BigBattery 48V 61.4kWh ETHOS Commercial Battery Kit – Triple EG4 18kPV Hybrid Inverters (ESS)
Power your business with confidence using the BigBattery 48V 61.4kWh ETHOS Energy Storage System, paired with three EG4 18kPV Hybrid Inverters. This commercial-grade setup is ideal for office buildings, warehouses, job sites, or any facility in need of a reliable, high-capacity, and future-ready power solution.
With 12 stackable 5.12kWh ETHOS battery modules, this system provides over 60kWh of premium LiFePO₄ storage, engineered for unmatched safety, longevity, and resilience. The ETHOS is built with Tier 1 lithium cells, housed in IP65-rated enclosures with fire suppression, advanced BMS, and self-balancing to ensure top performance even in challenging environments.
Each ETHOS Control Box includes CANBus and RS485 communications, plus an LED display that provides real-time system health and performance status—so you always know your energy levels and system readiness.
This kit includes three high-output 12000W EG4 18kPV hybrid inverters, each offering 3 MPPTs, integrated UPS functionality, smart load control, and the ability to handle up to 54,000W of solar input combined. Whether you're grid-tied or preparing for full off-grid operation, these inverters ensure smooth transitions and optimized energy use with peak shaving and AC coupling capabilities.
Key Features:
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Battery Capacity: 61.4kWh (12 × 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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Safety: Built-in fire suppression, advanced BMS, thermal and voltage protections
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Cold Weather Ready: Self-balancing BMS for optimal year-round performance
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Monitoring: Interactive LED displays + inverter touchscreens with real-time diagnostics
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Enclosure: IP65-rated, vibration-resistant, designed for commercial-grade installations
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Expandability: Stackable and scalable for growing energy demands
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Grid Optimization: Net metering, peak shaving, and backup readiness built-in
Perfect For:
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Commercial Buildings & Office Complexes
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Warehouses & Job Sites
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Grid-Tied or Hybrid Solar Installations
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Emergency & UPS Backup Systems
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Utility Bill Reduction & Net Metering
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Off-Grid Commercial Projects
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Lead-Acid Replacement for Large-Scale Applications
What’s Included:
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12 × 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: |
K0967 |
| GTIN-12 (U.P.C.): |
850061252012 |
| 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 |
| BMS Cutoff Range: |
42 – 47V |
| Cell Configuration: |
16S 2P |
| 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: |
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: |
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
