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BigBattery ETHOS 48V 5.1kWh LiFePO4 Home Battery Backup

BigBattery ETHOS 48V 5.1kWh LiFePO4 Home Battery Backup
$1,250.00 - $1,250.00
$1,250.00
$1,250.00 - $1,250.00
$1,250.00
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BigBattery ETHOS | 48V | 5.1kWh | UL1973 | Home Battery Backup LiFePO4

The BigBattery ETHOS 48V 5.1kWh battery module is a stackable LiFePO4 expansion unit designed to grow an existing ETHOS home battery backup or solar energy storage system. Rather than a standalone kit, this 51.2V nominal module integrates directly with the ETHOS controller and rack architecture, letting homeowners add 5.12kWh of usable capacity at a time as household energy demands increase — whether that's supporting 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 module delivers maintenance-free operation with protection against overcharge, over-discharge, and thermal extremes, all inside an IP65 / NEMA 4X rated enclosure suitable for demanding installation environments.

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 tower design scales cleanly — simply stack additional modules to multiply capacity within a single UL-certified system. Backed by BigBattery's 12-year warranty, the ETHOS 48V 5.1kWh module is a straightforward, code-compliant path to expanding home energy independence without replacing your existing setup.


ETHOS 48V Singular Battery Module Specs

System Voltage:
48V
Nominal Voltage:
51.2V
Chemistry:
LiFePO4
kWh Capacity:
5.12kWh
Ah Capacity:
100Ah
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
Max Continuous Discharge Current:
100A
Max Continuous Power:
5120W
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 26.5 x 16.14 in (170 x 674 x 410mm)
Weight:
121 lbs (54.8 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 Singular Battery Module Features

  • Stackable 5.12kWh Expansion Module: Adds 5.12kWh of LiFePO4 capacity to an existing ETHOS system, letting you scale your home backup or off-grid storage one module at a time as your energy needs grow.
  • UL-Certified Safety Platform: Certified to UL9540A, UL1973, and UN38.3, giving you the documentation needed for permitted, code-compliant residential energy storage installations.
  • Seamless ETHOS Integration: Designed to drop into the ETHOS controller and rack architecture, so expanding your system is a straightforward stack-and-connect process rather than a rewiring project.
  • 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.
  • Wide Operating Temperature Window: Discharges reliably from -4°F to 140°F, keeping your backup power available through cold snaps and summer heat alike.
  • Manageable Modular Footprint: At 121 lbs and just 6.7 inches deep, each module is far easier to position and install than a single monolithic battery bank of equivalent capacity.

Your Satisfaction with BigBattery is Guaranteed:

  • 12-Year Limited Warranty