Dyness B4850 48V 50Ah LiFePO4 Battery Pack User Manual

1. Introduction

The Dyness B4850 is a high-performance 48V 50Ah LiFePO4 (Lithium Iron Phosphate) battery module designed for home energy storage systems. Featuring a smart Battery Management System (BMS) and a robust rack-mount design, it offers a reliable, safe, and efficient solution for various applications, including off-grid and hybrid mesh systems. This manual provides essential information for the safe and effective installation, operation, and maintenance of your Dyness B4850 battery module.

2. Specifications

The Dyness B4850 battery module offers the following technical specifications:

Figure 1: Dyness B4850 Lithium Battery Module with dimensions (480mm L x 360mm W x 90mm H).

Figure 2: Compatible Inverters and Application Modes (Spontaneous Self-Use, Load First).

3. Safety Information

Please read and understand all safety instructions before installing or operating the Dyness B4850 battery module. Failure to follow these instructions may result in electric shock, fire, serious injury, or death.

• **Qualified Personnel Only:** Installation and maintenance should only be performed by qualified and trained personnel.
• **Electrical Safety:** Always disconnect power before working on the battery system. Use insulated tools.
• **Ventilation:** Ensure adequate ventilation around the battery modules to prevent heat buildup.
• **Environmental Conditions:** The battery has an IP20 protection level, meaning it is protected against solid objects larger than 12.5mm but not against water. Install in a dry environment, away from direct sunlight, rain, and excessive dust.
• **Physical Damage:** Do not drop, puncture, or expose the battery to severe impact. Do not open the battery casing.
• **Fire Hazard:** Do not expose the battery to open flames or high temperatures. Do not short-circuit the terminals.
• **Chemical Exposure:** In case of electrolyte leakage, avoid contact with skin and eyes. If contact occurs, rinse immediately with plenty of water and seek medical attention.
• **Children and Pets:** Keep the battery system out of reach of children and pets.

4. Installation and Setup

The Dyness B4850 features a modular design for easy installation and scalability. It can be stacked with flexible brackets and supports parallel connection of up to 40 units.

4.1 Unpacking and Inspection

1. Carefully unpack the battery module and inspect for any signs of damage during transit.
2. Verify that all components listed in the packing list are present.

4.2 Mounting

• The B4850 is designed for 19-inch rack mounting or stacking with flexible brackets.
• Ensure the mounting location is stable, dry, well-ventilated, and can support the weight of the battery modules.
• Maintain adequate clearance around the modules for airflow and access.

4.3 Wiring Connections

Refer to the diagrams below for proper power and communication connections. Always ensure the battery module is OFF before making any connections.

Figure 3: Front Panel Layout - ON/OFF switch, Power Terminals (+/-), ADD switches, Status Indicators (SOC, ALM, RUN), CAN/RS485 Ports (IN/OUT), DRY CONTACT ports.

Figure 4: Parallel Wiring Diagram for multiple B4850 modules, showing power and communication cable connections.

1. **Power Cables:** Connect the positive (+) and negative (-) terminals of each battery module to the inverter or busbar using appropriate gauge cables. Ensure correct polarity.
2. **Communication Cables:** Connect the CAN/RS485 IN/OUT ports between modules and to the inverter for proper communication and synchronized operation.
3. **Grounding:** Ensure the battery system is properly grounded according to local electrical codes.
4. **ADD Switches:** Configure the ADD switches on each module as per the system requirements and the inverter's manual for proper addressing in a multi-module setup.

4.4 Initial Power-Up

1. After all connections are secure, switch on the ON/OFF button on each battery module.
2. Observe the SOC, ALM, and RUN indicators for normal operation.
3. Follow the inverter's instructions for initial system startup and configuration.

Figure 5: Example application scenario showing multiple B4850 battery modules integrated into a home energy system with inverters.

5. Operation

The Dyness B4850 battery module operates as part of a larger energy storage system, typically managed by a compatible inverter. The smart BMS ensures optimal performance and safety.

5.1 Status Indicators

• **SOC (State of Charge):** Indicates the current charge level of the battery.
• **ALM (Alarm):** Illuminates to indicate a fault or warning condition. Refer to the inverter or system monitoring for details.
• **RUN:** Indicates the battery is operating normally.

5.2 Application Modes

The battery system can be configured to operate in different modes depending on your energy needs and inverter capabilities:

• **Spontaneous Self-Use Mode:** Energy produced by the PV system is primarily used to optimize self-consumption. Excess energy charges the batteries, then exported to the grid.
• **Load First Mode:** When there is no PV generation, and the battery has sufficient charge, it supplies power to the load in conjunction with grid power.

6. Maintenance

The Dyness B4850 LiFePO4 battery modules are designed for minimal maintenance. However, regular checks can ensure optimal performance and longevity.

• **Visual Inspection:** Periodically inspect the battery modules for any signs of physical damage, corrosion on terminals, or loose connections.
• **Cleaning:** Keep the battery modules clean and free from dust. Use a dry, soft cloth for cleaning. Do not use solvents or abrasive cleaners.
• **Ventilation:** Ensure that the ventilation openings are not blocked and that there is sufficient airflow around the modules.
• **Firmware Updates:** Check with your inverter manufacturer or Dyness for any recommended firmware updates for the battery or inverter to ensure compatibility and optimal performance.
• **Professional Check:** It is recommended to have a qualified technician perform a comprehensive system check annually.

7. Troubleshooting

If you encounter issues with your Dyness B4850 battery module, refer to the following basic troubleshooting steps. For complex issues, contact qualified service personnel.

• **Battery Not Powering On:**
  • Check if the ON/OFF switch on the front panel is in the 'ON' position.
  • Verify all power cable connections are secure and correctly polarized.
  • Ensure the inverter is powered on and communicating with the battery.
• **ALM Indicator On:**
  • An illuminated ALM indicator signifies a fault or warning. Consult your inverter's display or monitoring system for specific error codes or messages.
  • Common alarms include over-voltage, under-voltage, over-current, over-temperature, or communication errors.
  • If the alarm persists after addressing potential causes (e.g., environmental conditions, load), power down the system and contact support.
• **No Communication with Inverter:**
  • Check the CAN/RS485 communication cable connections between the battery modules and the inverter.
  • Verify the ADD switch settings on each battery module are correctly configured for the system.
  • Ensure the inverter's communication settings match the battery's protocol.
• **Reduced Performance/Capacity:**
  • Ensure the battery is operating within its specified temperature range.
  • Check for any error messages from the inverter or battery monitoring system.
  • Verify that the battery is receiving adequate charge from the PV system or grid.

8. User Tips

• **Modular System:** Remember that the Dyness B4850 is a single battery module. For larger energy storage needs, you will need to purchase and connect multiple modules in parallel, up to a maximum of 40 units. The price typically refers to a single module.
• **Inverter Compatibility:** Always confirm that your inverter is compatible with the Dyness B4850 battery module. Refer to the list of compatible inverters provided in the specifications section or consult your inverter's documentation.
• **Professional Installation:** Due to the electrical nature of the product, professional installation by a certified electrician or solar technician is highly recommended to ensure safety and proper system functionality.
• **Monitoring:** Utilize your inverter's monitoring capabilities to keep track of battery performance, State of Charge (SOC), and any potential alarms.

9. Warranty and Support

The Dyness B4850 LiFePO4 Battery Pack comes with a 10-year limited warranty, ensuring long-term reliability and peace of mind. The warranty is subject to specific terms and conditions, which can be obtained from your supplier.

9.1 Certifications

The Dyness B4850 battery module holds various international certifications, demonstrating its adherence to high safety and quality standards:

• UN38.3
• CE-EMC
• IEC 62619
• IEC 62040
• CEC Accredited
• CEI 0-21
• UL1973
• REACH
• ROHS
• UKCA
• GOST-R
• ISO 9001

Figure 6: Product Certifications and 10-Year Warranty Badge.

9.2 Technical Support

For technical assistance, warranty claims, or any questions not covered in this manual, please contact your authorized Dyness dealer or the seller directly. Provide your product model number and purchase date when seeking support.