User Manual
V Series
LITHIUM ION BATTERIES
Information Version: 1.0
V Series Lithium Ion Batteries
Pytes U Series LFP Battery
User Manual
Dear valued customer,
Thank you for purchasing our Pytes V series LFP battery for home energy storage system.
Our V series battery pack is designed to provide safe, high-performance energy storage solutions for a variety of applications. The compact and easy-to-install battery pack can be used as a basic building block in an energy storage system by connecting in parallel. It is widely used in residential, small commercial, and industrial energy storage systems, as well as telecommunication stations.
We strongly recommend that you carefully read this manual before using the product. This manual provides all the necessary information on installation, usage of the V series battery pack. Please be advised that only qualified personnel(such as an electrician) should install and perform maintenance on the battery pack.
Itis important to keep in mind the boundaries of use, as described in this manual. The V series battery pack is not intended for use in medical or aviation-related applications, and should only be used for its intended purpose as described in this manual. Improper use of the battery pack will void the warranty of the product, and Pytes cannot be held responsible for any damage caused by improper or incorrect use of the product.
For your safety and the safety of others, please follow all user safety instructions during the use of this product. This manual is intended for the installers and users of the V series battery pack.
Please keep this manual in a safe location, as it is the original manual. For the latest version of all manuals, please visit our website at http://www.pytesgroup.com.
Thank you again for choosing Pytes, and please do not hesitate to contact us if you have any questions or concerns about your V series battery pack.
Best regards,
Pytes
Shanghai Pytes Energy CO., LTD.
Add: No.3492 Jingian Road, Fengxian District, Shanghai, China.
Website: http://www.pytesgroup.com
Email: ess_support@pytesgroup.com
Before using
Please read and follow these instructions carefully:
Warning
This equipment should only be installed, operated by qualified personnel (electricians) The local safety regulations and relevant operating procedures must be followed during the installation, operation and maintenance of the equipment, otherwise the equipment may be damaged. The safety precautions mentioned in this manual are supplementary to the local safety regulations.
Caution
Do not short-circuit the Li-ion battery.
Follow the positive (+) and negative (-) marks on the Li-ion battery and equipment and ensure correct use. Do not reverse the Li-ion battery.
Do not dismantle, crush, puncture, open, or shred the Li-ion battery.
Before removing or reconnecting with the running system, make sure to turn off the power and shut down the system to avoid the risk of electric shock.
Do not expose the Li-ion battery to heat o fire. In case of fire, use a dry powder fire extinguisher.
Do not dismantle any part of the system without contacting PYTES or PYTES authorized technical engineers. System failure caused by such actions will not be covered by the warranty.
Before operating the inverter, ensure that all batteries have been started up.
The following precautions should be taken when working on batteries.
a) Shut down the power and loads before connecting or disconnecting battery terminals.
b) Do not wear any metal objects such as watches and rings.
c ) Use tools with insulated handles.
d ) Do not lay tools or metal parts on top of batteries
e ) Wear personal protective equipment.
f ) Make sure the battery is well grounded. Contact with any part of a poorly grounded or ungrounded battery can cause electric shock and bums by high short-circuit current.
Danger
Do not dispose of batteries in fire, as the batteries may explode.
Keep the Li-ion battery away from water, dust, and contamination to avoid explosion or other harmful conditions that may even lead to personal injury.
Do not open or mutilate batteries. Released electrolyte can be harmful to the skin and eyes and may be toxic.
A battery can pose a risk of electric shock and burns due to high short-circuit current.
A malfunctioning battery can reach temperatures that exceed the safe contact level.
Symbols
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Read the instruction manual before starting installation and operation. |
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Caution, do not dispose of batteries in a fire, the battery may explode. |
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caution, a battery can present a risk of electric shock and burns by high short-circuit current. do not short-circuit the Li-ion battery. |
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Caution, do not dispose the product with household wastes. |
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Danger, keep the Li-ion battery away from water, dust and contamination, otherwise it may cause explosion or lead to personal injury. |
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Danger, do not place near open flame or flammable materials. |
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Danger, do not place at children or pets touchable areas. |
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Recyclable. |
Specifications
Table 1-1 Battery Pack Specifications
| Battery Model | V5º | V5ºa |
| Power Terminal | PHOENIX h16 Bolt | Amphenol SurLok Plus 8.0mm |
| Chemistry | LFP | |
| Nominal Voltage | 51.2V | |
| Voltage Range | 47.5V ∼ 57.6V | |
| Nominal Capacity | 100Ah | |
| Nominal Energy | 5.12kWh | |
| Unit Dimension | L440mm*EW530minvH140mm(3 2U) L17 32in’W20 87in*I-15.51in(3 2U) |
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| Unit Weight | 44KG / 97Ibs | |
| Recommended Charge/ Discharge Current¹) | 75A | |
| Max Continuous Charge/ Discharge Current² | 100A | |
| Peak Charge/ Discharge Current | 101A-120A (3min), 121A-180A (15sec) | |
| Round-Trip Efficiency | ≥95% | |
| Communication Protocol | RS485, CAN, WiFi (W/ Optional Device) | |
| Cycle life Pi | ≥6000cycles | |
| Calendar Life | ≥ 10years | |
| Operating Temperature | Charge: 0°C ∼ 45°C(32°F ∼ 113,) Discharge: -10°C ∼ 50°C(14°F ∼ 122°F) |
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| Certificates | UN38.3, CE, UL1973, UL9540A, UL9540,1EC62619, CEC, SGIP | |
| Storage Temperature | Within 1month: -20°C ∼ 50°C(-4°F c 122°F) 1-3months: -10°C ∼ 40°C(14°F ∼ 104°F) 3-12months: 20°C ∼ 25°C(68°F ∼ 77°F) |
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| Heating System | Temperature Rise 10°C(18°FyHour, Operation Temperature -18°C ∼ 10°C(-0.4°F ∼ 50°F) |
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[1], [2): The recommended and Max continuous charge and discharge current s for a battery cell temperature within 10°C~40°C(50°F~104°F)to consider. It will result in a derating on current if out of the temperature range.
[3]: Test conditions 0.2C Charging/Discharging, @25°C(77°F), 80% DOD.
[4]: Integrated with some inverters, heating system may consume enengy from battery when there’s voltage difference among ‘system modules, between 0°C/32°F to 5°C/41°F. Follow 5.3.3 of this manual for multiple batte power cable connection to ‘minimize influence of the circular current, thus decrease battery energy loss.
1.1 Product standard configuration
V5° Version
| Items | Quantity | Specifications | pictures |
| V5° Battery | 1Pc | LFP battery pack Voltage: 51.2V Capacity: 100Ah Energy:5.12kWh Power Terminal: PHOENIX C-ES-FTB 25-70 |
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| Flexible Busbar | 2pc | Busbar for parallel connection between batteries: Length: 190mm/Ampacity: 300A |
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| Cascade Communication Cable |
1pc | Function: cascade communication between batteries Length: 350mm Communication protocols: CAN / RS485 |
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| Grounding Cable | 1pc | 1 OAWG/1000mm/SC10-6 |  |
V5°a Version
| Items | Quantity | Specifications | pictures |
| V5° Battery | 1pc | LFP battery pack Voltage: 51.2V Capacity: 100Ah Energy:5.12kWh Power Terminal: Amphenol Surlok 8.0mm Socket |
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| Flexible Busbar | 1set | Cable for parallel connection between batteries; UL10269- OAWG / 200mm / Amphenol Surlok 8.0mm; Ampacity: 200A |  |
| Cascade communication Cable | 1 pc | Function: cascade communication between batteries Length: 350mm Communication protocols: CAN / RS485 |
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| Grounding Cable | 1pc | 10AWG/1000mm/SC10-6 | |
1.2 BMS Functions
| Protection and Alarm | Management and Monitor |
| Charge / Discharge End Cut-off | Cells Balance |
| Charge over Voltage Protection | Intelligent Charge |
| Charge / Discharge over Current Protection | Charge/Discharge Current Limitation |
| High / Low Temperature Warning Over / Under Temperature Protection | Remaining Power Galculation |
| Short Circuit Protection | Administrator Monitoring |
| Power Cable Reverse Protection | Log Record |
Interface and protection functions
2.1 Battery front panel schematic 
2.2 Components
| No. | Name | Label | Functions description |
| 1 | Ground |  |
Connection for ground cable |
| 2 | Power button | POWER | When switched to “ON”, the system can be activated by the “SW’ key or external power supply; when switched to “OFF”, the system is off |
| 3 | Soft start switch SW |
When the on/off button is “ON”, press and hold this button for 1 second to enter the startup or sleep mode. | |
| 4 | DIP Switch | ADD | Set according to inverter brand, see checking list |
| 5 | Running Light | RUN | Green light. The light flashes when Standby. The light is constantly on when charging. The light blinks when discharging. |
| Alarm Indicator | ALM | Red light. The light flashes when Alarming. The light is continuously on when protected. | |
| SOC indicator | SOC | Light bar shows current remaining capacity. | |
| 6 | External CAN communication port | CAN | RJ45 port, follows CAN protocol, for outputting battery information. |
| 7 | External RS-485 communication port | RS485 | RJ45 port, follows RS485 protocol, for outputting battery information. |
| 8 | Cascade communication port | Prot 1/0 | RJ45 ports, connect Port 1 of the previous battery to Port 0 of the next one. The Port 0 of the master battery is vacant. |
| 19 | Negative Power Terminal’ | Negative input and output interface | |
| 10 | Positive Power Terminal | Positive input and output interface | |
| 11 | Dry Contact | N1-IIN1+ COM2/NO2 C0 11/413/NO3 CON14/N04 | 1 way input and 3 ways output dry contact signal. |
| 12 | I LoT port |  |
Real-time monitoring of battery status and remote upgrade |
Warning: 6,7,8,9,10,1,12is DVC-A circuit, they shall not be connected to DVC-BIC circuit when installed, or hazard shock will occur.
Operating Environment
- Battery operating environment requirements:
- Operating Temperature: -10°C~50°C(14°F~122°F)
- Relative Humidity: 20%-80%, no condensation
- Altitude: <4000m
- Site environment requirements: Away from heat source, avoid direct sunlight, no corrosive gases, no explosive gases, no insulating gases, no insulating conductive dust. Install in cabinet which shall not be opened without dedicated tools
- Install in a restricted access area.
Packaging, transportation, storage requirements
4.1 Transportation
Always check all applicable local, national, and international regulations before transporting Li-ion Batteries.
During transportation, protect the battery from severe vibration, shock or squeezing, and from exposure to sunlight and rain.
During the loading and unloading process, the battery should be handled gently to prevent it from falling, rolling and being subjected to heavy pressure.
4.2 Storage
- Relative humidity: 20%-80%, no condensation
- Altitude: <4000m
- Store the battery in a cool, dry place, away from heat sources and no direct sunlight.
- Keep away from conductive substances such as conductive dust.
For long-term storage (>6 months), charge the LFP battery to more than 90% of its rated capacity. The battery needs to be charged to more than 90% of its rated capacity every 6 months.
Keep the SOC of the battery at 40%-60% during storage. The Self-discharge of the LFP battery pack is 1-2% per month. If there is no power left when checking the LFP battery, do not charge or use it without permission, contact your installer for the next step.
Follow the storage instructions in this section and refer to Table 1-1 Battery Pack Specifications for storage temperature to optimize the battery lifespan during storage. Any failure or damage to the battery caused by failure of following these instructions is not covered by the warranty.
Installation and configuration
5.1 Installation preparation
5.1.1 Safety Requirements
Only those who have received training in the power system and possess a comprehensive understand- ing of the same are allowed to install the equipment. It is imperative to follow the safety regulations defined by local authorities and adhere to the safety requirements listed below during the installation process.
Before installing or removing the battery, make sure that the system is disconnected from any power source and that the battery system is tumed off. Distribution cabling needs to be handled carefully with essential protective measures to avoid any safety hazards during the maintenance and operation.
5.1.2 Checking the operation environment
The operation environment must comply with the requirements outlined in Chapter 3, “Operation Environment.” If not, necessary adjustments must be made and subsequently reevaluated.
5.1.3 Tools
The tools that may be used are shown in Table 5-1
Table 5-1 Tools
| Tools | |
| Screwdriver (Slotted, Phillips) | Multimeter |
| Wrench | Clip-on ammeter |
| Diagonal pliers | Insulating tape |
| Thermometer | Pliers |
| Anti-static wrist ring | Clip Pliers |
| Tapes | Strippers |
5.1.4 Technical preparation
Electrical interface settings:
If the battery is directly connected to the energy storage inverter or DC charger, please verify if the operating voltage, current, and power of the equipment align with the battery parameters listed in “Table 1-1 Battery Pack Specifications”
Safety inspection:
Fire-fighting equipment such as portable dry powder fire extinguishers in proximity to the battery is mandatory. Dangerous substances such as flammable or explosive materials must not be stored near the battery.
5.2 Unpacking
- When the battery arrives at the installation site, it must be unloaded and stored properly and prevented from the direct sunshine and rain. Before installation, check if there is any component missing according to 1.1 product standard configuration and check whether the box appearance is intact.
- Carefully handling the unpacking to preserve the insulation coating on the casing’s surface.
- Please contact PYTES if there is any damage or missing of products and / or components.
5.3 Installation
5.3.1 Install the battery
The V series can be installed either vertically or horizontally. The instructions in this chapter are only for horizontal installation, while vertical installation follows a similar process. All equipment must be placed steadily after installation.
5.3.2 Connect Ground cable
Loosen the screw on the grounding position of the front panel of the battery and attach the lug of the ground cable over the screw. Use a screwdriver to tighten the screw and connect the other end of the ground cable to a reliable grounding point.
External Bi-polar over current protection devices and Bi-polar external isolator shall be equipped The diameter of the ground cable must be 2 6mm2 / 12kcmilExternal Bi-polar over current protection devices and Bi-polar external isolator shall be equipped
The minimum diameter must be >=6mm2.
Note: The grounding resistance should be less than 0.10.
5.3.3 Connecting the power cable
Before connecting the power cable, connect and disconnect the cable to identify the positive and negative terminals, then make a mark respectively. After the cable is connected, measure whether there is short-circuit or reverse connection.
Select the correct cable based on your loads by referencing to the table below:
| AWG | Area | Standard Current | Max. Current | |
| (kcmil) | (mm²) | (A) | (A) | |
| 4/0 | 211. | 107. | 423. | 483. |
| 3/0 | 168. | 85. | 336. | 383. |
| 2/0 | 133 | 6743 | 266. | 304. |
| 1’0 | 106. | 53. | 211. | 241. |
| 1 | 84. | 42. | 167. | 191. |
| 2 | 66. | 34. | 133. | 161. |
| 3 | 53. | 27. | 105. | 120.0 |
| 4 | 42. | 21. | 84. | 95. |
Please select suitable power cable according to maximum current that may pass through the circuit. If you need advice, please contact your installer for help.
Connecting the power cables:
- Power cable connection instructions of Single-Rack:
♦ Single battery:
Connect the positive and negative terminals of the battery to the battery port of the energy storage inverter with power cables.
♦ Multiple batteries (Max number 14):
The connection of multiple batteries is only permitted in parallel. Firstly, connect the positive and negative terminals of the batteries in parallel with the supplied flexible busbar (for up to three batteries, no additional accessories are required). Next connect the positive and negative terminals of the battery port of energy storage inverter to one of the batteries with power cables. But due to limitations in battery ccommunication and power cables, a maximum of 14 batteries can be connected in parallel, and a
busbar or junction box should be used for convergence.
Regardless of the number of batteries in parallel, the standard charging and discharging current for a single battery remains the same, please refer to “Table 1-1”. The capacity can be increased by cconnecting the batteries in parallel, but due to the limitations of BMS and power cable, a maximum of 14 batteries can be connected in parallel and a busbar or junction box should be used for confluence.
Warning: Connecting batteries in series is forbidden, as it can create a high voltage that poses a hazardous shock risk.
Figure 5-1 Schematic diagram of power cable connection
Note: When multiple batteries are connected in parallel, in order to minimize the influence of the circular current, each battery can be connected to a busbar with power cable. The length, thickness, material, and resistance of the cables connected in parallel must be the same.
Warning: Batteries connected in series are forbidden, high voltage would lead to hazard shock. - Power cable connection instructions of Multi-Rack:
Connect the overall power cables of each rack to the convergence bus bar (or junction box) in parallel, then connect them to the energy storage inverter.
5.3.4 Connecting communication cables
- Communication cable connection instructions of Single-Rack:
♦ Single battery:
Select the corresponding port based on the communication protocol between the battery and energy storage inverter (RS485/CAN), and then insert the communication cable into the port
♦ Multiple batteries (Max number 14):
The communication between the master and the slaves is carried out in a cascade mode, wherein one battery acts as the master while the others are slaves. Please refer to the picture below for the cascade connection. Users need to insert the communication cables into the relevant link ports between the batteries and keep in mind that :
1.Keep the master Port 0 free;
2 Keep the end slave Port 1 free;
- Communication cable connection instructions of Multi-Rack:
Connect the master battery of each rack to a hub with a standard communication cable. A Hub is required for to build up the communication between inverter and battery (more than 14 batteries or more than one rack)
Note: The system may not be able to communicate if not followed the instruction.
5.3.5 WIFI Connection
The battery provides a WiFi port for data collection and upload to the monitoring cloud platform, which supports remote viewing of battery data and enables remote firmware upgrades. This product can be purchased separately from PYTES authorized resellers/distributors/installers.
- Diagram
- Connecting steps:
Step 1: Insert the WiFi stick into the LoT Port on the battery panel.
Step 2: Create an account on the cloud platform and bind the WiFi stick
Step 3: Pair the WiFi stick with a wireless network (see WFi stick user manual for details)
5.4 Procedure of starting/Shut down the whole system
Make sure that all batteries have been powered on prior to running the inverter. This is to avoid battery shock by the in-rush current of the large capacitors of the inverter. 
Power on Procedure
Step 1: Tum on all power buttons.
Step 2: Press only the master battery SW button for one second
Please ensure that all batteries have been activated before turning on the inverter. This will help prevent battery shock caused by the inrush current of the large capacitors in the inverter.
Shut down Procedure
Step 1: Press and hold the SW button of the master battery for three seconds.
Step 2: Tum off all power buttons.
Please wait for all battery lights to go out before tuming off the power buttons.
Note: Batteries must be placed in a locked cabinet or room with a 25mm/tinch horizontal gap for ventilation between them.
The battery cabinet needs to support the total weight of the batteries and necessary accessories.
–End of installation—
Communication
The battery features RS-232C, RS-485, and CAN communication ports. The battery status can be obtained.
CAN
The CAN communication terminal (RJ45 port) follows CAN protocol, to output batteries information
RS485
The RS485 communication terminal (RJ45 port) follows RS485 protocol, to output batteries information.
Rs232
The RS232 communication terminal (RJ45 port) follows RS232 protocol, to upgrade the software and to communicate with your PC.
Link Port 0,1
The Port 0 and Port 1 communication terminals (RJ45 ports) follow the CAN/RS485 protocol for cascade communication between multiple parallel batteries.
LoT Port
4 Pin Circular Connector for connecting with WiFi sticks
6.1 RS232 port
Default baud rate of RS-232C ports: 115200bps.
Table 6-1 RS232 Connector Pin Assignments
| Pin number | RS-232C port |
| 1 | |
| 2 | |
| 3 | RXD |
| 4 | GND |
| 5 | |
| 6 | TXD |
| 7 | |
| 8 |
6.2 RS485 port and CAN port.
Default baud rate of CAN port: 500K
Default baud rate of RS-485 port: 9600bps
Table 6-2 RS485 and CAN Connector Pin Assignments
| Pin number | Serial | Can |
| 1 | RS485B | |
| 2 | RS485A | |
| 3 | GND | |
| 4 | CANH | |
| 5 | CANL | |
| 6 | GND | |
| 7 | RS485A | |
| 8 | RS485B |
Troubleshooting
Please refer to the troubleshooting methods mentioned below. Please read the “Table 7-1 LED indica- tion” of this manual before troubleshooting to avoid false operations.
For example, the blinking or constant red light of the ALM alarm on the front panel does not necessarily indicate a faulty battery. In most cases, the “alarm” indication signifies normal operation and requires no troubleshooting. Furthermore, if the battery indicates “protection,” it will resume normal operation automatically once the “protection” status is released.
Table 7-1 LED indications
| Battery Status | Protection/Alarm/Normal | ALM | RUN | Capacity LED | Description |
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| Shut down | OFF | OFF | OFF | All off | |
| Power-on | Normal | ON | ON | ON | All lights stay on simultaneously for one second |
| Standby | Normal | OFF | Blink 1 | OFF | standby |
| Alarm | Blink 3 | OFF | OFF | Low voltage | |
| Charging | Normal | OFF | Light | Base on capacity | |
| Alarm | Blink 31 | Light | |||
| Protection | Light | OFF | OFF | Protection triggered, charging stops |
|
| Discharge | Normal | OFF | Blink 3 | Base on capacity | |
| Alarm | Blink 3 | ||||
| Protection | Light | I OFF | OFF | Protection triggered, discharging stops |
Note: The blinking descriptions: Blink 10.3s on/3.7s off”; Blink 2 “0.5s on /0.5 off”;Blink 30.5s on /1.5s off”; Blink 40.7s on / 9.3 off”
7.1 Unable to start
| Problem | Troubleshooting Steps | Solution |
| Press the POWER button to the “ON” state and press the SW button for 1 second, but the LED indicator doesn’t respond or all the LEDs are off after this 1s duration | 1. Confirm that the POWER button remains in the “ON” state 2. Charge the battery correctly and observe if the battery can be charged properly. |
1. If the battery enters into charging mode, it should return to its normal state after completing the charging process. 2. If not, please contact the local reseller or Pytes. |
7.2 Unable to charge
| Problem | Troubleshooting Steps | Solution |
| Thenotfully ezl battery camnot becharged properly. | 1. Confirm that the battery is turned on; 2.Inspect the power cable to make sure that it is correctly plugged in and that the charging circuit is functioning property; 3. Check the battery indicator LED to determine if the battery is under “Protection” state. If so, unplug the battery power cable, find the cause of the protection, and correct the issue before restarting the battery. 4. Ensure that the charging voltage meets the battery’s charging requirements. If not, adjust the power supply voltage to the proper range. |
If the battery st does not charge properly after following the steps, please contact the local reseller or Pytes. |
7.3 Unable to discharge
| Problem | Troubleshooting Steps | Solution |
| The battery cannotbe discharged properly. | 1. Confirm that the battery is turned on; 2. Check the power cabies to ensure that they are properly connected. 3. Unplug the battery power cable and measure the battery power output voitage. If the battery voltage is too low, charge it immedi- ately. 4. Check the battery indicator LED to see if the battery is under “Protection” state. If so, unplug the battery power cables, find the cause of the protection, resolve the issue, and thereafter restart the battery. |
If the battery still does not discharge properly after following the above steps, please contact the local reseller or Pytes. |
7.4 ALM indicator(alarm) constantly on
When the ALM indicator is constantly red and the other indicators are off, the battery is in the “Protection” state. Once the condition that triggered protection is released, the battery will automatically return to normal operation. However, there are a few issues requiring immediate measures.
| Problem | Troubleshooting Steps | Solution |
| The ALM indicator remains in a constant state of red, while all other indicators remain inactive. |
1.Check the power cables to ensure that they are properly connected. 2.Check whether the charging voltage, charging/discharging current, battery/cell voltage and temperature meet the relevant protection conditions, and release the “protection” state to ensure that the voltage, current and temperature are within the normal working range. |
If the battery protection state cannot be released, or if the ALM indicator is constantly on when the battery is properly charged after it is restarted, please contact your local reseller or Pytes. |
Warning: Do not repair the battery if no authorization from Pytes!
Warranty Card
| Customer Information | |||
| Contact Name | |||
| Phone Number | |||
| Address | |||
| Product Information | |||
| Battery Model | Inverter Brand/Model | ||
| Battery Quantity | Inverter Quantity | ||
| Purchase Date | Inverter Using Time | ||
| Serial Number | on/off Grid | ||
| Installer Information | |||
| Installer Name | Installation Date | ||
| Problem Description | |||
| Photos of Battery Wiring | |||
| Photos of Inverter Wiring and Panels | |||
Shanghai PYTES Energy Co., LTD
Add: No.3492 Jingian Road,
Fengxian District, Shanghai, China
Tel: 021-57475852
Email: ess_support@pytesgroup.com
The right of interpretation belongs to Pytes Energy
Documents / Resources
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Pytes V Series Lithium Ion Batteries [pdf] User Manual V Series Lithium Ion Batteries, V Series, Lithium Ion Batteries, Ion Batteries, Batteries |
