Product Summary:
The BigBattery NEXUS™ 48V 15kWh LiFePO₄ Battery is a cost-effective, high-capacity energy storage solution designed for off-grid homes, cabins, and backup power systems. With a compact, portable, floor-standing design, NEXUS delivers reliable, uninterrupted power while allowing flexible installation in garages, utility rooms, cabins, or sheds-without complex mounting.
Powered by advanced LiFePO₄ battery chemistry, NEXUS offers long service life, enhanced safety, and consistent performance. Built with an integrated Battery Management System (BMS) featuring multiple layers of protection, it ensures dependable operation even in demanding environments.
Each unit includes a self-heating function for cold-weather performance and integrated aerosol fire suppression for added safety. Expandable up to 225kWh, NEXUS is ideal for off-grid solar systems, commercial backup power, and home emergency power applications where affordability, scalability, and reliability matter most.
Ships From: Texas, USA
Warranty: 12 Years
Support: Lifetime USA-Based Tech Support
Compatibility
Closed-Loop Communication with Inverters (Off Grid Non-UL 9540 Installs)
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All BigBattery APEX Inverters
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All EG4 Inverters
Power Flexibility:
- Supports off-grid installations
- Scalable energy storage for residential and commercial use
- Designed for scalable energy storage applications
Key Features
- 15kWh LiFePO₄ Battery Module – Safe, high-capacity lithium storage with long lifespan
- 6,000+ Cycle Life – Built for years of daily use and long-term savings
- Advanced BMS Protection – Multi-layer protection against voltage, current, and temperature risks
- Self-Heating Function – Reliable performance in cold climates
- Integrated Thermal Suppression – Built-in aerosol system for enhanced safety
- Modular Expansion – Scale from 15kWh up to 225kWh as needed
- Compact Floor-Standing Design – Easy placement without wall mounting
- Maintenance-Free Operation – No routine servicing required
A reliable, scalable, and safety-focused battery solution built for long-term energy independence.
48V 15kWH NEXUS LiFePO4 Battery
Choose Your Inverter Option
Choose Your Battery Option*
Choose Your Battery Quantity*
Standard
Large
Complex
Introducing the Nexus
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 300Ah of capacity, 140A max continuous discharge, and peak support up to 270A, 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 225kWh total capacity per inverter. 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
The NEXUS is compatible and parallel-able with all existing KONG and GRIZ products purchased between 2019-2024.
DOWNLOADBattery Specifications
BigBattery batteries are backed by a 12-year warranty, giving you reliable long-term performance and confidence in every charge. Designed for durability and engineered to last, our batteries are built to power your setup for over a decade. For more information, please visit our policy page
Introducing the Nexus
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 300Ah of capacity, 140A max continuous discharge, and peak support up to 270A, 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 225kWh total capacity per inverter. 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
The NEXUS is compatible and parallel-able with all existing KONG and GRIZ products purchased between 2019-2024.
Battery Specifications
BigBattery batteries are backed by a 12-year warranty, giving you reliable long-term performance and confidence in every charge. Designed for durability and engineered to last, our batteries are built to power your setup for over a decade. For more information, please visit our policy page
