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