BigBattery ETHOS 12kW 20.4kWh Off-Grid Power System

BigBattery ETHOS 12kW 20.4kWh Off-Grid Power System

Name: BigBattery ETHOS 12kW 20.4kWh Off-Grid Power System
Brand: BigBattery
SKU: K0710
Price: 7765.0 USD
Availability: InStock

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BigBattery

| SKU:

K0710

$7,765.00

Free shipping with delivery between Mar 31 - Apr 07

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BigBattery ETHOS 12kW 20.4kWh Off-Grid Power System

Modular Lithium Storage with EG4 12kW Inverter for High-Capacity Off-Grid Energy

The BigBattery ETHOS 48V 20.4kWh Off-Grid Power System is a top-tier energy solution for off-grid homes, cabins, homesteads, and backup systems, delivering maximum capacity, reliability, and efficiency.

Featuring four 48V 5.12kWh LiFePO4 battery modules (20.48kWh total) and the EG4 12kW split-phase inverter with dual MPPTs (24kW PV input), this system offers modular stackable design, included mounting hardware, smart load management, and full system monitoring for turnkey off-grid energy independence.

Key Features:

Battery Capacity: 20.48kWh (Expandable, modular, stackable design)
Voltage: 48V – Ideal for full off-grid homes, workshops, or large systems
Chemistry: Lithium Iron Phosphate (LiFePO4)
Inverter: EG4 12kW split-phase inverter/charger with 24kW PV support
MPPT Inputs: Dual MPPTs with 24,000W solar input capacity
Smart Monitoring: LED status display, inverter LCD touchscreen
Communication: CANBus & RS485 protocols
Safety Features: IP65-rated casing, built-in fire suppression, auto cell balancing
Installation: Includes wall-mount and rack base for fast, secure setup

Designed For 48V Applications:

Residential power systems
Home solar systems
Cabins & tiny homes
Family homes & mansions
Off-grid homesteads
Emergency power
Whole home backup
Lead acid replacement

Benefits:

Reliable lithium battery technology with extended cycle life
Supports peak shaving and time-of-use optimization
Easily scalable for larger storage needs
Compatible with various solar PV setups and inverters
Designed for continuous, off-grid energy supply
30% Federal Tax Credit Available

What’s Included:

4 × 48V ETHOS 5.12kWh Stackable Battery Modules – Model: FETHS-48051-G1
1 × ETHOS Control Box – Model: CNT060
1 × ETHOS Rack Base – Model: CNT081
1 × EG4 12kW Off-Grid Inverter (24kW PV Input) – Model: INV030
1 × Parallel Communication Cable (4.9 ft / 150cm) – Model: CBL096
2 × Parallel Power Cables (4.9 ft / 1500mm) – Model: CBL089

Specifications

Parameter	Details
System Voltage	48V
Nominal Voltage	51.2V
Chemistry	LiFePO4
kWh Capacity	10.24kWh
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
Cell Configuration	16S 2P
Max Continuous Discharge Current	200A
Max Continuous Power	10240W
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	-4°F – 113°F (-20°C – 45°C) (Max 6 months, SoC >50%)
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
Communications	CANBus / RS485
Certifications	UL9540A, UL1973, & UN38.3

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.
Fast, Reliable Shipping: Shipped from U.S. warehouses with quick, dependable freight options — keeping your project on track.
30-Day Hassle-Free Returns: Changed your mind? Enjoy a simple 30-day return process for peace of mind.
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 12kW 20.4kWh Off-Grid Power System

$7,765.00

BigBattery ETHOS 12kW 20.4kWh Off-Grid Power System

BigBattery

K0710

#1 Authorized BigBattery Distributor

Free Shipping + No Sales Tax

Hassle-Free Returns & Exchanges

Talk To A Real Person

BigBattery ETHOS 12kW 20.4kWh Off-Grid Power System

Key Features:

Designed For 48V Applications:

Benefits:

What’s Included:

BigBattery ETHOS 12kW 20.4kWh Off-Grid Power System

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Company Information:

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