1. Introduction
This manual provides essential information for the safe and efficient operation of your Tewaycell 15KWH LiFePO4 Battery Pack Powerwall. This high-capacity battery system is designed for household energy storage, offering reliable power with advanced features like a built-in Battery Management System (BMS), CAN/RS485 communication, and a long cycle life.
Image 1: Tewaycell 15KWH LiFePO4 Battery Pack Powerwall highlighting 15KWH capacity, 6000+ cycle life, CAN/RS485 communication, 200A BMS, mobile design, and 10KW output.
2. Safety Information
WARNING: Failure to follow these safety instructions may result in fire, electric shock, or other injury or damage.
- California's Proposition 65 Warning: This product contains Lithium carbonate, a chemical known to the State of California to cause developmental toxicity. For more information go to www.P65Warnings.ca.gov.
- KEEP OUT OF REACH OF CHILDREN. In case of ingestion, seek medical attention immediately.
- Do not immerse the battery in water or allow it to get wet.
- Do not use or store the battery where it is exposed to extremely high temperatures.
- Do not use the battery in strong electrostatic or magnetic fields, as this may compromise battery safety.
- Do not reverse the positive (+) and negative (-) terminals to prevent reverse connection.
- Charge the battery with a specified charger according to charging requirements.
- Ensure correct connection between the inverter and MPPT. For technical problems, contact Tewaycell support.
Image 2: Safety features including the fire protection device, and a detailed view of the battery's terminals, switches, and indicators.
3. Product Features
The Tewaycell Powerwall is engineered with advanced technology to provide a reliable and efficient energy storage solution:
- High Capacity: Available in 14.7KWh and 15.7KWh configurations with 300AH nominal capacity.
- Long Cycle Life: Over 6000 cycles at 0.2C, 25℃, 80% Depth of Discharge (DOD).
- Advanced BMS: Built-in Battery Management System for perfect battery protection, including over-charge, over-discharge, temperature monitoring (NTC), automatic battery balancing, and current protection.
- Communication: Supports CAN and RS485 communication protocols for seamless integration with various inverters and monitoring systems.
- Parallel Connection: Capable of supporting up to 16 parallel connections for increased capacity and power output.
- Fire Protection: Features a built-in temperature-controlled fire extinguisher that activates if the temperature reaches 180°C.
- Durable Construction: Housed in a stainless steel SPCC shell with an IP55 dustproof and waterproof rating.
- Active Balancer: Integrated active balancer for optimal cell performance and longevity.
Image 3: Built-in BMS features for comprehensive battery protection.
4. Setup Instructions
4.1 Unpacking and Inspection
Carefully unpack the battery system. The package includes:
- Tewaycell LiFePO4 Battery Pack
- Fit screws
- Parallel Power Cable
- Inverter Cable for RS485/CAN/RS232
Inspect all components for any signs of damage during transit. If any damage is found, contact Tewaycell support immediately.
Image 4: Contents of the packing list.
4.2 Physical Installation
- Placement: Position the battery pack in a dry, well-ventilated area, away from direct sunlight and extreme temperatures.
- Stability: Ensure the battery is placed on a stable, level surface. The unit includes wheels for easier positioning.
- Dimensions: The battery dimensions are approximately 900mm (Height, including wheels) x 520mm (Length) x 300mm (Width).
- Weight: Net weight is 131 Kg (for 48V 14.7KWh 100A model) or 137 Kg (for 51.2V 15.7KWh models). Ensure the installation location can support this weight.
4.3 Electrical Connection
Refer to the application and schematic diagrams for proper connection. Professional installation is recommended.
Image 5: Application Diagram for the Tewaycell Powerwall in a home energy system.
Image 6: Schematic Diagram of Powerwall Connection.
- Inverter Connection: Connect the battery to a compatible inverter. The system supports various inverter brands including GROWATT, Deye, GOODWE, VICTRON, SOFAR, SRNE, and VOLTRONIC POWER.
- Parallel Connections: For increased capacity, up to 16 battery units can be connected in parallel. Ensure proper cabling for high current loads (e.g., 300A for multiple 5KW inverters).
Image 7: Illustration of up to 16 parallel connections.
Image 8: Compatible Inverter Brands.
4.4 Initial Power-Up
- Ensure all connections are secure and correct.
- Locate the 'ON/OFF' power switch and the 'Active Balancer' switch on the battery unit.
- Turn on the 'Active Balancer' switch first, then the main 'ON/OFF' power switch.
Image 9: Detail of Air Switch and Active Balancer.
5. Operating Instructions
5.1 Basic Operation
- Power Switch: Controls the main power to the battery system.
- Active Balancer Switch: Activates the internal active balancing function for optimal cell health.
- Indicators: Monitor the LED indicators on the battery for status (e.g., power display, alarm indicators).
5.2 Monitoring and Communication
The Tewaycell Powerwall features CAN and RS485 communication ports for external monitoring and control. An RS232 port is available for PC connection.
- PC Monitoring: Connect the battery to a PC using the provided RS232 cable and compatible software to monitor real-time data, multi-monitoring information, and set parameters.
Image 10: PC monitoring software interface for real-time data and parameter settings.
- Remote Monitoring: The system can be integrated with a Power Inverter and a Cube WIFI/4G device to connect to the internet, allowing remote monitoring via the PVguarder APP or Web interface.
5.3 Parameter Setting
The PC monitoring software allows for detailed parameter adjustments. Consult the software's specific guide for advanced settings. Ensure you understand the implications of changing parameters before making adjustments.
6. Maintenance
- Regular Inspection: Periodically check all cables and connections for tightness and signs of wear or damage.
- Cleaning: Keep the battery unit clean and free from dust and debris. Use a dry cloth for cleaning. Do not use liquids.
- Temperature: Ensure the battery operates within its specified charge temperature range of 0℃ to 55℃ and discharge temperature range of -20℃ to 60℃.
- Storage: If storing the battery for an extended period, ensure it is charged to an appropriate level (e.g., 50% State of Charge) and stored in a cool, dry place.
7. Troubleshooting
This section provides basic troubleshooting steps. For complex issues, contact Tewaycell support.
- Battery Not Powering On:
- Check if the main power switch is ON.
- Ensure the active balancer switch is ON.
- Verify all power cables are securely connected. - No Output Power:
- Check the inverter status and connections.
- Verify battery charge level via indicators or monitoring software.
- Ensure no protection modes (e.g., over-discharge) are active. - Communication Issues:
- Check communication cables (RS485/CAN/RS232) for secure connection.
- Verify software settings and drivers on the PC. - Unusual Noises or Smells:
- Immediately disconnect the battery from all loads and charging sources.
- Contact Tewaycell support. Do not attempt to open the battery unit.
8. Specifications
The following table details the specifications for the Tewaycell LiFePO4 Battery Pack Powerwall models:
| Feature | 48.0V 14.7KWh 100A | 51.2V 15.7KWh 100A / 200A | |
|---|---|---|---|
| Model | TW-MB48300-100A-HWB | TW-MB51300-100A-HWB | TW-MB51300-200A-HWB |
| Battery type | LiFePO4 | ||
| Cell & Format | 15S1P, TW 306Ah Grade A+ | 16S1P, TW 306Ah Grade A+ | |
| Nominal Voltage | 48.0V | 51.2V | |
| Nominal Capacity | 306AH | ||
| Nominal Energy | 14,688Wh | 15,667Wh | |
| Cycle life | 6000+ @0.2C, 25℃, 80% DOD | ||
| Max. Continuous Output Power | 5KW | 10KW | |
| Max. Charge Voltage | 54.7V | 58.4V | |
| Discharge Cut-off Voltage | 40.5V | 43.2V | |
| Max. Continuous Charge Current | 100A | 200A | |
| Max. Continuous Discharge Current | 100A | 200A | |
| Max. Pulse Current | 200A(<1S) | 300A(<1S) | |
| Charge Temperature | 0℃~55℃ | ||
| Discharge Temperature | -20℃~60℃ | ||
| Temperature Controlled Fire Extinguisher | Yes | ||
| Active Balancer | Yes | ||
| Net weight | 131 Kg | 137 Kg | |
| Gross weight | 151 Kg | 157 Kg | |
| Dimensions (H*L*W) | 900(wheel included)*520*300 mm | ||
| Communication Ports | RS485/CAN | ||
| Parallel Communication Ports | RS485*2 (Right 1 & Right 2) | ||
| Connect to PC Port | RS232 | ||
| Adaptable inverter list | GROWATT, Deye, GOODWE, VICTRON, SOFAR, SRNE, VOLTRONIC POWER | ||
| Shell material | SPCC | ||
| Dustproof and waterproof rating | IP55 | ||
| Warranty | 10 years Life, 7 years Warranty AH | ||
Image 11: Detailed Product Specification Table.
9. User Tips
- Inverter Compatibility: While the battery is compatible with many inverter brands, always verify specific model compatibility with your chosen inverter to ensure optimal performance and communication.
- Professional Installation: Due to the high voltage and current involved, professional installation by a qualified electrician or solar technician is highly recommended to ensure safety and proper system functionality.
- Monitoring is Key: Utilize the PC monitoring software or remote app to keep track of battery health, charge/discharge cycles, and performance. This helps in proactive maintenance and troubleshooting.
- Parallel Connection Planning: If planning to connect multiple units in parallel, ensure your system's wiring and inverter can handle the increased current.
10. Warranty and Support
The Tewaycell LiFePO4 Battery Pack Powerwall comes with a 10-year life expectancy and a 7-year warranty (AH). For warranty claims, technical assistance, or any questions regarding your battery system, please contact Tewaycell customer support. They are available 24 hours online for assistance.
