BigBattery | ETHOS Battery & 12000XP Inverter 10.24– 92.16kWh | K0183

BigBattery 48V ETHOS 20.48kWh Energy Storage System

The BigBattery 48V ETHOS 20.48kWh system is a scalable, wall-mounted energy storage solution designed for off-grid living, backup power, and utility cost reduction. Ideal for tiny homes, cabins, homesteads, and residential backup applications, the ETHOS system combines a rugged IP65-rated LiFePO₄ battery platform with the high-performance EG4 12000XP 12,000W split-phase inverter to deliver reliable, whole-home power.

Engineered for long-term durability and safety, the ETHOS battery stack integrates advanced battery management, extensive certifications, and flexible communications for seamless system monitoring and expansion. With support for high solar input, generator integration, and parallel scalability, this system is built to grow with your energy needs while maintaining clean, stable power delivery.

System Architecture & Key Benefits

• Wall-mounted, space-efficient design suitable for indoor or protected outdoor installations

• Scalable capacity with up to 16 parallel battery connections per control box

• True 120/240V split-phase output, enabling operation of large appliances and essential household loads

• LiFePO₄ chemistry for long cycle life, thermal stability, and enhanced safety

• Advanced inverter efficiency and fast switching, ensuring uninterrupted power during outages

• Certified for safety and compliance, meeting stringent residential and energy storage standards

Battery Specifications (ETHOS 48V Module)

• System Voltage: 48V

• Nominal Voltage: 51.2V

• Chemistry: LiFePO₄

• Energy Capacity: 10.24kWh per battery

• Capacity: 200Ah

• Cell Configuration: 16S 2P

Electrical Performance

• Operating Voltage Range: 48 – 57V

• Charging Voltage Range: 55.6 – 57V

• Max Charge Voltage: 57V

• Suggested Low Voltage Cutoff: 48 – 50.8V

• Max Continuous Discharge Current: 200A

• Max Continuous Power: 10,240W

• Max Discharge Peak Current: 300A (5 seconds)

• Max Charge Current: 200A

Environmental Ratings

• Charge Temperature Range: 32°F – 113°F (0°C – 45°C)

• Discharge Temperature Range: -4°F – 140°F (-20°C – 60°C)

• Optimal Discharge Range: 59°F – 95°F (15°C – 35°C)

• Storage Temperature (SoC >50%): -4°F – 113°F (-20°C – 45°C), up to 6 months

Physical & Compliance

• Dimensions (D × W × H): 6.7 × 26.5 × 43.3 in

• Weight: 273 lb (123.8 kg)

• Protection Rating: IP65 / NEMA 4X

• Communications: CANBus / RS485

• Certifications: UL9540A, UL1973, UN38.3

Inverter Specifications — EG4 12000XP

AC Input & Output

• Nominal AC Voltage: 120/240VAC | 120/208VAC

• Frequency: 60Hz (default) | 50Hz (configurable)

• Nominal Output Power: 12,000W

• Max Continuous Wattage: 12,000W (L1/L2) | 6,000W (L1-N / L2-N)

• Surge Capacity:

  • 18,000W (5 seconds)

  • 15,000W (10 seconds)

• Power Factor: 0.99

• THD: <3%

• Switching Time: <10 ms (single) | <20 ms (parallel)

Solar & Charging

• MPPTs: 2 (2 inputs per MPPT)

• MPPT Voltage Range: 120 – 385VDC

• DC Input Voltage Range: 100 – 480VDC

• Nominal MPPT Voltage: 320VDC

• Max Utilized PV Power: 24,000W

• Max Recommended PV Input: 28,000W

• Max Charge / Discharge Power: 12,000W

• Battery Voltage Range: 46.4 – 60VDC

Efficiency

• MPPT Efficiency: 99%

• PV to Loads: 93.5%

• PV to Battery: 92.8%

• AC to Battery: 92.5%

• Battery to Loads: 90.2%

System Integration

• Max Parallel Inverters: 6

• Recommended Battery Capacity per Inverter: >400Ah

• Communication Interfaces: RS485 / CANBus / WiFi

• Protection Rating: IP20

Physical & Environmental

• Operating Temperature (Full Load): 32°F – 113°F (0°C – 45°C)

• Noise Level: <60 dB

• Cooling: Fan

• Weight: 104.7 lb (47.5 kg)

• Dimensions (D × W × H): 5.9 × 20.9 × 34.25 in

Ideal Use Cases

• Off-grid homes and remote residences

• Tiny homes and cabins

• Residential backup power systems

• Solar-plus-storage installations with generator support

• Utility bill reduction and energy independence