BigBattery 48V 15.36kWh ETHOS 3X Expansion Kit – Modular Battery Add-On
Expand your power with confidence using the BigBattery 48V ETHOS 3x Expansion Kit, delivering an additional 15.36kWh of premium LiFePO₄ energy storage to your existing ETHOS system. Whether you're preparing for longer outages, scaling up your solar capacity, or simply want more autonomy, this expansion kit gives your setup the extra energy it needs—quickly and easily.
This kit includes three 5.12kWh stackable ETHOS battery modules, a rack base, and the necessary power and communication cables to integrate these batteries into your current ETHOS system. With support for up to 16 battery modules per Control Box, expanding your storage is as easy as plug and play.
Built for reliability, each module features Tier 1 LiFePO₄ cells, an advanced BMS with auto cell balancing, and an IP65-rated enclosure with integrated fire suppression for total peace of mind. Whether for residential, off-grid, or backup applications, the ETHOS 3X Expansion Kit ensures long-lasting, maintenance-free operation.
Note: This is an expansion kit only. A Control Box is required for operation and is not included.
Key Features:
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Total Capacity: 15.36kWh (3 × 5.12kWh ETHOS Modules)
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System Voltage: 48V
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Battery Chemistry: LiFePO₄ (Lithium Iron Phosphate)
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Modular Design: Stackable and parallel-connectable (up to 16 modules per Control Box)
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Advanced BMS: Real-time data, thermal monitoring, and cell balancing
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Fire Safety: Integrated fire suppression system
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Enclosure: IP65-rated, ruggedized for indoor/outdoor mounting
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Easy Integration: Includes cables and rack base for seamless expansion
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Long Life: 4000–8000 cycles @ 80% DoD
Ideal For:
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Residential Solar Storage
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Grid-Tied & Off-Grid Systems
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Tiny Homes & Cabins
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Family Homes & Large Residences
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Emergency Power Backup
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Lead-Acid Replacement
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Commercial Office & Mobile Worksites
What’s Included:
3 × 48V ETHOS 5.12kWh Stackable Battery Modules – FETHS-48051-G1
1 × ETHOS Rack Base – CNT081
2 × 4.9 ft ETHOS Parallel Power Cables – CBL089
1 × 4.9 ft ETHOS Parallel Communication Cable – CBL096
Specifications
Why Buy From Us
Why Buy From Ecogrid Supply?
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Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products with full manufacturer warranties.
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30-Day Hassle-Free Returns: Change your mind? No worries — enjoy a simple 30-day return process for peace of mind.
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Expert Energy Guidance: Our solar and backup energy specialists are ready to help you with design, planning, product questions, and installation tips.
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Built for Energy Independence: Whether you’re powering a cabin, prepping for emergencies, or going off-grid, our products are selected for performance, reliability, and sustainable operation.
Buying Guide
