BigBattery 48V 92.1kWh ETHOS Commercial Battery Kit – Triple EG4 18kPV Hybrid Inverters (ESS)
Empower your business with BigBattery’s highest-capacity ETHOS solution yet. This 92.1kWh ETHOS energy storage system, paired with three EG4 18kPV Hybrid Inverters, is the ultimate power solution for large commercial operations, warehouses, office buildings, and industrial job sites that demand consistent, scalable, and resilient power.
Featuring 18 modular 5.12kWh LiFePO₄ battery units, this system delivers unmatched energy storage capacity, superior safety, and long-lasting performance. Each ETHOS battery module comes with Tier 1 lithium iron phosphate cells, auto cell-balancing, and an integrated fire suppression system, all housed in IP65-rated enclosures designed to withstand the rigors of indoor or outdoor installation.
The system’s three ETHOS Control Boxes provide real-time monitoring via LED interface and support CANBus and RS485 communication, ensuring full visibility into voltage, capacity, and BMS status codes at all times.
Paired with three 12000W EG4 18kPV Hybrid Inverters, the system supports up to 54,000W of solar input and offers seamless on/off-grid switching, thanks to built-in UPS modules and smart load control. With AC coupling, peak shaving, and LCD touch displays, the inverters ensure your system runs efficiently and adapts to your energy needs on demand.
Key Features:
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Total Battery Capacity: 92.1kWh (18 × 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 × EG4 18kPV Hybrid Inverters (36kW Total Output | 54kW PV Input)
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Safety: Built-in fire suppression, advanced BMS with auto cell-balancing
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Cold Weather Ready: Industrial-grade reliability and performance
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Monitoring: Real-time data via inverter touchscreen + ETHOS LED interfaces
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Enclosure: IP65-rated, stackable, vibration-resistant
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Expandability: Modular design allows for scalable growth
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Grid Optimization: Net metering ready with AC coupling and peak shaving
Perfect For:
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Commercial Buildings & Offices
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Warehouses & Light Industrial Sites
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Grid-Tied and Hybrid Solar Installations
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Emergency Power & Backup Infrastructure
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Net Metering Optimization
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High-Capacity Lead-Acid Replacement
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Energy Cost Reduction and Peak Demand Control
What’s Included:
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18 × 48V ETHOS 5.12kWh Stackable Battery Modules – FETHS-48051-G1
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3 × ETHOS Control Boxes – CNT060
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3 × ETHOS Rack Bases – CNT081
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6 × 4.9 ft ETHOS Parallel Power Cables – CBL089
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3 × 4.9 ft ETHOS Parallel Communication Cables – CBL096
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3 × EG4 18kPV Hybrid Inverters – INV024
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1 × Parallel Busbar – CNT015
Specifications
Single Stack Tech Specifications
| SKU: |
K0968 |
| GTIN-12 (U.P.C.): |
850061252043 |
| 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 |
| 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
Why Buy From Ecogrid Supply?
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Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products with full manufacturer warranties.
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Fast, Reliable Shipping: All items ship from our U.S. warehouses with quick and dependable freight options to keep your project on track.
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30-Day Hassle-Free Returns: Change your mind? No worries — enjoy a simple 30-day return process for peace of mind.
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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 real people who know off-grid power systems.
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Expert Energy Guidance: Our solar and backup energy specialists are ready to help you with design, planning, product questions, and installation tips.
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USA-Based Service: Our team proudly operates here in the United States, providing local, knowledgeable, and friendly support.
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Secure Payments: Shop confidently with our encrypted, secure checkout to protect your personal and payment information.
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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
