BigBattery 48V 10.24kWh ETHOS Stackable Battery Kit – EG4 18kPV Hybrid Inverter (ESS)
Power your home with confidence using the BigBattery 48V ETHOS System, delivering 10.24kWh of premium LiFePO₄ storage and paired with the cutting-edge EG4 18kPV Hybrid Inverter. This grid-tied-ready system is designed for residential solar applications, emergency backup, and off-grid flexibility, making it ideal for tiny homes, cabins, family houses, and more.
The ETHOS is BigBattery’s most advanced residential power solution, engineered with Tier 1 LFP cells and an IP65-rated enclosure for indoor safety and long-term durability. Whether you're powering through a blackout or harnessing solar energy to reduce your electric bill, the ETHOS system ensures reliable, efficient power day in and day out.
Each ETHOS battery module features a built-in Battery Management System (BMS) with auto cell balancing, thermal monitoring, and fire suppression for maximum safety. With its stackable, modular design, the ETHOS is easy to expand up to 80kWh per system, while maintaining a sleek, space-saving footprint.
This kit includes the EG4 12kW Hybrid Inverter, offering support for up to 18,000W of PV input through three MPPTs, along with AC coupling, smart load control, and an integrated UPS module for seamless on-grid/off-grid switching. With touchscreen monitoring, net metering support, and parallel scalability, this inverter is built for the future of home power.
Key Features:
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Battery Capacity: 10.24kWh (2 × 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: 12000W Hybrid Inverter with 18000W PV Input & 3 MPPTs
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BMS: Advanced protection with auto cell balancing, fire suppression, and thermal monitoring
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Cold Weather Ready: IP65-rated indoor-safe enclosure with passive cooling
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Monitoring: Real-time system status via control box LED interface and inverter touchscreen
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Expandability: Scalable up to 80kWh per system (ETHOS), inverter parallelable for higher output
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Certifications: UL-certified ESS connectors for safe and secure operation
Perfect For:
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Residential Solar Energy Systems
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Tiny Homes, Cabins, and Off-Grid Homesteads
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Whole Home Backup Power
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Emergency Power & Grid Instability
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Net Metering & Utility Savings
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Lead Acid Replacement
What’s Included:
Specifications
Product Specifications
Single Stack Tech Specs
| SKU: |
K0954 |
| GTIN-12 (U.P.C.): |
850061252005 |
| 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: |
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 (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: |
UL9540 |
| 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
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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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
