Description
The Ethos 15.4 kWh Stackable Battery System combines three 5.12 kWh Ethos modules into a robust, pre-configured energy-storage system delivering 15.36 kWh of reliable, safe power. Engineered for flexibility and longevity, it’s the perfect solution for larger residential solar arrays, small commercial sites, and off-grid energy systems requiring scalable capacity and dependable LiFePO₄ performance.
Key Features
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High-Capacity Configuration: Three 5.12 kWh modules provide 15.36 kWh of usable energy.
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Proven LiFePO₄ Chemistry: Stable, non-toxic, and thermally safe lithium iron phosphate cells.
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Advanced Power Management: Built-in BMS with CANBus and RS485 for smart communication and control.
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Integrated Control Box & Wiring: Pre-assembled components streamline installation.
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Weather-Resistant Design: IP65-rated housing ensures protection against dust and moisture.
Product Overview
The Ethos 15.4 kWh system is the next step in Ethos’ stackable battery series — a modular design that offers true scalability and simplicity. By pairing three 51.2 V 100 Ah modules in parallel, this system doubles and triples storage capacity without compromising voltage or stability.
Each module contains its own smart Battery Management System (BMS) that monitors voltage, temperature, and current across cells for balanced and safe operation. The included Ethos Control Box connects the stack to the inverter using pre-terminated power and communication cables, making installation plug-and-play.
Thanks to its IP65 enclosure, this system can be mounted indoors or under covered outdoor locations. Its high cycle life (4,000–8,000 cycles @ 80 % DOD) and 10-year design life make it a durable investment for any long-term renewable application.
Ideal for whole-home backup or medium commercial loads, the Ethos 15.4 kWh system offers a professional, compact, and scalable energy-storage solution that can grow along with your needs.
Technical Specifications
| Specification | Details |
|---|---|
| Configuration | 3 × Ethos 5.12 kWh Modules |
| Nominal Voltage | 51.2 V |
| System Voltage | 48 V nominal |
| Total Capacity | 15.36 kWh (300 Ah) |
| Cell Configuration | 16S × 3P |
| Charging Voltage Range | 55.6 – 57 V |
| Maximum Charge Voltage | 57 V |
| Operating Voltage Range | 48 – 57 V |
| Suggested Low Voltage Cutoff | 48 – 50.8 V |
| Maximum Continuous Discharge | 250 A |
| Maximum Continuous Power | ≈ 12,800 W |
| Peak Discharge Current | 300 A (≤ 5 s) |
| Maximum Charge Current | 200 A |
| Round-Trip Efficiency | ≥ 95 % |
| Chemistry | Lithium Iron Phosphate (LiFePO₄) |
| Cycle Life | 4,000 – 8,000 cycles @ 80 % DOD |
| Communication | CANBus / RS485 |
| Enclosure Rating | IP65 |
| Charge Temperature Range | 0 °C – 45 °C |
| Discharge Temperature Range | –20 °C – 60 °C |
| Storage Temperature (SoC > 50 %) | –20 °C – 45 °C (up to 6 months) |
| Dimensions (Stacked) | Approx. 170 × 674 × 1520 mm (6.7 × 26.5 × 59.8 in) |
| Weight (Stacked) | ≈ 175 – 180 kg (385 – 397 lbs) |
| Certifications | UL9540A, UL1973, UN38.3 |
| Design Life | 10 + years |
| Warranty | 10 years |
Included in Kit
ETHOS 15.4 kWh (3 Module)
Included in Kit:
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(3) FETHS-48051-G1 – 5.12 kWh Ethos Battery Modules
Included in Each Battery Box:
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(1) Ethos Battery Module Red & Black Parallel Cable 0.7 ft (220 mm)
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(1) Ethos Battery Module Communication Cable 0.7 ft (220 mm)
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(2) L-Shaped Wall Mounting Brackets + Fasteners
Included in Control Box Kit:
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(1) CNT060 – Ethos Control Box & Accessories
• (1) Ethos Stack Base
• (2) Ethos Control Box to Inverter Power Cable Pairs 4.9 ft (1500 mm)
• (1) Ethos Control Box to Inverter Comm Cable 4.9 ft (1500 mm)
Additional Included Cable:
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(1) CBL091 – Ethos Battery Final Module to Control Box Power Cable Pair (3 Stack) 4 ft (1220 mm)
Applications
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Residential solar storage and backup
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Off-grid and hybrid energy systems
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Commercial and light industrial use
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Expandable microgrid installations
Specs & Info