Tewaycell 48V 300Ah 15KWH Lithium Battery Pack Power Wall

1. Introduction

This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Tewaycell 48V 300Ah 15KWH Lithium Battery Pack Power Wall. This all-in-one energy storage system is designed for home solar applications, integrating PV power generation, intelligent power storage, and inverter functions into a single, compact unit. Please read this manual thoroughly before using the product.

2. Safety Information

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

• Always ensure the system is properly grounded before making any connections.
• Do not attempt to open or disassemble the battery pack or inverter unit. There are no user-serviceable parts inside.
• Keep the unit away from water, moisture, and flammable materials.
• Ensure adequate ventilation around the unit to prevent overheating.
• Only qualified personnel should perform electrical installations and maintenance.
• Wear appropriate personal protective equipment (PPE) when working with the system.
• In case of fire, use a Class D fire extinguisher (for lithium-ion batteries). Do not use water.

3. Product Features

The Tewaycell Power Wall is an advanced, integrated energy storage solution with the following key features:

• High Cycle Life: Over 6000 cycles with 80% Depth of Discharge (DOD).
• Integrated Design: All-in-one unit with built-in 5KW inverter and 15S 100A Battery Management System (BMS).
• High-Quality Battery Cells: Utilizes Grade A LiFePO4 battery cells, tested for sufficient capacity before installation.
• Space-Saving: Patented vertical structure design.
• High Usable Capacity: 95% DOD for maximum energy utilization.
• Easy Mobility: Equipped with rollers and handles for convenient movement.
• Advanced Communication: Supports CAN, RS485, and RS-232 communication protocols.
• Scalability: Supports parallel connection of up to 6 units for a maximum 30KW output.
• Robust Construction: Features laser welding for internal battery connections, reducing resistance and improving battery life.

Figure 1: Tewaycell Power Wall with key features.

Figure 2: Patented vertical structure for space-saving design.

Figure 3: Easy moving with rollers and handle.

Figure 4: Grade A LiFePO4 Battery Cells and Laser Welding.

4. Setup and Installation

Professional installation is highly recommended for this system. Ensure all local electrical codes and regulations are followed.

4.1 Unpacking and Placement

1. Carefully unpack the unit and inspect for any shipping damage.
2. Place the Power Wall on a flat, stable surface in a well-ventilated area, away from direct sunlight, heat sources, and moisture.
3. Utilize the integrated rollers and handles for easy positioning.

4.2 Electrical Connections

Refer to the connection panel on the top of the unit (Figure 5) for wiring.

Figure 5: Connection Panel Overview.

• PV Input: Connect your solar panel array to the PV+ and PV- terminals. Ensure correct polarity and voltage within the specified range (120V~500V).
• AC Input: Connect the grid AC power supply to the AC input port.
• AC Output: Connect your home's electrical load to the AC output port.
• Battery Port: This port is for internal battery connection and typically pre-wired. Do not alter unless instructed by a professional.
• Grounding: Ensure the unit is properly grounded according to local electrical codes.

4.3 Communication Connections

The unit supports RS485, CAN, and RS-232 communication. These ports are typically located on the side or rear of the unit (Figure 6).

Figure 6: RS485/CAN Communication Ports.

• Connect communication cables as required for monitoring or parallel operation.
• DIP switches (if present, as shown in video) may need to be configured for specific communication protocols or parallel settings. Consult a professional for correct configuration.

4.4 Parallel Connection (Optional)

The system supports parallel connection of up to 6 units to achieve a maximum output of 30KW. Refer to the parallel connection diagram (Figure 7) and consult a qualified electrician for proper setup.

Figure 7: Parallel Connection Diagram and Internal Components.

5. Operating Instructions

5.1 Initial Power-On

1. After all connections are securely made and verified, switch on the main circuit breaker for the system.
2. Turn on the individual switches on the unit's top panel (PV IN, AC IN, AC OUT, BAT) in the recommended order (e.g., BAT first, then PV IN, AC IN, AC OUT).
3. The LED displays will illuminate.

5.2 Display Operation

The unit features two LED displays: one for the Battery Controller (BMS) and one for the Inverter Controller (Figure 8).

Figure 8: External Displays and Controls.

Use the MENU, ENTER, DOWN, and ESC buttons to navigate through the display menus.

• Battery Controller Display: Shows battery parameters such as Pack Voltage (PackV), Current (Im), Temperature, and individual Cell Voltages.
• Inverter Controller Display: Shows inverter status, input/output voltage, current, load percentage, and charging status (AC/INV, CHARGE, FAULT indicators).

5.3 Working Modes

The inverter has a variety of working modes, allowing it to function as a main power supply in areas without electricity or as a backup power supply to handle sudden power failures. The system can respond flexibly to different energy needs.

6. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Power Wall.

• Visual Inspection: Periodically check all cables and connections for signs of wear, corrosion, or damage. Ensure they are tight and secure.
• Cleaning: Keep the unit clean and free from dust and debris. Use a dry, soft cloth. Do not use liquid cleaners.
• Ventilation: Ensure that the ventilation openings are not blocked to allow for proper airflow and prevent overheating.
• Environmental Conditions: Operate the unit within the specified temperature and humidity ranges (refer to specifications).
• Battery Health: The integrated BMS monitors battery health. If any warnings or fault codes appear, consult the troubleshooting section or contact support.

7. Troubleshooting

If you encounter issues with your Tewaycell Power Wall, refer to the following common problems and solutions:

• Unit Not Powering On:
  - Check all power switches (main breaker, unit switches) are in the ON position.
  - Verify AC input and battery connections.
• No AC Output:
  - Check the AC OUT switch.
  - Ensure the battery has sufficient charge.
  - Check for any fault indicators on the inverter display.
• Fault Indicator On:
  - Note the specific fault code or message displayed.
  - Common faults include over-voltage, under-voltage, over-current, or high temperature.
  - Turn off the unit, wait a few minutes, and restart. If the fault persists, contact technical support.
• Battery Not Charging:
  - Check PV input connections and ensure solar panels are receiving sunlight.
  - Verify AC input connection if charging from the grid.
  - Check the CHARGE indicator on the inverter display.

For complex issues or persistent problems, contact Tewaycell technical support.

8. Specifications

9. User Tips

• DIY Battery Pack: While the unit is an all-in-one solution, some users may consider customizing or expanding their battery setup. If you plan to build your own battery pack, ensure that the BMS and inverter are compatible and correctly configured to avoid damage and ensure safe operation. It is highly recommended to consult with a professional or the manufacturer for guidance on compatibility and wiring.
• System Scalability: Take advantage of the parallel support feature to expand your energy storage capacity as your needs grow. Plan your system layout and wiring carefully when adding more units.

10. Frequently Asked Questions (FAQ)

Q: Can I make up the battery pack by myself?

Re: Yes, you can DIY by yourself. If you worry about it not working with the BMS and inverter, we can provide you with them and make sure they can be matched.

11. Warranty and Support

For warranty information, technical support, or service requests, please contact your seller or the manufacturer directly. Ensure you have your product model number and purchase details available when contacting support.