Big Battery | 12kW 46kWh ETHOS Energy Storage System (ESS)
12kW 46kWh ETHOS Energy Storage System (ESS)
Power Your Home with Reliable, Scalable Solar Storage — The 12kW 46kWh ETHOS Energy Storage System (ESS) from BigBattery is the next generation in residential energy solutions. With a modular design and advanced power management features, this system is ideal for homes of all sizes—whether you're off-grid, grid-tied, or just preparing for emergencies.
Built for Performance, Designed for Homeowners
This ESS includes:
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Six high-capacity ETHOS battery modules, totaling 46.08kWh of energy storage
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One 12,000W Lux hybrid inverter for 12kW of continuous power output
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Support for solar arrays up to 18,000W, with 3 MPPT inputs for maximum efficiency
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Integrated UPS functionality for seamless transitions between grid and battery backup
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Smart load control, peak shaving, and AC coupling to optimize home energy use
Durable, Safe & Expandable
The 12kW 46kWh ETHOS Energy Storage System (ESS) is engineered for long-term residential use:
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Stackable and modular design for scalable storage expansion
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IP65-rated enclosure for dust and water resistance
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Built-in fire suppression and advanced BMS with automatic cell balancing for top-tier safety
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Control box with LED display, CANBus, and RS485 protocols for live monitoring and system diagnostics
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Easy wall-mounted installation with included hardware—perfect for garages, sheds, or outdoor walls
Ideal for Residential Energy Independence
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Cut utility costs by storing solar energy and reducing peak-time usage
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Earn through net metering and take advantage of federal/state solar tax incentives
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Keep your home powered during blackouts with reliable backup capability
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Perfect for family homes, rural cabins, or estates seeking energy autonomy
Why Choose the 12kW 46kWh ETHOS ESS?
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Turnkey solar storage solution for homeowners seeking both performance and simplicity
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12kW continuous power runs essential loads including HVAC, refrigerators, and electronics
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46kWh of storage ensures multi-day autonomy or complete daily cycling for solar homes
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Backed by BigBattery's reputation for safety, efficiency, and USA-based support
Take full control of your home’s energy with the 12kW 46kWh ETHOS Energy Storage System (ESS) — dependable, smart, and built to reduce your dependence on the grid.
What's Included
9 × 48V ETHOS 5.12kWh Stackable Battery Module
1 × ETHOS Control Box
2 × ETHOS RACK BASE
1 × LUXPower 12kW Hybrid Inverter
4 × Ethos Parallel Power Cable 4.9 ft (1500mm)
2 × Ethos Parallel Comm Cable 4.9 ft (150cm)
1 × 15kWh Ethos Controller to Battery Power Cable 4ft (1220mm)
Specs and Downloads
System Spec Sheet
Inverter Spec Sheet
Single Stack Tech Specs
| SKU: | K0754 |
| 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 |
Inverter
Registration & WiFi Setup Guide
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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
Get your 30% Tax Solar Credit!
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At Solar Guys Pro, our commitment is to you. Please be reminded that our expertise does not extend to tax advice. Nonetheless, our dedicated staff is eager to guide you through the process and ensure you capitalize on this exceptional offer.
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