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BigBattery ETHOS 48 5.12kWh - Home Battery Backup

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| SKU:

FETHS-48051-G1

$1,250.00
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BigBattery ETHOS 48 5.12kWh - Home Battery Backup

Power your home with confidence using the BigBattery 48V ETHOS 5.12kWh Battery Module — the foundational building block of the modular ETHOS energy storage system. Whether you're building a whole-home backup solution, an off-grid solar setup, or expanding existing storage, the ETHOS delivers efficiency, safety, and long-term scalability.

Each module provides 5.12kWh (100Ah) of ultra-safe LiFePO₄ storage and supports stackable expansion up to 80kWh per Control Box. Designed for both grid-tied and off-grid applications, it’s ideal for residential homes, cabins, commercial offices, and emergency backup systems.

Built with Tier 1 lithium iron phosphate cells and housed in a rugged IP65-rated enclosure, the ETHOS is engineered for durability and outdoor installation. The integrated Battery Management System (BMS) continuously monitors voltage, current, and temperature while providing passive cell balancing and built-in fire suppression.

With 4,000–8,000 life cycles at 80% depth of discharge and a lifespan of 10+ years, the ETHOS module offers dependable, long-term energy storage for evolving power needs.

Key Features:

  • Battery Capacity: 5.12kWh (100Ah)
  • Voltage: 48V
  • Battery Chemistry: LiFePO₄ (Lithium Iron Phosphate)
  • Scalability: Expandable up to 80kWh per Control Box
  • Cycle Life: 4,000–8,000 cycles @ 80% DOD (0.5C rate)
  • BMS: Advanced monitoring with passive cell balancing
  • Safety: Built-in fire suppression module
  • Enclosure: IP65-rated, weather-resistant, maintenance-free
  • Connectors: UL-certified ESS-standardized connectors

Perfect For:

  • Whole Home Backup
  • Grid-Tied & Off-Grid Solar Installations
  • Cabins, Tiny Homes & Homesteads
  • Emergency Power Systems
  • Lead Acid Battery Replacement
  • Residential & Commercial Energy Storage
  • Harsh Environments (Heat or Cold)

What’s Included:

  • 1 × 48V ETHOS 5.12kWh Stackable Battery Module
  • 1 × Battery Communication Cable
  • 1 × Battery-to-Battery Power Parallel Cable
  • Mounting Brackets & Hardware

Specifications

Parameter Details
SKU FETHS-48051-G1
GTIN-12 (U.P.C.) 850061252067
System Voltage 48V
Nominal Voltage 51.2V
Chemistry LiFePO4
kWh Capacity 5.12kWh
Ah Capacity 100Ah
Cell Configuration 16S
Charging Voltage Range 55.6 – 57V
Max Charge Voltage 57V
Operating Voltage Range 48 – 57V
Suggested Low Voltage Cutoff 48 – 50.8V
Max Continuous Discharge Current 100A
Max Continuous Power 5120W
Max Discharge Peak Current 150A (Max 5 seconds)
Max Charge Current 100A
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)
Depth 6.7 in (170 mm)
Width 26.5 in (674 mm)
Height 16.5 in (419 mm)
Max Connections Up to (16) parallel connections per control box
Protection Rating IP65
Communications CANBus / RS485

Understanding Your Power Needs

Power Calculation Guide

Sizing Metric Formula & Example
Energy Consumption (Wh) Formula: Watts × Hours
Example: 60W × 4 hrs = 240 Wh
Battery Capacity (Ah) Formula: Watt-hours ÷ System Voltage (V)
Example: 240 Wh ÷ 12V = 20 Ah
Inverter Size (W) Formula: Total Watts × 1.25 (safety margin)
Example: 300W × 1.25 = 375W → Use 400W inverter
Total Load Power (W) Formula: Sum of all appliance watts used simultaneously
Example: Light (10W) + Fan (75W) = 85W
Runtime (hrs) of Battery Formula: (Battery Ah × Voltage) ÷ Total Load (W)
Example: (100Ah × 12V) ÷ 240W = 5 hrs

Find Your Power Match

Need / Application System Recommendation
Basic lighting + phone charging Recommended Battery: 50Ah – 100Ah (12V)
Inverter Size: 100W – 200W
Notes: For small backup setups
Home office (laptop, fan, TV) Recommended Battery: 150Ah – 200Ah (12V or 24V)
Inverter Size: 500W – 1000W
Notes: For moderate usage with 4–6 hours of backup
Home backup (fridge, lights) Recommended Battery: 200Ah+ (24V or 48V recommended)
Inverter Size: 1000W – 1500W
Notes: Ideal for longer backups or heavier loads
Business / shop power backup Recommended Battery: 300Ah+ (48V system)
Inverter Size: 2000W – 3000W
Notes: Suitable for commercial setups or extended power outages

Why Shop With Us

  • Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products backed by full manufacturer warranties.
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  • Real Human Support, 7 Days a Week: Reach us by phone, email, or live chat — no bots, no overseas call centers, just experts who know off-grid power systems.
  • Expert Energy Guidance: Our solar and backup energy specialists are here to help with system design, product questions, and installation tips.
  • USA-Based Service: Local, knowledgeable, and friendly support right here in the U.S.
  • Secure Payments: Shop confidently with encrypted, secure checkout protecting your personal and payment information.
  • Built for Energy Independence: Whether powering a cabin, prepping for emergencies, or going off-grid, our products are chosen for performance, reliability, and sustainability.

BigBattery ETHOS 48 5.12kWh - Home Battery Backup

$1,250.00