The BigBattery ETHOS 48V Lithium Battery Provides Reliable Grid-Tied Whole-Home Backup Power Without the Noise, Fuel, or Maintenance
Whether you're preparing for grid outages, lowering energy costs, or building a complete off-grid power system, the BigBattery ETHOS™ gives you dependable energy storage you can trust day after day. Built with safe LiFePO4 battery technology, advanced UL-certified protection, and expandable capacity up to 80+ kWh, ETHOS is designed to grow with your energy needs while delivering reliable, maintenance-free performance.
With seamless compatibility across leading inverter platforms like EG4 and BigBattery APEX systems, ETHOS integrates easily into both grid-tied and off-grid applications. Its plug-and-play modular design helps simplify installation, while the advanced battery management system protects against voltage, current, and temperature issues for worry-free operation year after year.
Engineered in the USA and backed by a 12-year warranty with lifetime U.S.-based technical support, the ETHOS platform is built for real-world performance in demanding environments. Whether you're preparing for outages, reducing reliance on the grid, or building a complete solar energy ecosystem, ETHOS gives you the confidence to power what matters most.
BigBattery ETHOS 48V Battery Features
Safe & Long-Lasting LiFePO4 Battery Chemistry So You Can Power Your Home With Confidence
Enjoy dependable backup power with advanced lithium iron phosphate technology designed for superior safety, thermal stability, and long service life. ETHOS batteries are built to provide reliable daily performance for home backup, solar storage, and off-grid applications without the maintenance concerns of older battery technologies.
Expandable Up to 80+ kWh So Your System Can Grow With Your Energy Needs
Start with the capacity you need today and expand your system over time without replacing existing equipment. The modular ETHOS platform makes it easy to scale from essential backup power to large whole-home energy storage systems as your needs evolve.
6,000+ Cycle Life So You Can Depend on Years of Reliable Backup Power
Designed for long-term daily use, ETHOS delivers exceptional lifespan and long-term value. With over 6,000 charge cycles, you can confidently rely on your system for backup power, solar energy storage, and energy independence for years to come.
Advanced Battery Management Protection So Your System Stays Safe and Optimized
The integrated smart BMS continuously monitors voltage, current, and temperature to help protect your investment and optimize performance. This advanced protection system helps ensure safe, stable operation in a wide range of conditions.
UL 9540 Certification So You Can Install With Greater Peace of Mind
ETHOS is engineered to meet rigorous safety standards for residential energy storage applications. UL 9540 certification provides added confidence for homeowners and installers seeking reliable, code-compliant battery backup solutions.
Seamless Inverter Compatibility So You Can Build the System You Want
Designed for compatibility with popular inverter platforms including EG4 and BigBattery APEX systems, ETHOS simplifies system design and installation for both grid-tied and off-grid applications.
Fast Plug-and-Play Installation So You Can Get Up and Running Faster
The modular stackable design and simplified connections help streamline installation while reducing setup time. Whether installed indoors or outdoors, ETHOS is engineered for clean, efficient deployment in real-world environments.
12-Year Warranty and Lifetime U.S. Support So You’re Covered for the Long Haul
Invest with confidence knowing your battery system is backed by long-term warranty protection and lifetime access to U.S.-based technical support. When questions arise, expert help is readily available.
BigBattery ETHOS Home Lithium Battery Backup Warranty
BigBattery provides a limited 12-year warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.
BigBattery ETHOS Home Lithium Battery Specifications
|
Battery Specifications
|
| GTIN-12 (U.P.C.) |
850061252005 |
| System Voltage |
48V |
| Nominal Voltage |
51.2V |
| Chemistry |
LiFePO4 |
| kWh Capacity |
10.24kWh (2x), 15.36kWh (3x), 20.48kWh (4x), 30.72kWh (6x), 40.96kWh (8x), 46.08kWh (9x) |
| Ah Capacity |
200Ah |
| Charging Voltage Range |
55.6 – 57V |
| Max Charge Voltage |
57V |
| Operating Voltage Range |
48 – 57V |
| Suggested Low Voltage Cutoff |
48 – 50.8V |
| BMS Cutoff Range |
42 – 47V |
| Cell Configuration |
16S |
| Max Continuous Discharge Current |
200A |
| Max Continuous Power |
10240W |
| Max Discharge Peak Current |
300A (Max 5 seconds) |
| Max Charge Current |
200A |
Temperature Specifications
|
| 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) |
Mechanical Specifications
|
| Weight |
273 lb (123.8 kg) |
| Depth |
6.7 in (170 mm) |
| Width |
26.5 in (674 mm) |
| Height |
43.3 in (1100 mm) |
| Max Connections |
Up to (16) parallel connections per control box |
| Protection Rating |
IP65 / NEMA 4X |
Communication & Certifications
|
| Communications |
CANBus / RS485 |
| Certifications |
UL9540, UL9540A, UL1973, & UN38.3 |
BigBattery ETHOS 48V Battery Manual & Downloads
BigBattery ETHOS 48V Battery Spec Sheet
BigBattery ETHOS 48V Battery Manual
UL9540A Certificate
UL1973 Certificate
UN38.3 Certificate
Safety Data Sheet
