Big Battery | 48V ETHOS | 30.7KWH (6 Module)
48V ETHOS | 30.7kWh (6 Module)
High-Capacity Off-Grid Energy Storage for Reliable Power Anytime
The 48V ETHOS | 30.7kWh (6 Module) energy storage system from BigBattery is a powerful and efficient solution for off-grid living, large homes, homesteads, and estates. With a high-capacity 30.7kWh battery setup, this system provides dependable, clean power for both everyday use and emergency backup.
Built for Energy Independence
The ETHOS is designed with flexibility in mind. Its modular, stackable design makes it easy to expand as your energy needs grow. Installation is simple with all necessary hardware included, and the system is protected by a durable, IP65-rated enclosure—built to handle dust, moisture, and harsh environments.
Advanced Safety and Performance
With an advanced Battery Management System (BMS), the ETHOS ensures long-lasting performance through auto cell-balancing. An internal fire suppression system adds an extra level of safety, giving you confidence in every charge cycle.
For monitoring, the built-in LED control box provides live system updates. It also includes CANBus and RS485 communication, allowing you to track system health and performance in real-time.
Key Features:
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30.7kWh Battery Capacity (6 Modules) – Designed for large homes and off-grid setups
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48V System – Reliable and efficient energy storage
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Modular & Stackable – Expand as your energy demands increase
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Advanced BMS – Auto cell-balancing and built-in fire safety
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IP65-Rated Casing – Weather-resistant and durable
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Real-Time Monitoring – LED display with CANBus and RS485 communication
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Versatile Use – Great for solar energy storage and backup power
Your Off-Grid Power Solution
Whether you're living off-grid, building an energy-resilient home, or simply want peace of mind during power outages, the 48V ETHOS | 30.7kWh (6 Module) system delivers dependable power when you need it most. It’s the perfect match for solar systems and anyone looking for full energy independence.
What's Included
6 × 48V ETHOS 5.12kWh Stackable Battery Module
1 × ETHOS Control Box
1 × ETHOS RACK BASE
2 × Ethos Parallel Power Cable 4.9 ft (1500mm)
1 × Ethos Parallel Comm Cable 4.9 ft (150cm)
Specs and Downloads
| 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 |
| 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 |
| Communications: | CANBus / RS485 |
| Certifications: | UL9540, UL9540a, UL1973, & UN38.3 |
Are Solar Guys Pro Authorized Retailers?
Yes! We are proud to be one of the few online retailers who are authorized retailers for every single product we carry!
When Will My Order Ship?
Most orders ship within 1–3 business days. You’ll get a tracking number as soon as it ships via email!
Do We Accept Returns?
Yes absolutely, we have a no-hassle, 30-day return policy on all items! To refer to the full policy, click HERE
Are Products Brand New?
Yes! All products on Solar Guys Pro are 100% brand-new and in perfect condition.
We do not sell any used or refurbished items.
Orders over $500 include a FREE (Normally $149.99) 80-Page DIY Solar eBook — added automatically at checkout.
Frequently Asked Questions
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