BigBattery ETHOS 6kW 15.3kWh Off-Grid Power System

BigBattery ETHOS 6kW 15.3kWh Off-Grid Power System

Name: BigBattery ETHOS 6kW 15.3kWh Off-Grid Power System
Brand: BigBattery
SKU: K0709
Price: 6005.0 USD
Availability: InStock

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BigBattery

| SKU:

K0709

$6,005.00

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BigBattery ETHOS 6kW 15.3kWh Off-Grid Power System

Modular Lithium Storage with 6kW EG4 Inverter for Residential & Light Commercial Applications

The BigBattery ETHOS 48V 15.3kWh Off-Grid Power System is a high-capacity solution designed for 48V residential and light commercial applications, including tiny homes, cabins, homesteads, and emergency backup.

Featuring two 48V 7.68kWh LiFePO4 battery modules (15.36kWh total) and a 6000W split-phase inverter with dual MPPTs supporting up to 8000W PV input, this system ensures seamless off-grid operation with integrated UPS, stackable modular design, and full monitoring via LED display and CANBus/RS485 communication.

Key Features:

Battery Capacity: 15.36kWh (Expandable with stackable design)
Voltage: 48V – Ideal for residential & small commercial applications
Chemistry: Lithium Iron Phosphate (LiFePO4)
Inverter: 6000W split-phase with smart load control & LCD touchscreen
MPPT: Dual MPPT inputs – handles up to 8000W solar PV
Communication: CANBus & RS485 protocols for real-time monitoring
Monitoring: Interactive LED display on control box
Enclosure: IP65-rated with built-in fire suppression system
BMS: Advanced battery management with auto cell balancing
Installation: Includes wall-mount hardware for easy, 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:

3 × 48V ETHOS 5.12kWh Stackable Battery Modules – Model: FETHS-48051-G1
1 × ETHOS Control Box – Model: CNT060
1 × EG4 6kW Off-Grid Inverter (8kW PV Input) – Model: INV026
1 × 15kWh Controller-to-Battery Power Cable (4 ft / 1220mm) – Model: CBL091
Wall-mount hardware and accessories

Specifications

Parameter	Details
System Voltage	48V
Nominal Voltage	51.2V
Chemistry	LiFePO4
kWh Capacity	15.36kWh
Ah Capacity	300Ah
Charging Voltage Range	55.6 – 57V
Max Charge Voltage	57V
Operating Voltage Range	48 – 57V
Suggested Low Voltage Cutoff	48 – 50.8V
BMS Cutoff Range	42 – 47V
Cell Configuration	16S 3P
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	-4°F – 113°F (-20°C – 45°C) (Max 6 months, SoC >50%)
Weight	387 lb (175.5 kg)
Depth	6.7 in (170 mm)
Width	26.5 in (674 mm)
Height	59.8 in (1520 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

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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.
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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 6kW 15.3kWh Off-Grid Power System

$6,005.00

BigBattery ETHOS 6kW 15.3kWh Off-Grid Power System

BigBattery

K0709

#1 Authorized BigBattery Distributor

Free Shipping + No Sales Tax

Hassle-Free Returns & Exchanges

Talk To A Real Person

BigBattery ETHOS 6kW 15.3kWh Off-Grid Power System

Key Features:

Designed For 48V Applications:

Benefits:

What’s Included:

BigBattery ETHOS 6kW 15.3kWh Off-Grid Power System

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Company Information:

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