Pytes V Series Lithium Ion Batteries

Introduction

Thank you for purchasing the Pytes V series LFP battery for your home energy storage system. The V series battery pack is designed to provide safe, high-performance energy storage solutions for various applications. It is compact, easy to install, and can be used as a building block in energy storage systems by connecting in parallel. It is widely used in residential, small commercial, and industrial energy storage systems, as well as telecommunication stations.

It is strongly recommended to read this manual carefully before using the product. This manual provides necessary information on installation and usage. Only qualified personnel, such as electricians, should install and maintain the battery pack. The V series battery pack is not intended for medical or aviation-related applications and should only be used for its intended purpose. Improper use voids the warranty, and Pytes is not responsible for any damage caused by incorrect use.

For safety, follow all user safety instructions. This manual is for installers and users. Keep it in a safe location. For the latest version, visit www.pytesgroup.com.

Contact Information:

Shanghai Pytes Energy CO., LTD.
Add: No.3492 Jinqian Road, Fengxian District, Shanghai, China.
Website: www.pytesgroup.com
Email: ess_support@pytesgroup.com

Before Using

Please read and follow these instructions carefully:

⚠️ Warning

This equipment should only be installed and operated by qualified personnel (electricians). Local safety regulations and operating procedures must be followed during installation, operation, and maintenance. Safety precautions in this manual supplement local regulations.

? Caution

• Do not short-circuit the Li-ion battery.
• Follow the positive (+) and negative (-) marks on the battery and equipment. Do not reverse the battery.
• Do not dismantle, crush, puncture, open, or shred the Li-ion battery.
• Before removing or reconnecting with a running system, turn off the power and shut down the system to avoid electric shock.
• Do not expose the Li-ion battery to heat or fire. Use a dry powder fire extinguisher in case of fire.
• Do not dismantle any part of the system without contacting PYTES or authorized technical engineers. System failure due to unauthorized actions is not covered by warranty.
• Before operating the inverter, ensure all batteries have been started up.

Precautions when working on batteries:

1. Shut down power and loads before connecting/disconnecting terminals.
2. Do not wear metal objects like watches and rings.
3. Use tools with insulated handles.
4. Do not lay tools or metal parts on top of batteries.
5. Wear personal protective equipment.
6. Ensure the battery is well grounded. Contact with poorly grounded or ungrounded batteries can cause electric shock and burns from high short-circuit current.

⚡ Danger

• Do not dispose of batteries in fire, as they may explode.
• Keep the Li-ion battery away from water, dust, and contamination to avoid explosion or other harmful conditions that may lead to personal injury.
• Do not open or mutilate batteries. Released electrolyte can be harmful to 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 exceeding safe contact levels.

Symbols

Specifications

Table 1-1 Battery Pack Specifications

[1], [2]: Recommended and Max continuous charge/discharge current is for battery cell temperature within 10°C~40°C (50°F~104°F). Derating occurs outside this range.

[3]: Test conditions: 0.2C Charging/Discharging, @25°C (77°F), 80% DOD.

[4]: Integrated heating system may consume energy when voltage differs between modules (0°C/32°F to 5°C/41°F). Refer to section 5.3.3 for power cable connection to minimize circular current and energy loss.

Product Standard Configuration

V5 Version

V5α Version

Interface and Protection Functions

BMS Functions

Battery Front Panel Schematic

The front panel of the Pytes V Series batteries includes various indicators and ports for operation and monitoring.

V5 Version Front Panel Layout:

• Indicators: Running Light (RUN), Alarm Indicator (ALM), SOC Indicator (light bar).
• Controls: Power Button, Start Switch (SW).
• Ports: Ground, DIP Switch, CAN/RS485 communication Port, IoT Port, Negative Power Terminal, Positive Power Terminal.

V5α Version Front Panel Layout:

• Indicators: Similar to V5, including Running Light, Alarm Indicator, SOC Indicator.
• Controls: Power Button, Start Switch (SW).
• Ports: Ground, DIP Switch, CONSOLE, CAN, RS485, PORT 1, PORT 0, Negative Power Terminal, Positive Power Terminal.

Note: 6,7,8,9,10,11,12 are DVC-A circuits and should not be connected to DVC-B/C circuits to avoid hazard shock.

Components

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 a cabinet that cannot be opened without dedicated tools.
• Install in a restricted access area.

Packaging, Transportation, and Storage Requirements

4.1 Transportation

Always check applicable local, national, and international regulations before transporting Li-ion Batteries. During transportation, protect the battery from severe vibration, shock, squeezing, and exposure to sunlight and rain. Handle gently during loading and unloading to prevent falling, rolling, or 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 direct sunlight.
• Keep away from conductive substances like conductive dust.
• For long-term storage (>6 months), charge the LFP battery to over 90% of its rated capacity every 6 months.
• Maintain battery SOC at 40%-60% during storage. The self-discharge rate is 1-2% per month. If no power is left, do not charge or use without permission; contact your installer.
• Follow storage instructions and Table 1-1 for storage temperature to optimize battery lifespan. Failures due to not following instructions are not covered by warranty.

Installation and Configuration

5.1 Installation Preparation

5.1.1 Safety Requirements

Only trained personnel with a comprehensive understanding of the power system should install the equipment. Follow safety regulations defined by local authorities and the requirements listed below. Before installing or removing the battery, ensure the system is disconnected from any power source and the battery system is turned off. Handle distribution cabling carefully with protective measures to avoid safety hazards during maintenance and operation.

5.1.2 Checking the Operation Environment

The operation environment must comply with Chapter 3 requirements. Adjustments must be made if necessary.

5.1.3 Tools

Tools that may be used are shown in Table 5-1:

5.1.4 Technical Preparation

• Electrical Interface Settings: If connecting directly to an energy storage inverter or DC charger, verify that the operating voltage, current, and power align with the battery parameters in "Table 1-1 Battery Pack Specifications".
• Safety Inspection: Fire-fighting equipment (e.g., dry powder fire extinguishers) must be present. Dangerous substances like flammable or explosive materials must not be stored nearby.

5.2 Unpacking

When the battery arrives, unload and store it properly, protected from sunlight and rain. Before installation, check for missing components against section 1.1 and ensure the box is intact. Handle unpacking carefully to preserve insulation. Contact PYTES for any damage or missing items.

5.3 Installation

5.3.1 Install the Battery

The V series can be installed vertically or horizontally. These instructions are for horizontal installation; vertical installation is similar. Ensure all equipment is placed steadily after installation.

5.3.2 Connect Ground Cable

Loosen the grounding screw on the front panel, attach the ground cable lug, tighten the screw, and connect the other end to a reliable grounding point. The ground cable diameter must be ≥ 6mm² / 12kcmil. Grounding resistance should be less than 0.1Ω.

5.3.3 Connecting the Power Cable

Before connecting, identify positive and negative terminals, mark them, and check for short-circuit or reverse connection. Select the correct cable based on loads using the table below:

Select suitable power cable for maximum circuit current. Contact your installer for advice.

Power cable connection instructions:

• Single-Rack: Connect positive and negative terminals of the battery to the inverter's battery port with power cables.
• Multiple Batteries (Max 14): Connect batteries in parallel using flexible busbars (up to three batteries without extra accessories). Connect inverter to one battery. A busbar or junction box is needed for convergence for more than 14 batteries. Warning: Connecting batteries in series is forbidden due to high voltage risk.

[Diagram Description: Figure 5-1 shows schematic diagrams of power cable connections for single and multiple rack setups, illustrating parallel connections via busbars.]

Note: When connecting multiple batteries in parallel, ensure cables have the same length, thickness, material, and resistance to minimize circular current influence.

• Multi-Rack: Connect overall power cables of each rack to a convergence bus bar (or junction box) in parallel, then connect to the energy storage inverter.

5.3.4 Connecting Communication Cables

• Single-Rack: Select the correct port (RS485/CAN) based on the communication protocol with the inverter and insert the communication cable.
• Multiple Batteries (Max 14): Communication is cascaded (master/slave). Insert communication cables into relevant link ports between batteries. Keep master Port 0 free and the end slave Port 1 free.

[Diagram Description: Figure 5-2 shows a schematic diagram of communication cable connections for cascade setup between batteries, illustrating port connections.]

• Multi-Rack: Connect the master battery of each rack to a hub with a standard communication cable. A hub is required for communication between the inverter and batteries (for more than 14 batteries or multiple racks).

Note: The system may not communicate if instructions are not followed.

5.3.5 WIFI Connection

A WiFi port is available for data collection and upload to the monitoring cloud platform, supporting remote viewing and firmware upgrades. This can be purchased separately from authorized PYTES resellers/distributors/installers.

[Diagram Description: A diagram illustrates the WiFi connection process: Insert WiFi stick into LoT Port on the battery, create an account on the cloud platform and bind the WiFi stick, then pair the WiFi stick with a wireless network.]

Procedure of Starting/Shutting Down the Whole System

Ensure all batteries are powered on before running the inverter to avoid shock from the inverter's in-rush current.

Power on Procedure

1. Turn on all power buttons.
2. Press the master battery SW button for one second.

Ensure all batteries are activated before turning on the inverter to prevent shock from large capacitor in-rush current.

Shut down Procedure

1. Press and hold the SW button of the master battery for three seconds.
2. Turn off all power buttons.

Wait for all battery lights to go out before turning off the power buttons.

Note: Batteries must be placed in a locked cabinet or room with a 25mm/1inch horizontal gap for ventilation. The battery cabinet must support the total weight of the batteries and accessories.

---End of installation---

Communication

The battery features RS-232C, RS-485, and CAN communication ports for obtaining battery status.

• CAN: The CAN communication terminal (RJ45 port) follows CAN protocol for outputting battery information.
• RS485: The RS485 communication terminal (RJ45 port) follows RS485 protocol for outputting battery information.
• RS232: The RS232 communication terminal (RJ45 port) follows RS232 protocol for software upgrade and PC communication.
• Link Port 0,1: Communication terminals (RJ45 ports) follow CAN/RS485 protocol for cascade communication between multiple parallel batteries.
• LoT Port: 4 Pin Circular Connector for connecting with WiFi sticks.

RS232 Port

Default baud rate of RS-232C ports: 115200bps.

Table 6-1 RS232 Connector Pin Assignments

RS485 Port and CAN Port

Default baud rate of RS-485 port: 9600bps. Default baud rate of CAN port: 500K.

Table 6-2 RS485 and CAN Connector Pin Assignments

Troubleshooting

Please refer to the troubleshooting methods below. Read "Table 7-1 LED indication" before troubleshooting to avoid false operations. Blinking or constant red ALM light does not necessarily indicate a fault; it often signifies normal operation. "Protection" status will resume normal operation once released.

Table 7-1 LED Indications

Note on blinking descriptions: Blink 1: 0.3s on/3.7s off; Blink 2: 0.5s on /0.5s off; Blink 3: 0.5s on / 1.5s off; Blink 4: 0.7s on / 9.3s off.

7.1 Unable to start

7.2 Unable to charge

7.3 Unable to discharge

7.4 ALM indicator (alarm) constantly on

When the ALM indicator is constantly red and other indicators are off, the battery is in "Protection" state. It will return to normal operation once the condition is released. Immediate measures may be required for some issues.

Warning: Do not repair the battery without authorization from Pytes!

Warranty Card

This section provides fields for customer information (Contact Name, Phone Number, Address, Email), product information (Battery Model, Battery Quantity, Purchase Date, Serial Number, Inverter Brand/Model, Inverter Quantity, Inverter Using Time, on/off Grid), installer information (Installer Name, Installation Date), problem description, photos of battery wiring, and photos of inverter wiring and panels.

Company Information

Shanghai PYTES Energy Co., LTD.
Add: No.3492 Jinqian Road, Fengxian District, Shanghai, China
Tel: 021-57475852
Email: ess_support@pytesgroup.com

The right of interpretation belongs to Pytes Energy.