What Makes the 51.2V 150Ah 7kWh Rack Battery 4U Ideal for Energy Storage
The 51.2V 150Ah 7kWh Rack Battery 4U operates using lithium iron phosphate (LiFePO4) cells, providing stable energy storage in a compact 4U rack design. It integrates a battery management system (BMS) to regulate voltage, temperature, and current, ensuring safety and efficiency. Ideal for residential and commercial use, it supports scalable energy solutions through modular stacking. The BMS continuously monitors individual cell voltages, balancing energy distribution to prevent overcharging or undercharging. With 16 cells arranged in series, the battery maintains a stable 51.2V output even under heavy loads. Modular design allows users to connect up to 16 units in parallel, achieving 112kWh total capacity for large-scale applications. Built-in CAN and RS485 communication ports enable real-time data monitoring via inverters or energy management systems.
What Are the Key Specifications of the 51.2V 150Ah Rack Battery?
Key specs include a 51.2V nominal voltage, 150Ah capacity, and 7kWh energy storage. It weighs ~45kg, operates between -20°C to 55°C, and supports up to 16 units in parallel. With 95% depth of discharge (DoD) and 6,000+ cycles at 80% capacity retention, it’s built for long-term reliability and high performance in diverse environments. The battery’s charge efficiency exceeds 98%, minimizing energy loss during daily cycling. Its discharge rate of 0.5C (75A continuous) ensures compatibility with high-power inverters up to 10kW. The compact 482mm x 177mm x 450mm dimensions allow seamless integration into standard server racks. Advanced thermal management uses aluminum alloy housings and internal cooling channels to maintain optimal operating temperatures without active cooling systems.
| Parameter | Specification |
|---|---|
| Energy Density | 155 Wh/kg |
| Peak Power | 10kW (5 seconds) |
| Communication Protocols | CAN 2.0B, RS485, Dry Contact |
Where Can the 51.2V 7kWh Rack Battery Be Deployed?
This battery is suited for solar energy storage, UPS systems, off-grid setups, and telecom applications. Its 4U rack design allows seamless integration with inverters like Victron, SMA, and Growatt. Industrial facilities, data centers, and residential solar arrays benefit from its scalability and high energy density. For microgrid installations, multiple units can be configured as 48V/100V/400V systems using series-parallel connections. Telecom towers utilize these batteries for backup power during outages, with remote monitoring via integrated IoT gateways. Marine applications benefit from the vibration-resistant design and salt spray corrosion protection meeting IEC 60068-2-52 standards.
Why Choose LiFePO4 Chemistry for the 7kWh Rack Battery?
LiFePO4 offers thermal stability, non-toxic materials, and a lifespan exceeding lead-acid batteries by 5x. It resists thermal runaway, operates efficiently in extreme temperatures, and maintains consistent voltage output. These traits reduce fire risks and long-term costs, making it safer and more sustainable for critical applications. The olivine crystal structure prevents oxygen release during thermal stress, unlike NMC batteries. This chemistry enables partial state-of-charge (PSOC) cycling without capacity degradation, ideal for solar applications with daily charge/discharge cycles. Redway’s proprietary electrode coating technology enhances ionic conductivity, achieving 25% faster charge acceptance compared to standard LiFePO4 cells.
What Safety Features Are Built Into the Battery?
Safety mechanisms include overcharge/over-discharge protection, short-circuit prevention, and cell balancing via BMS. The enclosure is IP54-rated for dust/water resistance, and flame-retardant materials minimize fire hazards. Thermal sensors trigger shutdowns if temperatures exceed 60°C. The multi-layer protection system includes:
- Cell-level fuses interrupting current at 150A surges
- Self-resetting PTC thermistors for overcurrent protection
- Gas venting channels for emergency pressure release
UL1973-certified battery modules undergo rigorous testing including nail penetration, crush, and thermal runaway propagation tests. The BMS implements ISO 26262 ASIL-C functional safety standards, providing redundant protection circuits. Emergency disconnect terminals allow manual shutdown during maintenance.
“The 51.2V 150Ah rack battery represents a paradigm shift in scalable energy storage,” says Dr. Lin Wei, Redway’s Chief Engineer. “Its modularity allows users to start small and expand incrementally, which is cost-effective for businesses transitioning to renewables. Future iterations will prioritize bidirectional compatibility with EV charging infrastructure.”
FAQs
- Q: How long does the battery last on a single charge?
- A: At full 7kWh capacity, it can power a 1kW load for 7 hours. Runtime varies based on load size and efficiency losses.
- Q: Is the battery compatible with Tesla Powerwall inverters?
- A: No, it’s designed for third-party inverters like Victron and SMA. Adapters may be required for proprietary systems.
- Q: What warranty is offered?
- A: Redway provides a 10-year warranty, covering defects and capacity degradation below 70% within the period.