Tewaycell 10KWH All-in-One Powerwall User Manual

1. Product Overview

The Tewaycell 10KWH All-in-One Powerwall is an integrated energy storage system designed for household and various backup power applications. It features a high-capacity 51.2V 200AH LiFePO4 battery, a built-in 10KW inverter, and advanced battery management system (BMS) with MPPT solar charge capabilities. This system offers reliable and efficient power conversion and storage.

Key Features:

• Battery Type: LiFePO4 (Lithium Iron Phosphate)
• Nominal Capacity: 200AH
• Battery Energy: 10240WH (10KWH)
• Voltage: 51.2V (Working Range: 44.8 ～ 57.6V)
• Rated Output Power: 10000W (10KW)
• Max. Charging & Discharging Current: 200A
• Cycle Life: >6000 Cycles @ 0.2C / 25℃ Charging / Discharging at 80%DOD, Until 80% Capacity.
• Built-in Smart BMS: Provides overcharge, overdischarge, temperature, and current protection, along with automatic battery balancing.
• Built-in MPPT Solar Charge Controller: Max. Peak Power 20000W, MPPT Voltage Range: 125-425Vdc.
• Communication Interfaces: RS485, CAN, USB, RS232, Dry contact.
• Fire Extinguishing Function: Equipped with an aerosol fire extinguishing device for automatic fire suppression in case of a short circuit.
• Application: Household energy storage, solar and wind power systems, RVs, caravans, backup systems, UPS.

2. Specifications

General Parameters

Figure 2: Physical dimensions of the Tewaycell Powerwall unit (660mm x 600mm x 470mm).

EU Version Specifics

• INVERTER OUTPUT: 230Vac (L1 / N / PE single-phase)
• AC INPUT: 90-270Vac, 50Hz ± 0.3Hz / 60Hz ± 0.3Hz
• Bypass Overload Current: 32A
• Operating Temperature Range: -15~55℃, >45℃ derated

US / CA Version Specifics

• INVERTER OUTPUT: 120 / 240Vac (L1 / L2 / N / PE split phase)
• AC INPUT: 90-140Vac, 50Hz ± 0.3Hz / 60Hz ± 0.3Hz
• Bypass Overload Current: 63A
• Operating Temperature Range: 5~131℉, >113℉ derated

Figure 3: Cell Data graphs including Charge Characteristics, Different Rate Discharge Curve, Different Temperature Discharge Curve, and Open Circuit Voltage vs SOC.

3. Setup and Installation

3.1 Unpacking and Inspection

Carefully unpack the Powerwall system. Verify all components listed in the packaging list are present and undamaged. If any items are missing or damaged, contact customer support immediately.

Figure 4: Packaging List detailing included items such as the all-in-one machine, communication cables, AC plug, photovoltaic connectors, and tools.

3.2 Site Selection

• The unit is rated IP20, meaning it is for indoor use only.
• Choose a cool, dry place, away from direct sunlight or heat sources.
• Ensure adequate ventilation around the unit to prevent overheating.
• The operating temperature range is -15~55℃ (EU) or 5~131℉ (US/CA).

3.3 Electrical Connections

All electrical connections should be performed by a qualified electrician in accordance with local electrical codes and regulations.

• Battery Connections: Ensure correct polarity when connecting terminals. Pay close attention to insulation to prevent short circuits.
• AC Input/Output: Connect the AC input from the grid and AC output to your household load.
• PV Input: Connect solar panels to the PV input terminals. The MPPT controller will manage solar charging.

Figure 5: Example 3-Phase circuit diagram showing connections for multiple 15KWH batteries and 5KW inverters, emphasizing the need for cables supporting 300A current.

3.4 Communication Connections

The Powerwall supports various communication interfaces for monitoring and control.

Figure 6: Detailed diagram of Inverter Communication Interfaces (RS485-1, USB-B, CAN/RS485-2, Parallel Connection Port, Dry Contact Port) and Battery Communication Interfaces (LED Indicator, RST, ADS, DCT, RS485/CAN, RS232, RS485/RS485).

• RS485 / CAN: For communication with compatible inverters and external monitoring systems.
• USB: For local data access or firmware updates.
• Dry Contact: For external control signals.
• RS232: For connecting to a computer for detailed monitoring and configuration.
• Optional Modules: Wi-Fi / GPRS modules can be added for remote monitoring.

4. Operating Instructions

4.1 Initial Power-Up

After all connections are securely made and verified, follow the system's specific power-up sequence, typically involving turning on the battery, then the inverter, and finally activating the AC output.

4.2 System Monitoring

The Powerwall system includes monitoring capabilities to track performance and status. This can be done via the integrated display, a connected computer, or optional Wi-Fi/GPRS modules for remote access.

Figure 7: Screenshots of the monitoring interface displaying real-time data, parameter settings, system configuration, and export options for battery and inverter performance.

4.3 Application Scenarios

Figure 8: Application diagram illustrating how the Powerwall integrates with solar panels (DC input), generators (AC input), the utility grid (AC input), and powers various household appliances (AC output).

• Household Energy Storage: Store excess solar energy or off-peak grid electricity for use during peak times or power outages.
• Backup Power: Provides seamless power supply during grid failures for essential loads.
• Off-Grid Systems: Can be integrated into solar and wind power systems for independent power generation.
• Mobile Applications: Suitable for RVs, caravans, and other mobile backup power needs.

5. Maintenance

5.1 General Care

• Keep the unit clean and free from dust.
• Ensure ventilation openings are not obstructed.
• Regularly check all cable connections for tightness and signs of wear.

5.2 Long-Term Storage

If the Powerwall is not in use for an extended period:

• Store the battery in a cool and dry place (< 35°C).
• Maintain a State of Charge (SOC) between 30% and 50%.
• Charge and discharge the battery once every 3 months to maintain health.

5.3 Fire Extinguishing Function

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

Figure 9: Internal view of the aerosol fire extinguishing device within the Powerwall.

Figure 10: Diagram illustrating the location and temperature-based activation mechanism of the fire extinguishing device.

6. Safety and Troubleshooting

6.1 Important Safety Warnings

• ⚠️ KEEP OUT OF REACH OF CHILDREN. In case of ingestion, seek medical attention immediately.
• Do not charge beyond the maximum charging rate.
• Do not disassemble or modify the battery.
• Do not throw or hit the battery.
• Do not pierce the battery with sharp objects (such as 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 (such as metals, wires).
• Do not wear metal jewelry (such as rings, watches, accessories, etc.) when handling the battery unit.

6.2 Troubleshooting Guide

This section provides general guidance for common issues. For complex problems, consult a qualified technician or Tewaycell customer support.

• No Power Output: Check all circuit breakers, AC input, and battery connections. Verify the system is powered on.
• Charging Issues: Ensure solar panels are receiving adequate sunlight and are correctly connected. Check PV operating voltage and MPPT range.
• System Alarms: Refer to the monitoring interface (Figure 7) for specific alarm codes and descriptions.
• Overheating: Ensure proper ventilation. Check ambient temperature. If the unit is derating due to high temperature, reduce load or improve cooling.

7. Warranty and Support

7.1 Product Warranty

The Tewaycell 10KWH All-in-One Powerwall 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. Please retain your proof of purchase for warranty claims.

7.2 Customer Support

For technical assistance, troubleshooting, or warranty inquiries, please contact Tewaycell customer support through your purchase platform or the official Tewaycell website. Provide your product model number and serial number for faster service.

8. User Tips

Based on general best practices for energy storage systems:

• Regular Monitoring: Periodically check the system's performance data to ensure optimal operation and identify any potential issues early.
• Software Updates: Keep the system's firmware updated to benefit from performance improvements and new features.
• Professional Installation: Always ensure installation is carried out by certified professionals to guarantee safety and compliance.