BigBattery ETHOS 2× Expansion Kit (10.24kWh Add-On Storage)

Modular Energy Boost — Double Your Capacity, Extend Your Runtime

Overview

The BigBattery ETHOS 2× Expansion Kit is designed to seamlessly expand your existing ETHOS energy system by adding 10.24kWh of additional LiFePO4 storage. Built with the same modular architecture, this kit allows you to scale your system quickly without redesigning your setup.

It’s the cleanest way to go from “covered” to “comfortable” when it comes to backup power and solar storage.

Why This System Works

• Instant Capacity Upgrade
  Adds 10.24kWh of usable energy to your existing ETHOS system
• Seamless Integration
  Fully compatible with all ETHOS configurations
• Modular & Stackable Design
  Expand in stages as your energy needs grow
• Reliable LiFePO4 Chemistry
  Long lifespan, safe operation, and stable performance
• Smart Battery Management System (BMS)
  Ensures balanced cells, efficiency, and system protection
• All-Weather Rated (IP65)
  Suitable for indoor or outdoor installation
• Real-Time Monitoring
  LED interface provides system visibility and performance data
• Advanced Communication Compatibility
  CANBus and RS485 integration with inverters and system controls

System Role

Functions as a capacity expansion layer, increasing total storage and runtime for ETHOS energy systems.

Integrates with:

• ETHOS base systems
• Solar arrays
• Hybrid inverters
• Whole-home or off-grid energy setups

Key Specifications

What’s Included

• (2) 5.12kWh ETHOS Battery Modules
• Integration Hardware
• Communication Compatibility

Ideal Applications

• Expanding solar storage systems
• Extending backup runtime
• Off-grid energy upgrades
• Peak load management systems
• Residential energy independence builds

Bottom Line

A clean, scalable upgrade that doubles your storage capacity — giving your system more endurance, more flexibility, and more control over your energy future.