BigBattery 48V 15kWh NEXUS LiFePO4 Battery
Nexus is the most affordable 15kWh LiFePO₄ off-grid powerhouses with a portable, compact build, and scalability to 215kWh for unstoppable outdoor home or cabin backup power.
Key Features
- Performance: Uninterrupted, long-lasting power for any off-grid application.
- Chemistry: Advanced LiFePO4 for safety and longevity.
- Design: Rugged, floor-standing design for easy installation in tech closets, garages, cabins, or sheds.
- Protection: Integrated BMS with quadruple safety redundancies.
- Scalability: High-capacity, expandable storage solution up to 215kWh.
- Applications: Off-grid solar, commercial backup, and home EPS.
Sleek & Compact Design
Our stackable, compact design comes with all the hardware you need for a straightforward setup, letting you get your off-grid system up and running efficiently in less time. Engineered for reliability in any off-grid environment, it delivers consistent power when you need it most.
Off-Grid Energy Reliability
With 280 Ah of capacity, 100 A continuous discharge, and peak support up to 110 A, NEXUS handles high-demand loads with ease. NEXUS’s smart thermal management enables charging from 32 °F to 113 °F and discharging down to -4 °F, making it a true all-weather energy solution.
Modular ESS That Grows With You
NEXUS supports parallel expansion up to 15 units, offering 215kWh total capacity. With RS485, CAN, and RJ45 communication ports, it’s ready to integrate seamlessly into new or existing inverter systems—ensuring full system transparency, automation, and control.
Legacy Product Parallel Compatibility
What’s included:
51.2V 300AH-15KWH Energy storage box, with fire extinguisher (aerosol) & heater
| Battery Specifications | NEXUS 14.3KWh |
| SKU | F-NXUS-48143-G1 |
| System Voltage | 48V |
| Nominal Voltage | 51.2V |
| Chemistry | LiFePO4 |
| Usable Energy (kWh) | 15kWh |
| Ah Capacity | 280Ah |
| Cell Configuration | 16S1P |
| Max Continuous Discharge | 100A |
| Max Discharge Power | 7.6kW |
| Max Discharge Peak | 110A |
| Max Charge Current | 100A |
| Charging Voltage Range | 53.5V-57.6V |
| Operating Voltage Range | 48V-57.6V |
| Max Charge Voltage | 57.9V |
| Suggested Low Voltage Cutoff | 50.8V |
| Charge Temp Range | 0°C to 45°C |
| Discharge Temp Range | -20°C to 45°C |
| Optimal Discharge Temp | +15°C to +35°C |
| Storage Temp Range (SoC >50%) | -20°C~25°C |
| Humidity Range | 10%-95% (No Condensation) |
| Weight (kg) | ~142.8 kg ±5 |
| Dimensions (WxHxD) | 19.7 x 27.5 x 15.7 in (500×700×400 mm) |
| Altitude Limit | <2000m |
| Max Connections | 15 in parallel (up to 215.0kWh) |
| Communications | RS485 / RJ45 / CAN |
| Protection Rating | IP21 |
| Certifications | UN38.3 |
| Installation | Indoor Floor-standing |
| User Manual | Click Here |
| Spec Sheet | Click Here |
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