Big Battery | ETHOS 3x Expansion Kit

ETHOS 3x Expansion Kit Expand your energy storage with the ETHOS 3x Expansion Kit—a high-performance, scalable solution designed to seamlessly integrate with your existing BigBattery 48V ETHOS System. Offering 15.36kWh of additional capacity, this kit empowers homeowners, small businesses, and off-grid enthusiasts to enhance their energy independence, reduce utility costs, and build a smarter, more resilient power system. What is the ETHOS 3x Expansion Kit? The ETHOS 3x Expansion Kit includes: Three (3) 48V ETHOS battery modules (5.12kWh each) Heavy-duty rack base All necessary power and communication cables These stackable, plug-and-play LiFePO4 battery modules are engineered for durability, safety, and long-lasting performance. With support for up to 16 modules per Control Box, you can scale your residential energy storage to fit your exact needs. (Note: Control Box sold separately.) Why Choose the ETHOS 3x Expansion Kit? 15.36kWh capacity for extended backup power Tier 1