Tewaycell Powerwall LiFePO4 Battery Pack User Manual

1. Introduction

This manual provides comprehensive instructions for the safe and efficient use of your Tewaycell Powerwall LiFePO4 Battery Pack. Designed for robust household energy storage, this battery system offers reliable power with advanced features. Please read this manual thoroughly before installation and operation to ensure proper functionality and safety.

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.
Avoid using the battery in strong electrostatic and 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 the charging requirements.
Ensure correct connection between the inverter and MPPT. For technical issues, contact Tewaycell in time, 24 hours online.

2.2 California's 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

2.3 Disclaimer

⚠️KEEP OUT OF REACH OF CHILDREN
In case of ingestion seek medical attention immediately.

3. Product Overview

The Tewaycell Powerwall is a high-capacity LiFePO4 battery pack designed for robust household energy storage. It features a built-in 200A BMS, CAN/RS485 communication, and a 10KW output, ensuring efficient and safe power management.

3.1 Key Features

High Cycle Life: 6000+ cycles at 0.2C, 25℃, 80% DOD.
Advanced BMS: Built-in 200A Battery Management System for comprehensive protection.
Communication: Supports CAN and RS485 protocols for monitoring and integration.
High Output: Capable of 10KW continuous output.
Scalable: Supports up to 16 parallel connections for increased capacity.
Safety Features: Includes temperature-controlled fire extinguisher and active balancer.

3.2 Component Identification

Front view of Tewaycell Powerwall battery pack — Figure 3.1: Front view of the Tewaycell Powerwall battery pack, highlighting 20KWh, 6000+ Cycle, CAN/RS485, 200A BMS, Mobile Pack, 10KW Output, 400AH 51V LiFePO4.

Rear view of Tewaycell Powerwall battery — Figure 3.2: Rear view of the battery, showing power terminals (red and black), DC input, and control panel.

Detailed view of battery components and dimensions — Figure 3.3: Detailed view of the battery's communication ports (RS485, CAN, RS232), anti-skid wheels, battery menu display, switches & ports, and concave handle. Also shows dimensions: 780mm (H), 520mm (L), 460mm (W).

Built-in BMS features — Figure 3.4: Built-in BMS (Battery Management System) features including Over Charge Protection, Overdischarge Protection, Power Display, Temperature Monitoring NTC, Automatic Battery Balancing, and Current Protection.

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 (16S)
Nominal Capacity	400AH	600AH
Nominal Energy	20,480Wh	30,720Wh
Internal Resistance	≤100mΩ
Cycle Life	6000+ @0.2C, 25℃, 80% DOD
Self Discharge	≤3.5% (every month @25°C)
Max. Continuous Output Power	10000W (10KW)
Max. Charge Voltage	57.6V
Discharge Cut-off Voltage	43.2V
Max. Continuous Charge Current	200A
Standard Discharge Current	80A
Maximum Sustained Discharge Current	400A
Max. Pulse Current	600A (<30S)
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 (HLW)	730520450mm	730520700 mm
Communication Ports	RS4853 / CAN / RS232 (Includes RS4852 for parallel communication and RS232 for debug)
Adaptable Inverter List	Deye, Voltronic, EASUN, PowMr, Growatt, GOODWE, Victron, SRNE, AFORE, PYLONTECH, SOFAR, MUST, MEGAREVOk, YWT, SRD, STUDER, SMA, DIDU, GINLONG
Shell Material	SPCC
Dustproof and Waterproof Rating	IP55
Warranty	10 years Life, 7 years Warranty AH

4.1 Battery Test Curve Analysis

Battery test curve analysis graphs — Figure 4.1: Graphs showing Different Rate Discharge Curve @ 25°C, Different Temperature Discharge Curve @ 0.5C, 25°C, and Open circuit voltage VS SOC%. Includes text for Battery test curve analysis steps.

Battery Test Curve Analysis Steps:

Test mode: CC/CV
Data recording conditions: dT=10.000 sec. H/S:11.8/2.0.2.0 (ACDS-Newdata)
Test temperature: 25°C
Test process: (1) static, (2) CC/CV charging, (3) CC discharge, (4) static, (5) CC/CV charging, (6) static, (7) CC/CV charging, (8) static, (9) stop.
Discharge termination voltage: 2.5V
Charging voltage: 3.65V

4.2 Battery Charge and Discharge Curves

5. Setup

5.1 Package Contents

Package list for Tewaycell Powerwall — Figure 5.1: Package contents include the battery pack, screws, parallel power cable, and inverter cable for RS485/CAN/RS232 communication.

Detailed package list — Figure 5.2: Detailed view of the included accessories: fit screws, parallel power cable, and inverter cable for RS485/CAN/RS232. Mechanical support is also included.

5.2 Connection Diagram

The Tewaycell Powerwall can be integrated into various solar energy storage systems. Below are typical connection diagrams.

Application diagram for Tewaycell Powerwall — Figure 5.3: Application diagram showing the Tewaycell 20KWH Battery connected to solar panels, generator, utility grid, inverter, and various household appliances.

Figure 5.4: Schematic diagram of Powerwall connection, illustrating how solar panels, utility grid, and generator connect to a power inverter, which then connects to the battery and home appliances. Includes monitoring via PVguarder APP/Web.

5.3 Parallel Connections

For increased energy storage capacity, multiple Tewaycell Powerwall units can be connected in parallel. The system supports up to 16 parallel connections.

Parallel connection setup for multiple Powerwall units — Figure 5.5: Illustration showing up to 16 Tewaycell Powerwall units connected in parallel to a household system.

Wiring diagram for multiple batteries and inverters — Figure 5.6: Wiring diagram for connecting multiple 15KWH batteries with 5KW inverters, including an air switch. Note: The cable connecting the inverters needs to support 300A current.

6. Operation

6.1 Basic Operation

Ensure all connections are secure and correct before powering on the system.
Use the main power switch on the battery to turn the unit ON or OFF.
Monitor the battery status via the integrated battery menu display.

6.2 Monitoring via PC

The Tewaycell Powerwall supports PC monitoring via RS485/CAN/RS232 communication ports. This allows for detailed real-time data, multi-monitoring, parameter settings, and data export.

Figure 6.1: Screenshot of the PC monitoring interface for parameter settings, showing various voltage, current, temperature, and balance settings.

PC monitoring interface for real-time data — Figure 6.2: Screenshot of the PC monitoring interface for real-time monitoring, multi-monitoring info, and battery charge and discharge curves.

PC monitoring interface for historical data logs — Figure 6.3: Screenshot of the PC monitoring interface showing historical data logs for the battery.

7. Maintenance

Regularly check all cable connections for tightness and corrosion.
Keep the battery clean and free from dust and debris.
Ensure the battery operates within the specified charge (0℃~55℃) and discharge (-20℃~60℃) temperature ranges.
The built-in Active Balancer helps maintain cell voltage consistency, extending battery life.
The temperature-controlled fire extinguisher provides an additional layer of safety.

8. Troubleshooting

If you encounter any issues with your Tewaycell Powerwall, please refer to the following general guidelines. For complex problems, contact Tewaycell technical support.

No Power Output: Check all connections, ensure the main power switch is ON, and verify inverter status.
Charging Issues: Confirm the charger specifications match the battery requirements (Max. Charge Voltage 57.6V, Max. Continuous Charge Current 200A). Ensure the charge temperature is within 0℃~55℃.
Communication Problems: Verify RS485/CAN/RS232 cable connections and software settings on your PC.
BMS Protections: The built-in BMS provides protection against overcharge, overdischarge, overcurrent, and extreme temperatures. If the battery enters a protected state, it may temporarily cease operation. Refer to the PC monitoring interface for diagnostic information.
General Technical Problems: If you experience any technical difficulties, please contact Tewaycell support, available 24 hours online.

9. User Tips

Optimal Performance: For best performance and longevity, operate the battery within its recommended temperature ranges and avoid frequent deep discharges.
System Integration: When integrating with solar panels and inverters, ensure compatibility and proper sizing of components for maximum efficiency. Refer to the list of adaptable inverters in the specifications.
Regular Monitoring: Utilize the PC monitoring software to keep track of battery health, performance, and to adjust parameters as needed for your specific energy demands.

10. Warranty and Support

The Tewaycell Powerwall LiFePO4 Battery Pack comes with a 10-year life expectancy and a 7-year warranty on its AH capacity. For any warranty claims or technical support, please contact Tewaycell directly. Our support team is available 24 hours online to assist you with any technical problems.

10.1 Certifications

Product certifications — Figure 10.1: Various product certifications including CE and SGS, ensuring compliance with international standards.

11. Compliance

This product is designed and manufactured to meet relevant industry standards. Please adhere to all local regulations and safety guidelines during installation and operation.

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

⚠️Disclaimer: KEEP OUT OF REACH OF CHILDREN. In case of ingestion seek medical attention immediately.

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Tewaycell TW-MB51400-200A-HWB, TW-MB51600-200A-HWB