Product Summary:
The BigBattery ETHOS™ is a leader in both on-grid and off-grid solar installations, known for its quality, value, ease of installation, proven reliability and safety record. Expandable up to 80+ kWh, ETHOS adapts to your energy needs-perfect for home backup, off-grid, and hybrid systems.
Designed with UL 9540 certification, advanced battery management, and U.S.-engineered design, ETHOS delivers reliable, maintenance-free performance with seamless integration into leading inverter systems.
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Ships From: Texas, USA
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Warranty: 12 Years
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Support: Lifetime USA-Based Tech Support
Compatibility
UL 9540 Certified + Closed-Loop Communication (Grid-Tied):
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EG4 18kPV
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EG4 FlexBoss18
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EG4 FlexBoss21
Closed-Loop Communication (Off Grid Non-UL 9540 Installs):
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All BigBattery APEX Inverters
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All EG4 Inverters
Key Features
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LiFePO4 Battery Chemistry – Safe, stable lithium technology with long lifespan
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6,000+ Cycle Life – Built for years of daily use and long-term savings
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Advanced BMS Protection – Full protection against voltage, current, and temperature risks
- Outdoor-Ready Design – Built for durability in real-world environments along with indoor setup also
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Modular Expansion – Easily increase capacity without replacing your system
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Integrated Smart Control – Optimized performance with ETHOS controller
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Fast Installation – Simplified, plug-and-play modular setup
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Maintenance-Free – No routine servicing required
A future-ready battery platform built for energy independence-with the safety, support, and reliability you can trust.
