BigBattery 48V 46.1kWh ETHOS Stackable Battery Kit – Triple EG4 18kPV Hybrid Inverters (ESS)
Take complete control of your home’s energy with the BigBattery 48V 46.1kWh ETHOS System, a high-performance, grid-tied energy solution designed for large homes, off-grid estates, and commercial-grade backup. This configuration delivers 46.1kWh of clean, lithium power, paired with three advanced EG4 18kPV Hybrid Inverters, offering unparalleled scalability, smart energy management, and peace of mind in any environment.
Each of the nine ETHOS 5.12kWh battery modules features Tier 1 LiFePO₄ cells, packed into a stackable, IP65-rated casing engineered for long life, safety, and outdoor installation. With auto-balancing BMS, fire suppression, and rugged construction, the ETHOS ensures dependable power in all weather conditions.
The included ETHOS Control Boxes provide smart monitoring with LED system displays, status alerts, and RS485/CANBus communication. This system makes it easy to manage and expand your power storage without hassle.
Paired with three EG4 18kPV Hybrid Inverters, this ESS package supports up to 54,000W of PV input, with nine MPPT inputs total, UPS functionality, and smart load control. These inverters are built for seamless grid interaction, full off-grid capability, and compatibility with net metering and utility incentives—giving you greater independence and monthly savings.
Key Features:
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Battery Capacity: 46.1kWh (9 × 5.12kWh ETHOS Modules)
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System Voltage: 48V
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Battery Chemistry: LiFePO₄ (Lithium Iron Phosphate)
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Inverter Setup: 3 × 12000W EG4 18kPV Hybrid Inverters (Total 36kW Output | 54kW PV Input)
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BMS: Advanced protection with cell balancing, thermal regulation, fire suppression
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Cold Weather Ready: Built-in design for safe year-round performance
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Monitoring: LED display on control box + inverter LCD touchscreen interfaces
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Enclosure: IP65-rated, outdoor-hardened, vibration-resistant
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Expandability: Stackable modules and scalable inverter pairing
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Efficiency: Smart load control, peak shaving, and AC coupling built in
Perfect For:
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Large Family Homes & Multi-Room Properties
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Solar-Powered Estates & Homesteads
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Grid-Tied + Off-Grid Energy Solutions
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Emergency Backup Power Systems
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Net Metering & Utility Offset Programs
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Lead-Acid Battery Replacements
What’s Included:
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9 × 48V ETHOS 5.12kWh Stackable Battery Modules – FETHS-48051-G1
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3 × ETHOS Control Boxes – CNT060
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3 × EG4 18kPV Hybrid Inverters – INV024
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3 × 15kWh ETHOS Controller to Battery Power Cables (4ft) – CBL091
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1 × Parallel Busbar – CNT015
Specifications
Single Stack Tech Specifications
| SKU: |
K0966 |
| GTIN-12 (U.P.C.): |
850061252050 |
| 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 (SoC >50%): |
-4°F – 113°F (-20°C – 45°C) (Max 6 months) |
| 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: |
UL9540, UL9540A, UL1973, & UN38.3 |
| Spec Sheet: |
Spec Sheet |
| User Manual: |
User Manual |
| UL9540 Certification: |
UL9540 Certification |
| UL9540A Certification: |
UL9540A Certification |
| UL1973 Certification: |
UL1973 Certification |
| UN38.3 Certification: |
UN38.3 Certification |
| Safety Data Sheet: |
Safety Data Sheet |
| View Our CEC Listing: |
View Our CEC Listing |
Inverter Downloads
Why Buy From Us
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Built for Energy Independence: Whether you’re powering a cabin, prepping for emergencies, or going off-grid, our products are selected for performance, reliability, and sustainable operation.
Buying Guide
