GokWh 48V LiFePO4 Battery Pack User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation of your GokWh 48V LiFePO4 Battery Pack. Designed for robust performance, this battery pack is suitable for a wide range of applications including home energy systems, RVs, campers, electric vehicles (EVs), boats, yachts, golf carts, and forklifts. It features a built-in Smart Battery Management System (BMS), Grade A prismatic LiFePO4 cells, and a high cycle life for long-term reliability.

2. Safety Information

⚠️ Disclaimer: Please be aware of potential fire risks and strictly adhere to the instruction manual for charging, storage, and disposal. For proper disposal, consult your local authority's guidelines for lithium-ion batteries.

• Always handle the battery pack with care. Avoid dropping or subjecting it to severe impacts.
• Do not disassemble, puncture, or modify the battery pack.
• Ensure proper ventilation during charging and discharging.
• Keep the battery away from heat sources, open flames, and flammable materials.
• Use only compatible chargers and inverters as specified in this manual.
• Do not short-circuit the battery terminals.
• In case of fire, use a Class D fire extinguisher or sand. Do not use water.
• Keep out of reach of children and pets.

3. Product Overview and Features

The GokWh 48V LiFePO4 Battery Pack is engineered for high performance and durability, offering a reliable energy storage solution. Key features include:

• Integrated PCBA Solution for optimized performance.
• Grade A Prismatic LiFePO4 Battery cells.
• Smart Inverter BMS (Battery Management System) for comprehensive protection.
• 4.3 Inch Touch LCD Screen for real-time monitoring.
• Compatibility with leading inverter brands.
• Supports up to 16 units in parallel connection (series connection is not supported for standard models).
• Multiple built-in protection mechanisms.
• Stack-Mounted Portable Design for flexible installation.

External Components

• P+/P- Surlok Plus Connector: IP67 waterproof, quick lock, and press-to-release design for parallel battery connections.
• 4.3 Inch Touch LCD Display: Provides real-time information about the battery pack's status.
• Communication Port: CAN and RS485 communication suitable for wide inverter compatibility.
• ADS Switch & Digital Output Port: Used for setting up address and communication protocols.
• Capacity Light: LED indicators to show the current capacity status of the battery pack.
• ON/OFF Switch & Grounding Port: Provides multiple layers of protection and control.

Internal Structure

The battery pack's robust internal design includes:

• PCB for Data Collecting
• Aluminum & Copper Bus Bars
• Compress Brackets
• EVA Foam Tape
• 3.2V LiFePO4 Cells
• 48V 200A BMS
• Epoxy Sheet
• Battery Terminals
• BMS Wire
• Compress Plate
• 400A Fuse

4. Specifications

Common Parameters

Model Specific Parameters

48V 100AH Model

48V 200AH Model

48V 280AH Model

48V 340AH Model

5. Setup and Installation

Parallel Connection

The GokWh 48V LiFePO4 Battery Pack supports parallel connection for increased capacity. It can connect up to 16 units in parallel. Series connection is NOT supported for these models.

For successful parallel connection, ensure the following:

• All batteries must be of the same type (Voltage & Capacity & BMS).
• All batteries must be from the same brand.
• Ideally, all batteries should be from a recent purchase (within 1-3 months) to ensure similar internal resistance and state of health.

System Integration (Home Energy System Example)

The battery pack can be integrated into a solar energy system, connecting to an MPPT charge controller and an inverter. Ensure all connections are secure and follow local electrical codes.

Inverter Compatibility

The BMS has built-in CANBUS protocol for matching various inverter brands. Compatible brands include:

• Pylontech
• Goodwe
• Growatt
• SMA
• Victron
• MUST
• DEYE
• SRNE
• SOFAR
• Voltronic
• Invent

If your inverter brand is not listed, please contact your inverter supplier for protocol definition and then contact customer service for assistance in confirming compatibility.

Physical Connections

• Connect the P+/P- Surlok Plus Connectors for parallel connections.
• Utilize the Communication Port (CAN and RS485) for inverter communication.
• Use the ADS Switch & Digital Output Port to configure communication addresses as needed.
• Ensure the Grounding Port is properly connected for safety.

6. Operation

Powering On/Off

Use the ON/OFF Switch located on the front panel to power the battery pack on or off. Ensure all connections are secure before powering on.

LCD Display and Monitoring

The 4.3-inch Touch LCD Display provides real-time information about the battery pack's status, including voltage, current, capacity (SOC), and temperature. It also shows the status of the active equalization function. The Capacity Light LEDs provide a quick visual indication of the battery's charge level.

Smart BMS Protection Features

The integrated Smart BMS provides comprehensive protection and management:

• Short Circuit Protection: Prevents damage from accidental short circuits.
• Voltage Protection: Safeguards against over-voltage and under-voltage conditions.
• Current Protection: Protects against over-current during charge and discharge.
• Capacity Protection: Manages battery capacity to prevent over-discharge.
• Temperature Protection: Monitors and protects against extreme temperatures during operation.
• Equalization Function: Actively balances cell voltages for optimal performance and longevity.

The BMS also supports application monitoring, allowing for detailed oversight of battery performance.

7. Maintenance

Proper maintenance ensures the longevity and optimal performance of your LiFePO4 battery pack.

• Temperature Management: Operate the battery within the specified charging temperature range of 0~50°C (32~122°F) and discharging temperature range of -20~60°C (-4~140°F). Extreme temperatures can degrade performance and shorten lifespan.
• Regular Inspection: Periodically check all connections for tightness and corrosion. Ensure the battery pack is clean and free from dust or debris.
• Storage: If storing the battery for an extended period, ensure it is charged to approximately 50% State of Charge (SOC) and stored in a cool, dry place within the recommended temperature range.
• Cycle Life: The battery is designed for a high cycle life (≥6000 to ≥8000 cycles), but consistent deep discharges or operating outside recommended parameters can reduce this.
• Firmware Updates: If available, keep the BMS firmware updated to ensure the latest features and optimizations.

8. Troubleshooting

The Smart BMS is designed to prevent most common issues by implementing various protection mechanisms. If you encounter any problems, consider the following:

• No Power/Display Off: Check the ON/OFF switch. Ensure all power cables are securely connected.
• BMS Protection Triggered: If the battery suddenly stops functioning, the BMS may have triggered a protection (e.g., over-voltage, under-voltage, over-current, over-temperature). Check the LCD display for error codes or warnings. Allow the battery to cool down if an over-temperature warning is present.
• Uneven Cell Voltages: The 2A Active Balancing feature should manage cell equalization. If significant discrepancies persist, contact support.
• Communication Issues: Verify the correct communication protocol (CAN/RS485) and address settings using the ADS Switch & Digital Output Port. Ensure the inverter is compatible.

For complex issues or if the problem persists, please contact customer service for further assistance.

9. User Tips

• Manual & Bluetooth Instructions: Upon receiving your battery, contact customer service to obtain the full user manual and Bluetooth pairing instructions, as a printed manual may not be included.
• Inverter Compatibility: Always verify your inverter model with the seller or customer service before purchasing to ensure proper matching and functionality.
• Parallel Connection Rules: When connecting multiple battery packs in parallel, ensure they are of the same type (voltage, capacity, BMS), from the same brand, and ideally purchased around the same time (within 1-3 months) for optimal performance and safety.
• No Series Connection: These 51.2V battery packs are designed for parallel connection only. Do NOT attempt to connect them in series.

10. Warranty and Support

The GokWh LiFePO4 Battery Pack is built with high-quality components and craftsmanship, designed for a long service life, typically around 10 years for the 100AH model, with a high cycle count of ≥6000 to ≥8000 cycles depending on the model and usage.

Shenzhen Jinglian Huiyi Electronic Commerce Co.,Ltd. is committed to providing superior quality products, competitive prices, first-class craftsmanship, safe packaging, and prompt delivery. Our after-sales service team strives to meet customers' needs sincerely.

For any questions, technical support, or warranty inquiries, please contact customer service. They can provide detailed user manuals, Bluetooth pairing instructions, and assistance with any operational or technical challenges you may encounter.