BigBattery 48V ETHOS 20.2KWH (4 Module)
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BigBattery ETHOS 20.2kWh Energy Storage System (4 Module Kit + 12kW Inverter)
Whole-Home Power System — Modular Storage Meets Intelligent Energy Control
Overview
The BigBattery ETHOS 20.2kWh system is a complete residential energy storage solution designed for both grid-tied and off-grid applications. Combining stackable LiFePO4 battery modules with a 12,000W hybrid inverter, it delivers a fully integrated system capable of powering entire homes, cabins, and high-demand environments.
Built for scalability, resilience, and long-term performance, the ETHOS transforms solar generation into reliable, controllable energy.
Why This System Works
-
Complete Energy System in One Package
Includes battery storage, control system, and 12kW hybrid inverter -
High-Capacity Storage (20.2kWh System)
Supports extended runtime and whole-home backup capability -
Powerful Output Performance
Up to 10,240W continuous output with high surge handling -
Modular & Scalable Design
Expandable up to 16 parallel systems per control box -
Advanced LiFePO4 Battery Chemistry
Safe, long-lasting, and stable energy storage -
Integrated Smart BMS
Auto cell-balancing and full system protection -
All-Weather Rated (IP65)
Suitable for indoor or outdoor installation -
Smart Energy Management
Features AC coupling, peak shaving, load control, and UPS functionality -
Multiple MPPT Inputs (3)
Supports up to 18,000W solar array input -
Real-Time Monitoring & Control
LED interface + inverter touchscreen for full system visibility
System Role
Functions as a complete energy backbone, managing generation, storage, and distribution across your entire power system.
Integrates with:
- Solar arrays (up to 18kW)
- Grid power
- Backup generators
- Whole-home electrical systems
Key Specifications
| Spec | Detail |
|---|---|
| Battery Type | LiFePO4 |
| Nominal Voltage | 51.2V |
| System Voltage | 48V |
| Total Capacity | ~20.2kWh (4 Modules) |
| Amp Hours | 200Ah |
| Continuous Power Output | 10,240W |
| Peak Discharge Current | 300A (5 sec) |
| Max Charge Current | 200A |
| Solar Input Capacity | Up to 18,000W |
| Inverter Output | 12,000W |
| MPPT Inputs | 3 |
| Operating Voltage Range | 48V – 57V |
| Temperature Range | -4°F to 140°F |
| Protection Rating | IP65 |
| Certifications | UL9540, UL1973, UL9540A, UN38.3 |
| Weight | 273 lbs |
| Dimensions | 43.3" × 26.5" × 6.7" |
What’s Included
- (4) 51.2V 100Ah ETHOS Battery Modules
- (1) ETHOS Control Box
- (1) ETHOS Rack Base
- Parallel Power & Communication Cables
- 12kW Hybrid Inverter (Integrated System Pairing)
Ideal Applications
- Whole-home backup power
- Solar + storage systems
- Off-grid homesteads
- Cabins and remote properties
- Grid-tied energy savings & peak shaving
Bottom Line
A fully integrated, scalable energy system that delivers serious power, intelligent control, and long-term reliability — built to run your home, not just support it.