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BigBattery 48V ETHOS 20.2KWH (4 Module)

BigBattery 48V ETHOS 20.2KWH (4 Module)
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$5,570.00
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$5,570.00
$5,320.00
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$5,320.00
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BigBattery ETHOS | 48V | 20.2KWH | Home Battery Backup LiFePO4

The BigBattery ETHOS 48V 20.4kWh energy storage system combines four stackable 5.12kWh LiFePO4 battery modules into a dual-tower, UL-certified configuration, delivering 20.48kWh of usable capacity and 400Ah for whole-home backup, off-grid solar storage, or time-of-use load shifting. Built on safe, stable lithium iron phosphate chemistry with an advanced integrated BMS, the ETHOS system provides maintenance-free operation with protection against overcharge, over-discharge, and thermal extremes — all housed in IP65 / NEMA 4X rated enclosures suited to garages, utility rooms, and other demanding installation environments. With 250A of continuous discharge and 12,800W of continuous power on tap, it carries multiple heavy household loads at once while holding deep reserves for extended outages.

Certified to UL1973, UL9540, UL9540A, and UN38.3, the ETHOS platform meets the safety standards required for permitted, grid-tied residential installations and is CEC listed for California solar projects. CANBus and RS485 communications ensure closed-loop compatibility with popular 48V hybrid and off-grid inverters, and the modular design leaves room to grow — additional 5.12kWh modules stack cleanly onto the same system whenever your energy needs increase. Backed by BigBattery's 12-year warranty, the ETHOS 48V 20.4kWh system is a straightforward, code-compliant foundation for lasting home energy independence.


ETHOS 48V Four Battery Module Specs

System Voltage:
48V
Nominal Voltage:
51.2V
Chemistry:
LiFePO4
kWh Capacity:
20.48kWh
Ah Capacity:
400Ah
Charging Voltage Range:
55.6V – 57V
Max Charge Voltage:
58.8V
Operating Voltage Range:
48V – 57V
Suggested Low Voltage Cutoff:
48V – 50.8V
Cell Configuration:
16S 4P
Max Continuous Discharge Current:
250A
Max Continuous Power:
12800W
Max Discharge Peak Current:
300A (Max 5 seconds)
Max Charge Current:
200A
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)
Dimensions (DxWxH):
6.7 x 53.1 x 43.3 in (170 x 1349 x 1100mm)
Weight:
513 lbs (232.7 kg)
Max Connections:
Up to (16) parallel connections per control box
Communications:
CANBus / RS485
Protection Rating:
IP65 / NEMA 4X
Certifications:
UL9540A, UL1973, & UN38.3

ETHOS 48V Four Battery Module Features

  • 20.48kWh Multi-Day Backup Capacity: Four 5.12kWh LiFePO4 modules in a dual-tower configuration store enough energy to carry a typical home's essential circuits through multi-day outages or bank substantial solar production for round-the-clock use.
  • 250A Continuous Discharge Power: With 12,800W of continuous output, the system runs well pumps, HVAC equipment, kitchen appliances, and workshop loads simultaneously without strain.
  • UL-Certified Safety Platform: Certified to UL9540A, UL1973, and UN38.3, giving you the documentation needed for permitted, code-compliant residential energy storage installations.
  • Expandable Modular Design: Additional 5.12kWh ETHOS modules stack directly onto the same system, so your storage capacity can grow with your energy needs instead of requiring a full replacement.
  • Closed-Loop Inverter Communication: CANBus and RS485 protocols keep the battery and your 48V hybrid or off-grid inverter in constant communication for optimized charging and reliable performance.
  • Weather-Resistant IP65 / NEMA 4X Enclosure: Sealed against dust and water jets, allowing confident installation in garages, utility rooms, and other demanding environments.
  • Advanced BMS Protection: Built-in battery management guards against overcharge, over-discharge, and temperature extremes, delivering maintenance-free operation you don't have to think about.
  • Compact Dual-Tower Footprint: Two side-by-side towers stand just 43.3 inches tall and 6.7 inches deep, keeping 20kWh of storage low-profile and wall-hugging instead of dominating the room.

Your Satisfaction with BigBattery is Guaranteed:

  • 12-Year Limited Warranty