Tewaycell 20KWH 400AH Powerwall All-in-One System User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Tewaycell 20KWH 400AH Powerwall All-in-One System. This integrated energy storage solution features a LiFePO4 battery, a built-in Battery Management System (BMS), an MPPT solar charge controller, and a 10KW output inverter, designed for household energy storage applications.

2. Safety Information

WARNING: Failure to follow these safety instructions may result in fire, electric shock, or other injury or damage.

• Disclaimer: KEEP OUT OF REACH OF CHILDREN. In case of ingestion, seek medical attention immediately.
• Always ensure the battery cell temperature is within the specified operating range. Stop charging if the temperature exceeds the absolute charging temperature.
• Before packaging or connecting, carefully check the orientation of the positive and negative terminals.
• When connecting terminals or wires to the battery module, ensure proper insulation to prevent short circuits.
• For long-term storage, keep the battery in a cool, dry place (< 35°C, 30%~50% State of Charge). Charge and discharge the unit once every 3 months.
• Do not expose the battery to direct sunlight or any heat source.
• Avoid wearing metal jewelry (e.g., rings, watches) when handling the battery unit to prevent accidental short circuits.

Critical Warnings:

• Do not charge beyond the maximum charging rate.
• Do not disassemble or modify the battery system.
• Do not throw or hit the battery.
• Do not pierce the battery with sharp objects (e.g., nails, knives, pens, electric drills).
• Do not mix with other types of batteries or modular units.
• Do not excessively squeeze the battery during use.
• Do not place the battery in a high temperature greater than 60°C.
• Do not use conductive materials to connect the positive and negative terminals (e.g., metals, wires).

Fire Extinguishing Function:

The battery system is equipped with an aerosol fire extinguishing device. In the event of a short circuit leading to fire, this device can detect the temperature and automatically activate to extinguish the fire.

Figure 2.1: Aerosol Fire Extinguishing Device Diagram

Figure 2.2: Internal View of Fire Extinguishing Device

3. Product Overview

The Tewaycell Powerwall is an advanced all-in-one energy storage solution designed for reliability and efficiency. It integrates a high-capacity LiFePO4 battery with a smart Battery Management System (BMS), a Maximum Power Point Tracking (MPPT) solar charge controller, and a powerful 10KW inverter.

Figure 3.1: Tewaycell Powerwall System

Key Features:

• Energy Capacity: 20KWH
• Battery Capacity: 400AH
• Voltage: 51.2V
• Cycle Life: 6000+ cycles at 80% Depth of Discharge (DOD)
• Integrated Systems: Built-in Smart BMS, MPPT Solar Charge Controller, 10KW Output Inverter
• Communication: CAN / RS485 interfaces

Dimensions:

Figure 3.2: Product Dimensions (L*H*W): 900×600×470 mm

Application Diagram:

Figure 3.3: Typical Application Scenario

BMS Details:

The integrated Smart BMS ensures optimal battery performance and longevity with comprehensive protection features.

Figure 3.4: Built-in BMS Features

• Battery Type: Brand New Grade A LiFePO4 Batteries
• Housing: Stainless Steel
• Protections: Over Charge, Over Discharge, Temperature Monitoring (NTC), Automatic Battery Balancing, Current Protection
• Monitoring: Power Display

4. Specifications

The Tewaycell Powerwall is available in EU and US/CA versions with specific electrical parameters.

Battery Cell Data:

For detailed performance characteristics of the LiFePO4 battery cells, refer to the following charts:

Figure 4.1: Battery Cell Performance Data

5. Installation and Setup

5.1 Packaging List

Verify that all components are present in the package before beginning installation:

Figure 5.1: Product Packaging List

5.2 System Connections

The Powerwall system offers various communication and power interfaces for integration with your home electrical system and solar array.

Figure 5.2: Inverter and Battery Communication Interfaces

Ensure all connections are secure and properly insulated. Pay close attention to the polarity of all terminals (positive and negative) to prevent damage to the system or connected devices.

5.3 Wiring Diagram (Example for 3-Phase Circuit)

For multi-inverter setups, follow the appropriate wiring diagrams. Below is an example for a 3-phase circuit configuration:

Figure 5.3: Example 3-Phase Circuit Wiring Diagram

Note: This cable needs to support 300A current for the illustrated 3-phase setup.

5.4 Inverter Compatibility

The Tewaycell Powerwall is compatible with a wide range of communicable inverters. Refer to the list below for compatible brands:

Figure 5.4: Communicable Inverters Brand List

6. Operation

Once installed, the Tewaycell Powerwall system can be monitored and controlled via its integrated display and communication interfaces.

6.1 Monitoring Data

The system provides detailed monitoring data, allowing users to track performance, configure settings, and identify any alarms or faults.

Figure 6.1: System Monitoring Data Interface

The monitoring interface typically displays:

• Real-time battery voltage, current, and State of Charge (SOC).
• Inverter input/output parameters.
• System configuration options.
• Fault and alarm status.

6.2 Communication Interfaces

The system supports various communication protocols for integration with external monitoring systems or computers:

• Inverter: RS485, CAN, USB, Dry contact
• Battery: RS485, CAN, RS232
• Optional Modules: Wi-Fi / GPRS for remote monitoring.

7. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Tewaycell Powerwall system.

• Cleaning: Periodically clean the exterior of the unit to prevent dust buildup, which can affect cooling. Ensure ventilation openings are clear.
• Inspection: Regularly inspect all cables and connections for signs of wear, damage, or loose connections. Address any issues promptly.
• Storage: If the system is to be stored for an extended period, ensure it is in a cool, dry environment (< 35°C) with a 30%~50% State of Charge (SOC). Charge and discharge the unit once every 3 months to maintain battery health.
• Software Updates: Check for any available firmware or software updates for the inverter and BMS to ensure the system operates with the latest features and improvements.

8. Troubleshooting

This section provides guidance on common issues. For complex problems, contact technical support.

• No Power Output: Check AC input, DC battery connections, and inverter status on the display. Verify circuit breakers are not tripped.
• Battery Not Charging: Ensure solar panels are connected correctly and receiving sunlight. Check MPPT controller status and PV input voltage range. Verify AC charging input if applicable.
• System Alarms/Faults: Refer to the system monitoring interface (Figure 6.1) for specific fault codes or alarm messages. These messages will guide you to the nature of the problem.
• Communication Issues: Verify physical connections for RS485, CAN, USB, or Wi-Fi/GPRS modules. Check communication settings in the system configuration.

If troubleshooting steps do not resolve the issue, record any error messages or symptoms and contact Tewaycell support.

9. User Tips

• External Display Integration: Utilize the available communication interfaces (RS485, CAN, USB, or optional Wi-Fi/GPRS modules) to connect to an external display or monitoring system. This allows for convenient remote monitoring of system performance, battery status, and energy flow.
• Optimize Solar Input: Ensure your solar panels are clean and optimally angled for maximum sunlight exposure to maximize charging efficiency.
• Load Management: Monitor your household energy consumption through the system's display to understand peak usage times and manage loads effectively, especially during periods of low solar generation or grid outages.

10. Warranty and Support

Warranty:

The Tewaycell 20KWH 400AH Powerwall All-in-One System comes with a 5-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use and service conditions.

Technical Support:

For technical assistance, troubleshooting, or warranty claims, please contact Tewaycell customer support. When contacting support, please have your model number (TW-AO-MB-51400-10KW) and any relevant monitoring data or error messages ready.

Communication interfaces (RS485, CAN, USB, RS232) can be used for advanced diagnostics by qualified technicians.