1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Tewaycell Powerwall LiFePO4 Battery Pack. This high-capacity battery system is designed for household energy storage (ESS) applications, featuring a built-in 200A Battery Management System (BMS), CAN/RS485 communication, and a 10KW output capability. Please read this manual thoroughly before using the product.
2. Safety Information
2.1 General Safety Precautions
- 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.
- Ensure correct polarity: Do not reverse the positive (+) and negative (-) terminals.
- Charge the battery only with a specified charger according to the charging requirements.
- Keep out of reach of children. In case of ingestion, seek medical attention immediately.
2.2 California Proposition 65 Warning
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
3. Product Overview
The Tewaycell Powerwall LiFePO4 Battery Pack is a robust and reliable energy storage solution. It features a durable stainless steel housing and is equipped with anti-skid wheels and a concave handle for ease of movement and positioning. The front panel includes a battery menu display for real-time monitoring and control, along with essential switches and ports.
3.1 Built-in Battery Management System (BMS)
The integrated 200A BMS provides comprehensive protection for the battery, ensuring longevity and safety. Key protections include:
- Over Charge Protection
- Overdischarge Protection
- Temperature Monitoring (NTC)
- Automatic Battery Balancing
- Current Protection
- Power Display
4. Specifications
| Feature | TW-MB51400-200A-HWB (20KWh) | TW-MB51600-200A-HWB (30KWh) |
|---|---|---|
| Battery Type | LiFePO4 | |
| Cell & Format | 16S2P, TW 206Ah Grade A+ | 16S2P, 304Ah Grade A+ |
| Nominal Voltage | 51.2V | |
| Nominal Capacity | 400AH | 600AH |
| Nominal Energy | 20,480Wh | 30,720Wh |
| Cycle Life | 6000+ @0.2C, 25℃, 80% DOD | |
| Max. Continuous Output Power | 10000W (10KW) | |
| Max. Charge Voltage | 57.6V | |
| Discharge Cut-off Voltage | 43.2V | |
| Max. Continuous Charge Current | 200A | |
| Max. Continuous Discharge Current | 200A | |
| Max. Pulse Current | 400A (<1S) | |
| Charge Temperature | 0℃~55℃ | |
| Discharge Temperature | -20℃~60℃ | |
| Temperature Controlled Fire Extinguisher | Yes | |
| Active Balancer | Yes | |
| Net Weight | 208 Kg | 279 Kg |
| Gross Weight (Packing) | 226 Kg | 300 Kg |
| Dimensions (H*L*W) | 730*520*450mm | 730*520*700 mm |
| Communication Ports | RS485*3 / CAN / RS232 | |
| Shell Material | SPCC | |
| Dustproof and Waterproof Rating | IP55 | |
| Warranty | 10 years Life, 7 years Warranty AH | |
| Compatible Inverter Brands | Deye, Voltronic, EASUN, PowMr, Growatt, GOODWE, Victron, SRNE, AFORE, PYLONTECH, SOFAR, MUST, MEGAREVOk, YWT, SRD, STUDER, SMA, DIDU, GINLONG and other common protocol inverters. | |
5. Setup Instructions
5.1 Package Contents
Before installation, verify that all components are present:
- Tewaycell Powerwall LiFePO4 Battery Pack (20KWh or 30KWh)
- Fit screws for installation
- Parallel Power Cable (if applicable for multi-unit setup)
- Inverter Cable for RS485/CAN/RS232 communication
- Mechanical support (if included)
5.2 System Application Diagram
The Tewaycell Powerwall battery integrates into a comprehensive energy system, typically involving solar panels, a generator, or utility grid as power sources, and an inverter to manage power flow to household appliances.
5.3 Powerwall Connection Schematic
The battery system connects to a power inverter, which can draw power from solar panels, the utility grid, or a generator. The inverter then supplies power to your home and can be monitored via a Cube WiFi/4G module, internet, and the PVguarder APP/Web interface.
5.4 Parallel Connections
The Tewaycell Powerwall supports parallel connections for increased capacity and output. Up to 16 units can be connected in parallel. Ensure proper wiring and use the provided parallel power cables.
5.5 Multi-Battery and Inverter Setup Example
For larger systems, multiple batteries can be connected to multiple inverters via an air switch, ensuring balanced load distribution. Ensure all cables, especially those supporting high currents, are appropriately rated.
6. Operating Instructions
6.1 Power On/Off
Locate the power switch on the battery unit (refer to Figure 3) and toggle it to the 'ON' or 'OFF' position as required.
6.2 Battery Menu Display
The integrated battery menu display provides real-time information about the battery's status, including voltage, current, state of charge (SOC), and other critical parameters.
6.3 PC Monitoring and Parameter Setting
The battery system can be connected to a PC for advanced monitoring and parameter configuration using the provided communication cables (RS485/CAN/RS232) and software.
6.4 Charge and Discharge Characteristics
Understanding the battery's charge and discharge curves is crucial for optimizing performance and lifespan. The battery is designed for stable operation across a range of temperatures and discharge rates.
7. Maintenance
The Tewaycell Powerwall LiFePO4 Battery Pack is designed for minimal maintenance. However, adhering to the following guidelines will ensure optimal performance and longevity:
- Environmental Conditions: Operate and store the battery within the specified temperature ranges (Charge: 0℃~55℃, Discharge: -20℃~60℃). Avoid extreme heat or cold.
- Cleanliness: Keep the battery unit clean and free from dust and debris. The IP55 rating provides protection against dust and water splashes, but direct immersion should be avoided.
- Connections: Periodically check all cable connections to ensure they are secure and free from corrosion.
- Active Balancer: The built-in active balancer helps maintain cell voltage consistency, extending the battery's lifespan. No user intervention is typically required for this feature.
8. Troubleshooting
If you encounter any issues with your Tewaycell Powerwall battery, please refer to the following common concerns:
- Inverter Compatibility: Ensure your inverter is compatible with the battery's communication protocols (CAN, RS485). A list of compatible brands is provided in the specifications. If your inverter is not listed, or if you are using a Huawei inverter, specific BMS configurations or additional components might be required.
- Connection Issues: Double-check all wiring connections between the battery, inverter, and other system components. Incorrect polarity or loose connections can prevent proper operation.
- Battery Not Charging/Discharging: Verify that the power switch is in the 'ON' position and that the charging source (solar, utility, generator) and load are correctly connected and operational. Check the battery menu display or PC monitoring software for error codes or status indicators.
- Technical Problems: For any complex technical issues or if you require assistance with connections, please contact Tewaycell customer support.
9. User Tips
- Verify Inverter Protocol: Before purchasing or installing, confirm that your inverter's communication protocol (e.g., CAN, RS485) matches the battery's capabilities to ensure seamless integration.
- Seek Installation Assistance: If you are unsure about the wiring or connection diagrams, especially for complex multi-battery or multi-inverter setups, contact Tewaycell for technical assistance.
- Monitor Regularly: Utilize the battery's display menu or PC monitoring software to keep track of its performance and health. This can help identify potential issues early.
10. Warranty and Support
The Tewaycell Powerwall LiFePO4 Battery Pack comes with a 10-year life expectancy and a 7-year warranty on AH (Ampere-hour) capacity. For any technical problems, support, or warranty claims, please contact Tewaycell directly. Our support team is available 24 hours online to assist you.
