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BigBattery NEXUS 14.3kWh 48V LiFePO4 Battery

BigBattery NEXUS 14.3kWh 48V LiFePO4 Battery

BY: Big Battery | SKU: F-NXUS-48143-G1 Availability: In Stock
$3,999.00
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BigBattery NEXUS 14.3kWh 48V LiFePO4 Battery

Power your off-grid or backup system with confidence using the BigBattery NEXUS 14.3 kWh 48 V LiFePO₄ Battery — a rugged, high-capacity storage solution engineered for homes, cabins, and commercial energy systems. Featuring advanced LiFePO₄ chemistry, smart thermal management, and modular scalability up to 215 kWh, NEXUS delivers safe, long-lasting, and intelligent energy independence.

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BigBattery NEXUS 14.3 kWh 48 V LiFePO₄ Battery Features

High-Performance Power - With 280 Ah capacity, 100 A continuous discharge, and 110 A peak, the NEXUS handles demanding off-grid or backup loads easily. Its integrated thermal system allows operation from -4 °F to 113 °F — reliable in any climate.

Smart Integration - The NEXUS communicates via RS485, CAN, and RJ45, ensuring seamless pairing with hybrid inverters, including Sol-Ark and other high-voltage systems. It supports parallel expansion up to 15 units for massive 215 kWh total capacity.

Advanced Safety - A fully enclosed IP65-rated chassis, LiFePO₄ chemistry, and integrated BMS with auto-balancing and fire suppression deliver unmatched protection and longevity.

User-Friendly Monitoring - Monitor system status at a glance with its interactive LED display and communication protocols for real-time data on voltage, temperature, and performance.

Flexible Installation - The NEXUS can be floor-standing or wall-mounted, indoor or outdoor, and stackable for easy DIY or professional installation.

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BigBattery NEXUS 14.3 kWh 48 V LiFePO₄ Battery Applications

  • Off-grid solar homes and cabins – Dependable power for remote locations without grid access.
  • Backup power for residential and commercial systems – Ensures seamless energy supply during outages.
  • Expandable energy storage – Modular design grows with your energy needs.
  • Hybrid solar and EV charging systems – Compatible with hybrid inverters and high-load applications.
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What's Included

Everything you need is included with your product.

  • BigBattery NEXUS 14.3kWh 48V LiFePO4 Battery
  • User Manual
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Warranty

  • BigBattery 12-Year Limited Warranty

BigBattery NEXUS 14.3 kWh 48 V LiFePO₄ Battery Specifications

Category Specifications
Battery Specifications NEXUS 14.3KWh
SKU F-NXUS-48143-G1
System Voltage 48V
Nominal Voltage 51.2V
Chemistry LiFePO4
Usable Energy (kWh) 14.3kWh
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
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Frequently-Asked Questions

Can the NEXUS be used for off-grid and grid-tied systems?

Yes. It integrates seamlessly with most hybrid inverters to support both off-grid and grid-interactive applications.

Is it compatible with existing BigBattery systems?

Yes. The NEXUS is parallel-able with KONG and GRIZ series models purchased between 2019 and 2024.

How many batteries can I connect together?

Up to 15 units in parallel, offering a maximum total storage of 215 kWh.

Is professional installation required?

No – the NEXUS features a modular, mountable design that’s DIY-friendly, though professional installation is recommended for larger systems.