BigBattery 48V ETHOS 5.12kWh Stackable Battery Module
Power your home with confidence using the BigBattery 48V ETHOS 5.12kWh Battery Module — the foundational building block of BigBattery’s powerful, modular ETHOS energy storage system. Whether you're creating a whole-home backup solution, an off-grid solar setup, or just need expandable energy security, the ETHOS brings efficiency, safety, and scalability to your fingertips.
Each module delivers 5.12kWh (100Ah) of ultra-safe, high-performance LiFePO₄ storage and is designed for stackable expansion up to 80kWh per Control Box. Built for both grid-tied and off-grid applications, the ETHOS is ideal for homes, cabins, commercial offices, and emergency power systems.
Engineered with Tier 1 lithium iron phosphate cells, each unit is housed in a rugged, IP65-rated enclosure for outdoor durability, and comes equipped with a smart Battery Management System (BMS) that continuously monitors voltage, current, and temperature. The ETHOS also features passive cell balancing, built-in fire suppression, and UL-certified ESS connectors for secure and reliable integration.
Simple to install and ready to scale, the ETHOS comes with all necessary mounting hardware and cables, making it easy to grow your system as your energy needs evolve. With over 4,000–8,000 life cycles at 80% DOD and a lifespan of 10+ years, the ETHOS is your long-term solution for clean, safe, and dependable power.
Key Features:
-
Battery Capacity: 5.12kWh (100Ah)
-
Voltage: 48V
-
Battery Chemistry: LiFePO₄ (Lithium Iron Phosphate)
-
Scalability: Expandable up to 80kWh per Control Box
-
Cycle Life: 4000–8000 cycles @ 80% DOD (0.5C rate)
-
BMS: Advanced system monitoring voltage, current, temp; passive cell balancing
-
Safety: Built-in fire extinguishing module for added protection
-
Enclosure: IP65-rated, weather-resistant, maintenance-free design
-
Connectors: UL-certified ESS-standardized connectors
Perfect For:
-
Whole Home Backup
-
Grid-Tied & Off-Grid Solar Installations
-
Cabins, Tiny Homes, & Homesteads
-
Emergency Power Systems
-
Lead Acid Battery Replacement
-
Residential & Commercial Energy Storage
-
Harsh Environments (Heat or Cold)
What’s Included:
-
1 × 48V ETHOS 5.12kWh Stackable Battery Module
-
1 × Battery Communication Cable
-
1 × Batt-to-Batt Power Parallel Cable
-
Mounting Brackets and Screws
Specifications
Product Specifications
Single Module Tech Specs
| SKU: |
FETHS-48051-G1 |
| GTIN-12 (U.P.C.): |
850061252067 |
| System Voltage: |
48V |
| Nominal Voltage: |
51.2V |
| Chemistry: |
LiFePO4 |
| kWh Capacity: |
5.12kWh |
| Ah Capacity: |
100Ah |
| Charging Voltage Range: |
55.6 – 57V |
| Max Charge Voltage: |
57V |
| Operating Voltage Range: |
48 – 57V |
| Suggested Low Voltage Cutoff: |
48 – 50.8V |
| Cell Configuration: |
16S |
| Max Continuous Discharge Current: |
100A |
| Max Continuous Power: |
5120W |
| Max Discharge Peak Current: |
150A (Max 5 seconds) |
| Max Charge Current: |
100A |
| 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) |
| Depth: |
6.7 in (170 mm) |
| Width: |
26.5 in (674 mm) |
| Height: |
16.5 in (419 mm) |
| Max Connections: |
Up to (16) parallel connections per control box |
| Protection Rating: |
IP65 |
| Communications: |
CANBus / RS485 |
| UL9540A Certification: |
UL9540A Certification |
| UL1973 Certification: |
UL1973 Certification |
| UN38.3 Certification: |
UN38.3 Certification |
| Safety Data Sheet: |
Safety Data Sheet |
Why Buy From Us
Why Buy From Ecogrid Supply?
-
Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products with full manufacturer warranties.
-
Fast, Reliable Shipping: All items ship from our U.S. warehouses with quick and dependable freight options to keep your project on track.
-
30-Day Hassle-Free Returns: Change your mind? No worries — enjoy a simple 30-day return process for peace of mind.
-
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.
-
Expert Energy Guidance: Our solar and backup energy specialists are ready to help you with design, planning, product questions, and installation tips.
-
USA-Based Service: Our team proudly operates here in the United States, providing local, knowledgeable, and friendly support.
-
Secure Payments: Shop confidently with our encrypted, secure checkout to protect your personal and payment information.
-
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
