BigBattery 48V ETHOS 15.4KWH (3 Module)
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BigBattery ETHOS 15.4kWh Energy Storage System (3 Module Kit)
Balanced Power Tier — Expandable Storage for Serious Energy Independence
Overview
The BigBattery ETHOS 15.4kWh system hits the sweet spot between compact flexibility and full-home capability. Built with three stackable LiFePO4 battery modules, it delivers robust energy storage for solar systems, backup power, and off-grid living—without overbuilding or underperforming.
Designed as a modular platform, this system grows with you, scaling from a foundational setup into a full-scale energy backbone.
Why This System Works
-
Mid-Tier Capacity, Real Capability
15.36kWh of storage supports extended runtime and higher load demands -
Modular & Stackable Design
Expand your system seamlessly as your energy needs evolve -
High Output Performance
Up to 10,240W continuous power with strong surge handling -
Advanced LiFePO4 Chemistry
Long lifespan, thermal stability, and safe operation -
Smart Battery Management System (BMS)
Auto cell-balancing with full system protection -
All-Weather Rated (IP65)
Built for indoor or outdoor installation -
Real-Time Monitoring
LED control interface keeps system health visible at all times -
Seamless Integration
CANBus and RS485 communication for inverter compatibility
System Role
Functions as a scalable energy storage core, supporting both grid-tied and off-grid systems.
Integrates with:
- Hybrid and off-grid inverters
- Solar arrays
- Backup generators
- Residential and cabin electrical systems
Key Specifications
| Spec | Detail |
|---|---|
| Battery Type | LiFePO4 |
| Nominal Voltage | 51.2V |
| System Voltage | 48V |
| Total Capacity | 15.36kWh |
| Amp Hours | 300Ah |
| Continuous Output | 10,240W |
| Peak Discharge Current | 300A (5 sec) |
| Max Charge Current | 200A |
| Operating Voltage Range | 48V – 57V |
| Temperature Range | -4°F to 140°F |
| Protection Rating | IP65 |
| Certifications | UL9540, UL1973, UL9540A, UN38.3, CE |
| Weight | 387 lbs |
| Dimensions | 59.8" × 26.5" × 6.7" |
What’s Included
- (3) 5.12kWh ETHOS Battery Modules
- (1) ETHOS Control Box
- Controller-to-Battery Power Cable
- Mounting & Integration Hardware
Ideal Applications
- Mid-to-large solar + storage systems
- Whole-home backup (partial to full load coverage)
- Off-grid cabins and homesteads
- Energy resilience upgrades
- Expandable residential energy systems
Bottom Line
A perfectly balanced energy storage system that delivers serious capacity, strong output, and the flexibility to scale — built for those ready to move beyond entry-level power.