power loop overtemperature alarm| Exceeding the parameter set value and set time
Power loop overtemperature protection| Exceeding the parameter set value and set time
SOC too low| Exceeding the parameter set value and set time
Total voltage too high alarm| Exceeding the parameter set value and set time
Total voltage too high protection| Exceeding the parameter set value and set time
Total voltage too low alarm| Exceeding the parameter set value and set time
Total voltage too low protection| Exceeding the parameter set value and set time
Discharge relay adhesion| Relay feedback information state adhesion
Charge relay adhesion| Relay feedback information state adhesion
Heating relay adhesion| High voltage is detected after disconnecting the heating relay
Limit protection| Exceeding the parameter set value and set time
Abnormal power supply voltage| Exceeding the parameter set value and set time
Master positive relay adhesion| Relay feedback information state adhesion
Fuse Blown| No high voltage is detected after the loop relay is closed
Repeated BMU address fault| BMU with the same number
INTER-CAN BUS communication failure| Loss of communication between BMS
PCS-CAN BUS communication failure| The heartbeat message of the inverter is not received for a long time
RS485 communication failure| Inverter RS485 access is not received for a long time
Abnormal RS485 communication| C
| External total voltage acquisition fault| /
---|---|---
Internal total voltage acquisition fault| The difference between the acquired internal total voltage and the accumulated internal total voltage exceeding the set value
SCHG total voltage acquisition fault| /
Cell voltage acquisition fault| The cell voltage acquired is 0
Temperature acquisition failure| The temperature acquired is -40℃
Current acquisition fault| /
Current module fault| Abnormal Hall current/reference voltage
EEPROM storage failure| EEPROM write failure during self-test
RTC clock fault| The external RTC failed to enable the charging function
Pre-charge failure| Pre-charge timeout
Charging voltage too low| The minimum cell voltage is lower than the set value
BMU lost| BMU message not received for a long time
Abnormal number of BMU| The number of BMU addresses is different from the number of set parameters

Note: For more information, please contact us. Email: service- ess@deye.com.cn, Service Hotline: +86 0574 8612 0560.

Summary of fault types in BOS-G’S screen and HVESS-Monitor

Abbreviation| Screen protection event description| HVESS- Monitor protection event description| HVESS-Monitor alarm event description
---|---|---|---
OT| BMS southward connector overtemperature| BMU connector overtemperature protection| BMU connector overtemperature alarm
BMS northward connector overtemperature| BMS connector overtemperature protection| BMS connector overtemperature alarm
Pre-charge resistor overtemperature level-2 alarm| Pre-charge resistor overtemperature protection| Pre-charge resistor overtemperature alarm
Heating film overtemperature level-2 alarm| Heating film overtemperature protection| Heating film overtemperature alarm
Charge overtemperature level-2 alarm| Charge overtemperature protection| Charging overtemperature alarm
Discharge overtemperature level-2 alarm| Discharge overtemperature protection| Discharge over temperature alarm
/| Power loop overtemperature protection| Power loop overtemperature alarm
UT| Charge under temperature level-2 alarm| Charge under temperature protection| Charge under temperature alarm
Discharge under temperature level-2 alarm| Discharge under temperature protection| Discharge under temperature alarm
OC| Charge overcurrent level-2 alarm| Charge overcurrent protection| Charge overcurrent alarm
Discharge overcurrent level-2 alarm| Discharge overcurrent protection| Discharge overcurrent alarm
DV| Excessive differential voltage level-2 alarm| Excessive differential voltage protection| Excessive differential voltage alarm
DT| Excessive differential temperature level-2 alarm| Excessive differential temperature protection| Excessive differential temperature alarm
OV| Total charge voltage too high| Total voltage too high protection| Total voltage too high alarm
Cell overvoltage level 2 alarm| Cell overvoltage protection| Cell overvoltage alarm
UV| Charge voltage too low| Charging voltage too low| /
Total discharge voltage too| Total voltage too low protection| Total voltage too low alarm
| low| |
---|---|---|---
Cell undervoltage level-2 alarm| Cell undervoltage protection| Cell undervoltage alarm
OF| Abnormal numbers of BMU| Abnormal numbers of BMU| /
BMU lost| BMU lost| /
RTC clock fault| RTC clock fault| /
Current module fault| Current module fault| /
SCHG total voltage acquisition fault| SCHG total voltage acquisition fault| /
Abnormal RS485 communication| Abnormal RS485 communication| /
RS485 communication failure| RS485 communication failure| /
PCS-CAN BUS communication failure| PCS-CAN BUS communication failure| /
Repeated BMS address fault| Repeated BMS address fault| /
Repeated BMU address fault| Repeated BMU address fault| /
Abnormal power supply voltage| Abnormal power supply voltage| /
Heating relay adhesion| Heating relay adhesion| /
SOC too low| SOC too low| /
SOC too high| SOC too high protection| /
Fuse Blown| Fuse Blown| /
Charge relay adhesion| Charge relay adhesion| /
Discharge relay adhesion| Discharge relay adhesion| /
Master positive relay adhesion| Master positive relay adhesion| /
Temperature acquisition failure| Temperature acquisition failure| /
Cell voltage acquisition fault| Cell voltage acquisition fault| /
Inter communication failure| INTER-CAN BUS communication failure| /
Pre-charge failure| Pre-charge failure| /
Insulation level 2 alarm| Insulation level 2| Insulation level 1
External total voltage acquisition fault| External total voltage acquisition fault| /
Internal total voltage acquisition fault| Internal total voltage acquisition fault| /
Current acquisition fault| Current acquisition fault| /
Limit protection| Limit protection| /
EEPROM failure| EEPROM storage failure| /
ISO EEPROM failure| Insulation level 2| Insulation level 2| /
---|---|---|---

Maintenance and upgrade

Warning! Improper decommissioning may cause damage to the equipment and/or battery inverter.
Before maintenance, ensure that BOS-G is decommissioned according to relevant provisions.
Note: All maintenance work shall comply with local applicable regulations and standards.

The USB disk port of BOS-G has the functions of upgrading firmware and recording battery data, which can be used as an auxiliary tool.

9.1 Maintenance of BOS-G
To ensure safe operation, all plug connections must be checked. If necessary, relevant operators shall press them back into place at least once a year.

The following inspection or maintenance must be carried out once a year:

• General visual inspection
• Check all tightened electrical connections. Check the tightening torque according to the values in the following table. Loose connections must be retightened to the specified torque.

• Using the monitoring software, check whether the SoC, SoH, battery voltage and temperature of the battery module are abnormal.
• Shut down and restart BOS-G once a year.

Note: If the system is installed in a polluted environment, maintenance and cleaning must be carried out at short intervals.
Note: Clean the battery rack with a dry-cleaning cloth. Ensure that no moisture comes into contact with the battery connections. Do not use solvents.

9.2 USB’s Upgrade Step

1. USB type: USB2.0, FAT32;
2. Create the upgrade folder according to the directory;
3. Place the upgrade file provided by the supplier in the upgrade folder;
4. Turn on the battery, and insert the USB flash disk after the blue indicator is on;
5. After the blue light indicator flashes and turns off, pull out the USB flash disk to complete the upgrade. Do not turn off the battery during the process.
6. After the blue light indicator of the battery lights up again, check the version number through the screen or app and verify the upgrade result.

Battery Module Storage

1. To ensure the battery service life, the storage temperature shall be kept between 0°C~35°C.
2. The battery shall be cycled at least once every 6 months.
3. To minimize self-discharge in a long storage period, disconnect the battery connection (1/2) of the high-voltage control box of the DC connecting cable. This will interrupt the use of the 12 V power supply installed in the high-voltage control box and prevent the battery from self-discharging.

Disposal

For details related to the disposal of battery modules, please contact us. Service Hotline: +86 0574 8612 0560, Email: service-ess@deye.com.cn. For more information, please visit http://deyeess.com.
Observe applicable regulations on waste battery disposal. Immediately stop the use of damaged batteries. Please contact your installer or sales partner before disposal. Ensure that the battery is not exposed to moisture or direct sunlight.

Attention:

1. Do not dispose of batteries and rechargeable batteries as domestic waste!
   You are legally obliged to return used batteries and rechargeable batteries.

2. Waste batteries may contain pollutants that can damage the environment or your health if improperly stored or handled.

3. Batteries also contain iron, lithium and other important raw materials, which can be recycled.

For more information, please visit http://www.deyeess.com. Do not dispose of batteries as household waste!

Appendix

12.1 Circuit diagram for on grid systemwith 12V supply

12.2 System Circuit diagram

Legal notice

Installation and Operation Manual for BOS-G
Last revision: 09/2022
Subject to technical changes.
Deye ESS Technology Co., Ltd
China
Service Hotline: +86 0574 8612 0560
service-ess@deye.com.cn
www.deyeess.com

Legal Statement
The information contained in the document is the property of Deye ESS Technology Co., Ltd. D All information shall not be published in whole or in part without the written permission of Deye ESS Technology Co., Ltd.

References

• Solar Battery Manufacturer & Supplier - Deye ESS
• Solar Battery Manufacturer & Supplier - Deye ESS

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