BigBattery ETHOS 48V 15.3kWh (3 Module) – Stackable Power Storage
The BigBattery ETHOS 48V 15.3kWh Stackable Power Storage System is your all-in-one solution for clean, reliable, and expandable energy. Perfect for off-grid living, emergency backup, solar storage, and residential grid-tie applications, this powerful system delivers exceptional performance with the industry’s highest safety certifications and unmatched modular flexibility.
This configuration includes three 5.12kWh LiFePO4 battery modules (15.36kWh total) and the ETHOS control box, offering intuitive power management through an interactive LED display and CANBus/RS485 communication protocols. With built-in safety features including an IP65-rated casing, auto cell balancing, and a fire suppression system, ETHOS ensures peace of mind and long-term durability.
Plus, each ETHOS module is UL9540A & UL1973 certified, and when paired with a compatible 12000W LUXPower inverter, your system becomes UL9540-certified — making it eligible for net metering programs and additional tax incentives in many states.
Key Features:
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Battery Capacity: 15.36kWh (3 × 5.12kWh modules)
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System Voltage: 48V – Perfect for off-grid and grid-tied applications
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Battery Chemistry: Lithium Iron Phosphate (LiFePO4)
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Control Box: Built-in LED system display with CANBus & RS485 communications
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Safety Features: IP65-rated enclosure, internal fire suppression, auto cell balancing
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Certifications: UL9540A, UL1973 (UL9540 system-certified when paired with LUXPower inverter)
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Expandable: Stackable and modular for future capacity growth
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Installation: Wall-mount hardware included for streamlined setup
Designed For 48V Applications
- Residential power systems
- Home solar systems
- Cabins & tiny homes
- Family homes & mansions
- Off-grid homesteads
- Emergency power
- Whole home backup
- Lead acid replacement
Benefits:
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Reliable lithium battery technology with extended cycle life
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Supports peak shaving and time-of-use optimization
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Easily scalable for larger storage needs
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Compatible with various solar PV setups and inverters
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Designed for continuous, off-grid or grid-tied energy supply
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30% Federal Tax Credit Available
What’s Included:
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3 × 48V ETHOS 5.12kWh Stackable Battery Modules – Model: FETHS-48051-G1
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1 × ETHOS Control Box – Model: CNT060
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1 × 15kWh Controller-to-Battery Power Cable (4 ft / 1220mm) – Model: CBL091
Specifications
Product Specifications
| SKU: |
K0950 |
| GTIN-12 (U.P.C.): |
850061252166 |
| System Voltage: |
48V |
| Nominal Voltage: |
51.2V |
| Chemistry: |
LiFePO4 |
| kWh Capacity: |
15.36kWh |
| Ah Capacity: |
300Ah |
| Charging Voltage Range: |
55.6 – 57V |
| Max Charge Voltage: |
57V |
| Operating Voltage Range: |
48 – 57V |
| Suggested Low Voltage Cutoff: |
48 – 50.8V |
| Cell Configuration: |
16S 3P |
| Max Continuous Discharge Current: |
250A |
| Max Continuous Power: |
12800W |
| Max Discharge Peak Current: |
300A (Max 5 seconds) |
| Max Charge Current: |
200A |
| Charge Temperature Range: |
32°F – 113°F (0°C – 45°C) |
| Discharge Temperature Range: |
-4°F – 140°F (-20°C – 60°C) |
| Optimal Discharge Temperature Range: |
59°F – 95°F (15°C – 35°C) |
| Storage Temperature Range (SoC >50%): |
-4°F – 113°F (-20°C – 45°C) (Max 6 months) |
| Weight: |
387 lb (175.5 kg) |
| Depth: |
6.7 in (170 mm) |
| Width: |
26.5 in (674 mm) |
| Height: |
59.8 in (1520 mm) |
| Max Connections: |
Up to (16) parallel connections per control box |
| Protection Rating: |
IP65 / NEMA 4X |
| Communications: |
CANBus / RS485 |
| Certifications: |
UL9540A, UL1973, & UN38.3 |
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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Fast, Reliable Shipping: All items ship from our U.S. warehouses with quick and dependable freight options to keep your project on track.
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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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Real Human Support, 7 Days a Week: Reach us by phone, email, or live chat — no bots, no overseas call centers, just real people who know off-grid power systems.
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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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USA-Based Service: Our team proudly operates here in the United States, providing local, knowledgeable, and friendly support.
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Secure Payments: Shop confidently with our encrypted, secure checkout to protect your personal and payment information.
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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
